in detail about cap splints

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https://pmc.ncbi.nlm.nih.gov/articles/PMC9897721

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"cap splint" mandibular fracture management

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PMID: 40515765

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https://pmc.ncbi.nlm.nih.gov/articles/PMC9897721

Here is a detailed, comprehensive overview of cap splints in oral and maxillofacial surgery.

Cap Splints - Detailed Overview

Definition

A cap splint is a dental appliance that encases (or "caps") the crowns of teeth to provide immobilization and stabilization of fractured jaw segments, primarily in the management of mandibular and maxillary fractures. It acts as an occlusal guide, helps restore premorbid occlusion, and serves as an anchor for intermaxillary fixation (IMF).

The name "cap" reflects the appliance's design - it covers the entire occlusal and buccal/lingual surfaces of the teeth like a cap, distributing forces over multiple teeth rather than individual ones.

Historical Background

Cap splints have been used since the 19th century and are considered a time-honored technique in maxillofacial surgery. Although newer methods such as open reduction and internal fixation (ORIF) with miniplates have reduced their routine use in adults, cap splints remain highly relevant - especially in pediatric patients - due to their conservative, non-invasive nature. Cast metal cap splint for mandibular fracture (Yuffa et al., Oral Surgery 2015)

Types of Cap Splints

1. Based on Material

A. Acrylic (Resin) Cap Splint

Made from cold-cure or heat-cure polymethylmethacrylate (PMMA) acrylic resin
Most commonly used today, especially in pediatric cases
Fabricated in a dental laboratory using an impression/model
Advantages: lighter, easily adjustable, good occlusal coverage, biocompatible
Disadvantage: can fracture under heavy occlusal loads; requires skilled technician

B. Cast Metal Cap Splint

Fabricated from metal alloy (cobalt-chromium or gold alloys) using the lost-wax casting technique
More durable and precise than acrylic
Typically has a locking plate mechanism to allow sectional construction, especially useful when the fractured lower jaw must be reduced in segments
Cemented with glass ionomer cement
Classic technique described by Robertson (1964) and McGregor (1971)
Still used in complex adult fractures where surgical fixation is contraindicated

2. Based on Design/Coverage

A. Closed (Solid) Cap Splint

Completely covers all the occlusal surfaces
Provides maximum immobilization
Prevents tooth eruption
Less suitable for growing children with developing dentition

B. Open (Occlusal) Cap Splint

Has windows/openings over the occlusal surfaces of some teeth
Allows partial tooth eruption and continued dental development
Preferred in children with mixed dentition
Reduces risk of impeding eruption of permanent teeth
A modified open cap splint can incorporate arch bar hooks and molar tubes to facilitate IMF

3. Based on Location/Application

Type	Location	Use
Mandibular cap splint	Lower arch	Most common - for mandibular fractures
Maxillary cap splint	Upper arch	For maxillary/mid-face fractures, palatal fractures
Combined (both arches)	Upper + lower	Used together for IMF in bilateral fractures
Sectional cap splint	Lower jaw in two halves	For displaced fractures requiring reduction in parts

Indications

Pediatric mandibular fractures - the primary modern indication, especially:
- Non-displaced or minimally displaced fractures
- Symphysis, parasymphysis, and body fractures
- Greenstick fractures
- Mixed and primary dentition (where arch bars are inadequate)
Adult mandibular fractures - when ORIF is contraindicated:
- Concurrent cervical spine injuries (unable to position for surgery)
- Medical comorbidities precluding general anesthesia
- Complex multi-site fractures needing conservative stabilization
Maxillary fractures - as part of combined IMF
Post-orthognathic surgery stabilization
Alveolar fractures with multiple involved teeth

According to a 2025 systematic review (Kumari et al.), cap splints are recommended for non-displaced pediatric mandibular fractures not involving the condyle, and luting cement is an acceptable alternative to circummandibular wiring for fixation.

Contraindications

Condylar fractures (relative - other methods preferred)
Severely displaced/comminuted fractures in adults (ORIF preferred)
Insufficient tooth structure for retention
Poor oral hygiene making cementation unreliable

Fabrication Steps

Step 1: Impressions

Maxillary and mandibular alginate impressions are taken
In fracture cases, the lower impression may be sectioned to reproduce the fractured anatomy

Step 2: Model Mounting

Both upper and lower dental models are mounted on an articulator
The premorbid occlusion is reproduced using the maxillary model as reference

Step 3: Wax Pattern

A wax pattern is constructed covering all teeth surfaces on the model
For sectional splints (fracture cases), the lower is made in two parts with a space at the fracture site

Step 4: Processing

Acrylic splint: Wax invested and packed with PMMA resin (cold or heat cure); finished and polished
Cast metal splint: Wax invested, burned out, metal alloy cast using lost-wax technique; then polished

Step 5: Additions (if needed)

Locking plates soldered to each segment of sectional splints
Eyelets or hooks welded for IMF wires
Arch bar hooks incorporated for modified designs
Molar tubes for elastics

Step 6: Cementation

Fitted in the mouth after fracture reduction
Cemented with zinc phosphate or glass ionomer cement
For sectional splints: segments connected with a locking bar/screw after cementation

Step 7: IMF Application

Elastic or wire intermaxillary fixation applied between upper and lower splints
Maintained typically for 4-6 weeks

Step 8: Removal

Splints removed after radiographic evidence of bony healing (typically 6-8 weeks in children, up to 6 weeks in adults)

Mechanism of Action

A cap splint works by:

Occlusion-guided reduction - the upper splint acts as a template; the lower splint holds fractured segments in correct alignment against it
Load distribution - forces are distributed over all capped teeth rather than individual teeth, minimizing the risk of tooth injury
Rigid immobilization - when used with IMF, prevents movement at the fracture site allowing bone healing
Splinting effect - teeth adjacent to the fracture are stabilized by being incorporated into a single rigid unit

Fixation Methods Used with Cap Splints

Method	Details
Circummandibular wiring	Wire passed around the mandible and through holes in the splint; gold standard for retention in children
Luting cement alone	Zinc phosphate or GIC; used as alternative to wiring, especially in cooperative patients
Circumzygomatic wiring	For maxillary splint retention in midface fractures
Intermaxillary fixation (IMF)	Wires or elastics between upper and lower splints
Interdental wiring	Wires placed between individual teeth through holes in splint

Advantages

Non-invasive - no surgical incisions required (closed reduction)
Preservation of growth - does not damage periosteum or developing tooth buds (critical in children)
Occlusion-guided reduction - ensures restoration of premorbid bite
Maximum stability during healing without hardware
No second surgery needed for hardware removal (unlike plates and screws)
Applicable in any age group - even very young children with primary dentition
Ease of oral hygiene maintenance compared to arch bars
Protects injured teeth from further trauma

Disadvantages

Requires a skilled dental laboratory technician
Time-consuming to fabricate (laboratory time needed before surgery)
Thickness of splint may affect occlusion
Not suitable for severely displaced fractures needing ORIF
May impede tooth eruption if design is not carefully planned
Risk of splint fracture under heavy loads (acrylic type)
Cementation failure possible, especially on primary teeth with short crowns

Special Consideration: Pediatric Use

Cap splints are the preferred first-line conservative treatment for pediatric mandibular fractures because:

Open reduction risks damage to developing permanent tooth buds embedded in the mandible
Rigid plates may tether growth of the mandible
Children have robust healing capacity and can heal with conservative methods
Open cap splints allow continued eruption of permanent teeth during the healing period

The 2025 systematic review by Kumari et al. (PMID 40515765) across 47 studies confirmed that cap splints with either circummandibular wiring or luting cement are effective for non-displaced pediatric mandibular fractures not involving the condyle.

Cap Splint vs. Gunning Splint

Feature	Cap Splint	Gunning Splint
Dentition	Dentate patients	Edentulous patients
Retention	Cemented onto teeth	Retained by circumferential wiring/denture adhesive
Material	Acrylic or metal	Vulcanite rubber or acrylic
Design	Covers tooth crowns	Covers the edentulous ridge
IMF	Via eyelets on splint	Via eyelets on splint

Summary

Cap splints remain a relevant and effective tool in oral and maxillofacial surgery. While largely superseded by rigid internal fixation in adult practice, they are the cornerstone of conservative fracture management in the pediatric population. The choice between acrylic and cast metal, and between open and closed designs, depends on the patient's age, dentition status, fracture pattern, and whether growth preservation is a priority.

does cap splints used in dentoalveolar fractures of pediatric patients

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"dentoalveolar fracture" pediatric splint management

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cap splint dentoalveolar fractures pediatric children alveolar process treatment

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PMID: 32454961

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alveolar fracture children splinting acrylic cap circummandibular wiring

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https://pmc.ncbi.nlm.nih.gov/articles/PMC7235701

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cap splint acrylic alveolar fracture children circummandibular wiring technique stabilization

Yes - cap splints are indeed used in dentoalveolar fractures of pediatric patients, and they are in fact one of the two traditionally most used modalities for this purpose. Here is a detailed answer:

Cap Splints in Pediatric Dentoalveolar Fractures

What is a Dentoalveolar Fracture?

A dentoalveolar fracture involves fracture of the alveolar process (the tooth-bearing bone), typically with associated dental injuries - tooth displacement, luxation, or avulsion. These are among the most common pediatric facial injuries, with a prevalence of 11-30% in children with primary dentition and 5-20% in those with permanent dentition.

Yes - Cap Splints ARE Used, and Here's Why They Are Preferred in Children

The evidence-based systematic review on dentoalveolar fractures (PMC11217696) clearly states:

"The two most commonly used modalities for stabilization of displaced dentoalveolar fractures are: the application of arch bars fixed with inter-dental wiring AND the use of metal (cap) splint/acrylic plates fixed using circummandibular wiring."

However, in pediatric patients - particularly those in mixed or primary dentition - cap splints are specifically preferred over arch bars because:

Problem with Arch Bars in Children	Solution with Cap Splints
Height of contour of deciduous teeth is below the gingival level	Cap covers the entire crown - no height-of-contour dependency
Root resorption of deciduous teeth makes arch bars unstable	Cap distributes force over the whole dental arch
Incomplete root formation of erupting permanent teeth	Cap does not depend on root length for retention
Arch bar bending to fit small deciduous teeth is technically demanding	Cap is laboratory-fabricated to exact fit

Specific Indications in Pediatric Dentoalveolar Fractures

1. Alveolar Process Fractures

Fractures of the alveolar segment with or without mobile teeth
Cap splint immobilizes the entire fractured segment, restoring and maintaining premorbid occlusion
Avoids the need for ORIF, which risks damaging developing permanent tooth buds embedded in the alveolar bone

2. Symphysis and Parasymphysis Fractures with Alveolar Involvement

Very common in children (falling on chin)
Acrylic cap splint retained with circummandibular wiring remains the treatment of choice in the mixed dentition stage (Swayampakula et al., Cureus 2023, PMID 36751198)

3. Mandibular Body Fractures with Alveolar Disruption

Modified open cap splints used when fracture line involves the alveolar crest
Open design allows continued eruption of teeth during healing

4. Maxillary Alveolar Fractures

Maxillary cap splint combined with circumzygomatic wiring for midface/palatal dentoalveolar fractures

Why Cap Splints Are Particularly Valuable in Pediatric Dentoalveolar Fractures

1. Preservation of Developing Tooth Buds

The alveolar bone in children is packed with developing permanent tooth buds
ORIF with miniplates and screws risks direct damage to these buds during drilling
Cap splint allows fracture stabilization from outside the bone entirely - no intraosseous hardware

2. No Growth Disturbance

Plates secured to growing alveolar bone can act as tethers, causing asymmetric jaw growth
Cap splint imposes no restriction on bone growth since it is attached to teeth, not bone

3. No Periosteal Disruption

Surgical flap elevation strips periosteum, which is a critical source of blood supply and bone formation in children
Conservative cap splint approach preserves the periosteal envelope

4. Shorter Healing - Shorter Wear Time

Children heal faster due to thinner cortical bone, rich blood supply, and active bone metabolism
Typical cap splint retention: 2-3 weeks in children vs. 4-6 weeks in adults
Earlier removal reduces the risk of TMJ ankylosis (a serious concern with prolonged IMF in children)

Types of Cap Splints Used in Pediatric Dentoalveolar Fractures

Acrylic Cap Splint (Most Common)

PMMA-based, fabricated on a dental model
Covers all teeth in the arch
Retained with circummandibular wiring or glass ionomer cement (GIC)
Easy to apply and remove
Allows maintenance of oral hygiene

Modified Open Cap Splint

Has windows/openings in the occlusal surface
Allows continued eruption of teeth
Can incorporate arch bar hooks or buccal tubes for use of elastics
Used by Jha et al. (2023, PMID 37731795) for delayed mandibular dentoalveolar fractures in children

Metal (Cast) Cap Splint

More durable, precise
Used when acrylic is at risk of fracture under occlusal loads
More time-consuming to fabricate

Vacuum-Formed Splint (Modern Alternative)

Made from transparent thermoplastic sheet using a vacuum-forming machine
First reported by Lloyd (2001) for mandibular fractures in children
Highly retentive due to close adaptation to teeth and alveolar undercuts
Can be retained with GIC alone (no circummandibular wiring) - fully outpatient, under local anesthesia
Nilesh et al. (2020, PMID 32454961) reported successful use in a 12-year-old with displaced mandibular dentoalveolar fracture

Fixation Methods Used with Cap Splints in Children

Method	When Used
Circummandibular wiring	Gold standard for mandibular cap splint retention in active fractures
Glass ionomer cement (GIC) luting	Alternative to wiring; suitable for minimally displaced/cooperative patients; avoids GA
Circumzygomatic wiring	For maxillary cap splint retention
Cross elastics	For guiding occlusion in modified splints with buccal arch bar hooks
Interdental wiring through splint holes	Adjunct retention

Fabrication Steps for Pediatric Dentoalveolar Fracture Cap Splint

Alginate impressions taken under local anesthesia (or GA if needed)
Dental stone casts poured and mounted on articulator
Acrylic cap splint fabricated in the lab - covers all teeth, with or without occlusal windows
Fracture reduced clinically - alveolar segment repositioned manually
Splint cemented with GIC or zinc phosphate cement
Retention wires placed - circummandibular wires passed using mandibular awl (26-gauge wire), tightened on buccal and lingual aspects
OPG taken to confirm reduction
Follow-up weekly - clinical and radiographic monitoring
Removal at 2-3 weeks in children (earlier than adults due to rapid healing)

Splinting Duration (Pediatric vs. Adult)

Age Group	Recommended Duration	Rationale
Pediatric (2-12 years)	2-3 weeks	Rapid bone healing, avoid TMJ ankylosis, prevent growth restriction
Adult (>12 years)	3-4 weeks	Slower bone metabolism
IADT Recommendation	4 weeks (all ages)	Conservative guideline recommendation

Outcomes

Published case reports and the 2025 systematic review (Kumari et al., PMID 40515765) consistently show:

Stable occlusion restored post-treatment
Good bony healing on OPG at follow-up
No growth disturbance
No tooth bud damage
Good patient compliance and comfort
Oral hygiene maintainable during treatment period

Summary

Cap splints are not just "used" in pediatric dentoalveolar fractures - they are one of the two traditional first-line methods for this indication. In children with primary or mixed dentition, they are actually preferred over arch bars because of the anatomical characteristics of deciduous teeth. The acrylic cap splint with circummandibular wiring remains the treatment of choice for managing pediatric dentoalveolar and mandibular fractures conservatively, especially when developing tooth buds preclude the use of plates and screws.

can we use cap splints for luxated primary dentition with refernces

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luxated primary teeth splinting management

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PMID: 36930443

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PMID: 37433924

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https://pmc.ncbi.nlm.nih.gov/articles/PMC12094451

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PMID: 36968882

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PMID: 34562981

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This is a nuanced topic with an important answer. Here is a comprehensive, reference-backed response:

Can Cap Splints Be Used for Luxated Primary Dentition?

The Short, Direct Answer

Cap splints specifically - as rigid splints - are generally NOT the recommended first-choice splint for luxated primary teeth. The IADT 2020 guidelines and current evidence recommend flexible splints when splinting is indicated in primary dentition. Cap splints are rigid appliances, and their use in primary tooth luxations requires careful consideration.

However, splinting of luxated primary teeth is sometimes indicated in specific situations, and the question of which splint type to use depends on the luxation type.

Understanding the Key Distinction: Rigid vs. Flexible Splints

Feature	Rigid Splint (e.g., Cap Splint)	Flexible Splint (e.g., Composite-wire, TTS)
Tooth mobility allowed	None	Yes - physiological movement preserved
Risk of ankylosis	Higher	Lower
Risk of pulp necrosis	Higher	Lower
Risk of external root resorption	Higher	Lower
Use in primary dentition	Restricted (alveolar fractures mainly)	Preferred for luxation injuries
Duration in primary dentition	4 weeks	2-4 weeks depending on injury

As stated by StatPearls - Trauma to the Primary Dentition (NCBI):

"The IADT guidelines recommend using a flexible splint. A flexible splint (e.g., titanium trauma splint, composite and wire splint) allows functional movement in contrast to a rigid splint (e.g., composite splints) where the injured teeth are immobilized."

IADT 2020 Guidelines: When to Splint in Primary Dentition

Per the IADT 2020 guidelines (Dental Traumatology 2020;36:343-359), splinting in primary dentition is indicated only in three specific scenarios:

Injury Type	Splinting Indicated?	Type	Duration
Concussion	No - observation only	-	-
Subluxation	No - observation only	-	-
Extrusive luxation (<3mm)	Sometimes	Flexible	2-3 weeks
Lateral luxation (severe, with occlusal interference, repositioned)	Yes - if repositioned and unstable	Flexible	4 weeks
Intrusive luxation	No - observation/extraction	-	-
Root fracture	Occasionally	Flexible	4 weeks
Alveolar fracture	Yes	Flexible	4 weeks
Avulsion	No - do NOT reimplant primary teeth	-	-

Luxation Type-by-Type Analysis for Cap Splint Use

1. Concussion and Subluxation

No splinting needed at all - observation only
Cap splint: Not indicated

2. Extrusive Luxation (tooth partially displaced out of socket)

If displacement is < 3 mm with no occlusal interference: allow spontaneous re-eruption, no splint
If displacement is > 3 mm: extraction recommended
If repositioned and unstable: flexible splint for 2-3 weeks
Cap splint (rigid): Not recommended - flexible is preferred
Reference: Di Giorgio et al., 2021 (PMID 34562981) - used flexible orthodontic splint for extrusive luxation + root fracture in a 3.5-year-old with good outcome

3. Lateral Luxation (most common luxation type)

Minimal/no occlusal interference: allow spontaneous repositioning - no splint
Severe displacement with occlusal interference: reposition + flexible splint for 4 weeks
Cap splint (rigid): Not specifically recommended; flexible composite-wire splint is the standard
Reference: Das et al., Cureus 2023 (PMID 36968882) - composite resin splinting for lateral luxation of primary maxillary incisors in a 5-year-old, splinted 4 weeks, good outcome with no damage to permanent successor

4. Intrusive Luxation

No splinting - monitor for spontaneous re-eruption (expected in 1-6 months)
Extract if apex displaced toward permanent tooth bud
Cap splint: Not indicated

5. Root Fracture in Primary Teeth

If coronal fragment is not mobile and no occlusal interference: observe
If unstable: flexible splint for 4 weeks; if fragment is very mobile, extract coronal fragment
Cap splint: Occasionally used for immobilization in root fractures of primary teeth
This is one of the situations where a rigid/semi-rigid approach may be considered

6. Alveolar Fracture (the main indication)

Flexible splint for 4 weeks (IADT recommendation)
Cap splint has historically been used here and remains clinically relevant - see previous discussion
The evidence supporting cap splint use in alveolar fractures is stronger than for luxation alone

Why Cap Splints Are Generally Avoided for Pure Luxation in Primary Teeth

1. Risk to Permanent Successor

The most important concern in primary dentition is damage to the underlying permanent tooth germ. A rigid cap splint:

May prolong immobilization stress on the alveolus
If combined with repositioning trauma, increases risk of disturbance to permanent tooth development
Ankylosis of primary tooth from rigid immobilization can interfere with permanent tooth eruption

2. Short Root Length of Primary Teeth

Primary teeth have shorter roots, especially those undergoing physiological resorption - they do not tolerate rigid immobilization as well, and ankylosis risk is higher.

3. Periodontal Ligament Concerns

Rigid splinting eliminates physiological tooth movement. In primary teeth, the PDL needs some functional stimulus to maintain vascularity and normal healing. Flexible splints preserve this.

4. Limited Retention

Primary teeth (especially in young children aged 2-5 years) have short clinical crowns, making cap splint cementation technically difficult and potentially unreliable.

When a Cap Splint Might Still Be Considered in Primary Dentition

Despite the above, literature acknowledges individualized use of cap splints in specific clinical scenarios:

Alveolar fracture with concurrent luxated teeth - the cap splint immobilizes the entire segment including the luxated teeth
Multiple luxated primary teeth across a fractured alveolar segment - isolated flexible splinting is not feasible; the cap splint stabilizes the whole arch unit
Older cooperative children (6-8 years) approaching physiological exfoliation - less concern about growth interference
When flexible splinting materials are unavailable in resource-limited settings
Modified open cap splint - allows some tooth movement, used in mixed dentition fractures with alveolar involvement

The systematic review on adverse effects of splinting luxated primary teeth (PMC12094451) states:

"Individualized employment of the splinting option may be considered in other specific clinical conditions without jeopardizing the dentoalveolar health."

The Evidence on Splinting Primary Teeth: What Systematic Reviews Show

Fernandez et al., 2023 (PMID 36930443) - Systematic Review

Highest-level evidence available (Systematic Review, Tier 1)
3 retrospective studies included
Root fractures in primary teeth: high success rate with splinting
Lateral luxation: benefit of splinting was not clearly identified, though it may be a recommended approach
Conclusion: "Based on low level of evidence, findings highlight better clinical success rate of TS in management of deciduous teeth with root fractures"
Journal: European Archives of Paediatric Dentistry, 2023

Deery, 2023 (PMID 37433924) - Evidence-Based Dentistry Commentary

Reviewed same 3 retrospective studies
"Outcome of management of root fractures in primary teeth may benefit from flexible splinting"
Evidence base is low overall

Recommended Splint Types for Primary Dentition (Not Cap Splints)

When splinting IS indicated for luxated primary teeth, these are preferred over cap splints:

Splint Type	Description	Advantage in Primary Dentition
Composite resin + wire (acid-etch)	Wire bonded with composite resin to adjacent teeth	Flexible, semi-rigid, easy, common
Titanium Trauma Splint (TTS)	Thin titanium mesh bonded with composite	Flexible, biocompatible, allows physiological movement
Orthodontic flexible wire splint	Stainless steel/NiTi wire bonded across adjacent teeth	Most flexible option
Vacuum-formed thermoplastic splint	Thermoplastic sheet adapted to teeth, bonded with GIC	Minimally invasive, outpatient, excellent anatomical fit

Summary Table

Luxation Type	Splinting in Primary Teeth	Cap Splint Appropriate?	Recommended Splint
Concussion	Not indicated	No	-
Subluxation	Not indicated	No	-
Extrusive luxation (<3mm)	Rarely; if unstable after repositioning	No	Flexible (composite-wire)
Extrusive luxation (>3mm)	Extract	No	-
Lateral luxation (mild)	Not needed	No	-
Lateral luxation (severe, repositioned)	Yes - 4 weeks	No (use flexible)	Flexible (composite-wire, TTS)
Intrusive luxation	Not indicated	No	-
Root fracture	Occasionally - 4 weeks	Rigid only if necessary	Flexible preferred
Alveolar fracture with luxation	Yes - 4 weeks	Yes - acceptable here	Flexible/cap splint

Key References

IADT 2020 Guidelines - Primary Dentition - Malmgren et al. Dental Traumatology 2020;36(4):343-359. doi: 10.1111/edt.12576 - AAPD-endorsed guidelines
Fernandez MDS et al. (2023) - "Splinting in the management of dental trauma in the primary dentition: a systematic review." Eur Arch Paediatr Dent. 2023;74(2):279-287. PMID 36930443
Deery C (2023) - "Should we splint traumatised primary teeth?" Evid Based Dent. 2023;24(3):118-119. PMID 37433924
Adverse effects of splinting of luxated primary teeth (2025) - Systematic review confirming IADT-2020 recommendation for flexible splints in lateral luxation and root fractures. PMC12094451
Das S et al. (2023) - "Management of Laterally Luxated Primary Teeth: A Case Report." Cureus. 2023;15(2):e35218. PMID 36968882 - Composite resin flexible splinting for lateral luxation, good outcome
Di Giorgio G et al. (2021) - "Root Fracture and Extrusive Luxation in Primary Teeth." Dent J (Basel). 2021;9(9):107. PMID 34562981 - Flexible splinting for extrusive luxation + root fracture in primary tooth
Trauma to the Primary Dentition - StatPearls - NCBI Bookshelf, 2024. NBK580475

Bottom Line

Cap splints (rigid splints) are generally NOT recommended for isolated luxation injuries of primary teeth. The IADT 2020 guidelines - the gold standard reference - specify flexible splints when splinting is needed in primary dentition. Cap splints have their role in pediatric dentoalveolar and alveolar fractures, but for pure luxation injuries of primary teeth, flexible composite-wire or titanium trauma splints are the evidence-based choice. The key reason is that rigid immobilization in primary teeth increases risk of ankylosis and permanent tooth germ disturbance - outcomes that can compromise the developing permanent dentition.

Create a clinical decision flowchart for splinting primary dentition trauma

Reading File

Running Command

mkdir -p /home/daytona/workspace/cap-splint-flowchart && ls /home/daytona/worksp…

Writing File

~/cap-splint-flowchart/flowchart.py

import matplotlib
matplotlib.use('Agg')
import matplotlib.pyplot as plt
import matplotlib.patches as mpatches
from matplotlib.patches import FancyBboxPatch, FancyArrowPatch

fig, ax = plt.subplots(figsize=(22, 34))
ax.set_xlim(0, 22)
ax.set_ylim(0, 34)
ax.axis('off')

# ─── Color Palette ───────────────────────────────────────────────────────────
C_BG        = "#0D1B2A"   # deep navy  – canvas
C_TITLE     = "#1A2F4A"   # dark navy  – title banner
C_START     = "#1B6CA8"   # vivid blue – start/entry
C_DIAMOND   = "#D4870A"   # amber      – decision
C_ACTION    = "#1A7A4A"   # forest green – action/treatment
C_EXTRACT   = "#B03030"   # crimson    – extract
C_OBSERVE   = "#2E7D96"   # teal       – observe
C_SPLINT    = "#5B3A8C"   # purple     – splint indicated
C_FOOTER    = "#0D1B2A"   # same as bg
C_WHITE     = "#FFFFFF"
C_LTGRAY    = "#E8EDF2"
C_AMBER     = "#FFB830"
C_GOLD      = "#F0C040"

fig.patch.set_facecolor(C_BG)
ax.set_facecolor(C_BG)

# ─── Helper functions ─────────────────────────────────────────────────────────

def box(ax, x, y, w, h, text, facecolor, textcolor=C_WHITE, fontsize=9.5,
        bold=False, radius=0.35, style="round,pad=0.05", wrap=True, zorder=3,
        linewidth=0, edgecolor="none", alpha=1.0):
    rect = FancyBboxPatch((x - w/2, y - h/2), w, h,
                          boxstyle=f"round,pad=0.08",
                          facecolor=facecolor, edgecolor=edgecolor,
                          linewidth=linewidth, zorder=zorder, alpha=alpha)
    ax.add_patch(rect)
    weight = 'bold' if bold else 'normal'
    ax.text(x, y, text, ha='center', va='center', fontsize=fontsize,
            color=textcolor, fontweight=weight, wrap=True,
            multialignment='center', zorder=zorder+1,
            linespacing=1.35)

def diamond(ax, x, y, w, h, text, facecolor=C_DIAMOND, textcolor=C_WHITE, fontsize=9):
    xs = [x, x + w/2, x, x - w/2, x]
    ys = [y + h/2, y, y - h/2, y, y + h/2]
    ax.fill(xs, ys, color=facecolor, zorder=3)
    ax.plot(xs, ys, color="#FFC95A", linewidth=1.2, zorder=4)
    ax.text(x, y, text, ha='center', va='center', fontsize=fontsize,
            color=textcolor, fontweight='bold', multialignment='center',
            zorder=5, linespacing=1.3)

def arrow(ax, x1, y1, x2, y2, color="#90AFCC", lw=1.8, label="", label_side="right"):
    ax.annotate("", xy=(x2, y2), xytext=(x1, y1),
                arrowprops=dict(arrowstyle="-|>", color=color,
                                lw=lw, mutation_scale=14),
                zorder=2)
    if label:
        mx = (x1+x2)/2
        my = (y1+y2)/2
        offset = 0.22 if label_side == "right" else -0.22
        ax.text(mx + offset, my, label, ha='center', va='center',
                fontsize=8, color=C_GOLD, fontweight='bold', zorder=6)

def line(ax, x1, y1, x2, y2, color="#90AFCC", lw=1.8):
    ax.plot([x1, x2], [y1, y2], color=color, lw=lw, zorder=2)

# ─── TITLE BANNER ─────────────────────────────────────────────────────────────
title_bg = FancyBboxPatch((0.2, 32.3), 21.6, 1.5,
                           boxstyle="round,pad=0.1",
                           facecolor=C_TITLE, edgecolor=C_AMBER, linewidth=2, zorder=3)
ax.add_patch(title_bg)
ax.text(11, 33.15, "Clinical Decision Flowchart: Splinting in Primary Dentition Trauma",
        ha='center', va='center', fontsize=15, color=C_WHITE, fontweight='bold', zorder=4)
ax.text(11, 32.6, "Based on IADT 2020 Guidelines  |  Dental Traumatology 2020;36(4):343–359",
        ha='center', va='center', fontsize=8.5, color=C_GOLD, zorder=4)

# ─── ENTRY ────────────────────────────────────────────────────────────────────
box(ax, 11, 31.5, 7.5, 0.7,
    "PRIMARY TOOTH TRAUMA PRESENTED",
    C_START, bold=True, fontsize=11, edgecolor=C_AMBER, linewidth=1.5)

arrow(ax, 11, 31.15, 11, 30.55)

# ─── Step 1: Assess type ──────────────────────────────────────────────────────
box(ax, 11, 30.2, 8, 0.65,
    "Clinical + Radiographic Assessment\n(Type of Traumatic Dental Injury)",
    "#1A3A5C", fontsize=9.5, bold=False, edgecolor="#3A7ABF", linewidth=1)

arrow(ax, 11, 29.87, 11, 29.25)

diamond(ax, 11, 28.7, 9, 1.05,
        "What type of injury?", C_DIAMOND, fontsize=10)

# ─── Six branches from diamond ────────────────────────────────────────────────
# Positions (x) for six injury columns
cols = {
    "concussion":  2.0,
    "sublux":      4.8,
    "extrusion":   7.6,
    "lateral":    11.0,
    "intrusion":  14.4,
    "root_fx":    17.2,
    "alv_fx":     20.2,
}

y_label   = 27.65
y_injbox  = 26.95
y_q1      = 26.00
y_action1 = 25.05
y_splint  = 24.15
y_type    = 23.25
y_dur     = 22.35

branch_color = "#90AFCC"
label_color  = "#FFFFFF"

# ── draw horizontal distribution line ──
line(ax, 2.0, 28.18, 20.2, 28.18, color="#90AFCC")
for cx in cols.values():
    line(ax, cx, 28.18, cx, 27.95, color="#90AFCC")
    ax.annotate("", xy=(cx, 27.95), xytext=(cx, 28.18),
                arrowprops=dict(arrowstyle="-|>", color="#90AFCC", lw=1.5, mutation_scale=12), zorder=2)

# ─── CONCUSSION ──────────────────────────────────────────────────────────────
cx = cols["concussion"]
box(ax, cx, 27.5, 3.4, 0.65, "CONCUSSION", "#1A5276", bold=True, fontsize=9, edgecolor="#3A7ABF", linewidth=1)
arrow(ax, cx, 27.18, cx, 26.6)
box(ax, cx, 26.3, 3.4, 0.55, "Normal mobility\nNo displacement", "#1A3A5C", fontsize=8)
arrow(ax, cx, 26.02, cx, 25.42)
box(ax, cx, 25.15, 3.4, 0.52, "Observation only\nNo splinting", C_OBSERVE, fontsize=8.5, bold=True, edgecolor="#5BC0D0", linewidth=1)
arrow(ax, cx, 24.89, cx, 24.29)
box(ax, cx, 24.0, 3.4, 0.52, "F/U: 1 wk, 6-8 wks", "#1A3A5C", fontsize=8)

# ─── SUBLUXATION ─────────────────────────────────────────────────────────────
cx = cols["sublux"]
box(ax, cx, 27.5, 3.4, 0.65, "SUBLUXATION", "#1A5276", bold=True, fontsize=9, edgecolor="#3A7ABF", linewidth=1)
arrow(ax, cx, 27.18, cx, 26.6)
box(ax, cx, 26.3, 3.4, 0.55, "Increased mobility\nNo displacement", "#1A3A5C", fontsize=8)
arrow(ax, cx, 26.02, cx, 25.42)
box(ax, cx, 25.15, 3.4, 0.52, "Observation only\nNo splinting", C_OBSERVE, fontsize=8.5, bold=True, edgecolor="#5BC0D0", linewidth=1)
arrow(ax, cx, 24.89, cx, 24.29)
box(ax, cx, 24.0, 3.4, 0.52, "F/U: 1 wk, 6-8 wks", "#1A3A5C", fontsize=8)

# ─── EXTRUSIVE LUXATION ──────────────────────────────────────────────────────
cx = cols["extrusion"]
box(ax, cx, 27.5, 3.4, 0.65, "EXTRUSIVE\nLUXATION", "#1A5276", bold=True, fontsize=9, edgecolor="#3A7ABF", linewidth=1)
arrow(ax, cx, 27.17, cx, 26.6)
diamond(ax, cx, 26.1, 3.4, 0.85, "Displacement\n> 3 mm?", C_DIAMOND, fontsize=8)
# YES → extract
arrow(ax, cx + 1.7, 26.1, cx + 2.4, 26.1, color="#FF6B6B")
ax.text(cx + 2.0, 26.22, "YES", ha='center', va='bottom', fontsize=7.5, color="#FF6B6B", fontweight='bold')
box(ax, cx + 3.05, 26.1, 1.55, 0.52, "EXTRACT", C_EXTRACT, fontsize=8.5, bold=True)
# NO → observe/spontaneous
arrow(ax, cx, 25.67, cx, 25.12)
ax.text(cx + 0.18, 25.42, "NO", ha='left', va='center', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx, 24.85, 3.4, 0.52, "Allow spontaneous\nre-eruption", C_OBSERVE, fontsize=8, bold=True, edgecolor="#5BC0D0", linewidth=1)
arrow(ax, cx, 24.59, cx, 24.04)
diamond(ax, cx, 23.65, 3.4, 0.72, "Unstable after\nrepositioning?", C_DIAMOND, fontsize=7.5)
# YES splint
arrow(ax, cx, 23.29, cx, 22.74)
ax.text(cx + 0.18, 23.05, "YES", ha='left', va='center', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx, 22.45, 3.4, 0.55, "Flexible splint\n2-3 weeks", C_SPLINT, fontsize=8.5, bold=True, edgecolor="#A080D0", linewidth=1)
# NO
arrow(ax, cx - 1.7, 23.65, cx - 2.45, 23.65, color="#FF6B6B")
ax.text(cx - 2.05, 23.78, "NO", ha='center', va='bottom', fontsize=7.5, color="#FF6B6B", fontweight='bold')
box(ax, cx - 2.9, 23.65, 1.4, 0.52, "Observe", C_OBSERVE, fontsize=8)

# ─── LATERAL LUXATION ────────────────────────────────────────────────────────
cx = cols["lateral"]
box(ax, cx, 27.5, 3.4, 0.65, "LATERAL\nLUXATION", "#1A5276", bold=True, fontsize=9, edgecolor="#3A7ABF", linewidth=1)
arrow(ax, cx, 27.17, cx, 26.6)
diamond(ax, cx, 26.1, 3.4, 0.85, "Occlusal\ninterference?", C_DIAMOND, fontsize=8)
# NO → spontaneous
arrow(ax, cx - 1.7, 26.1, cx - 2.45, 26.1, color="#FF6B6B")
ax.text(cx - 2.05, 26.22, "NO", ha='center', va='bottom', fontsize=7.5, color="#FF6B6B", fontweight='bold')
box(ax, cx - 3.05, 26.1, 1.55, 0.55, "Spontaneous\nReposition", C_OBSERVE, fontsize=7.5)
# YES → reposition
arrow(ax, cx, 25.67, cx, 25.12)
ax.text(cx + 0.18, 25.42, "YES", ha='left', va='center', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx, 24.85, 3.4, 0.52, "Reposition gently\nunder LA", C_ACTION, fontsize=8.5, bold=True, edgecolor="#40BF7A", linewidth=1)
arrow(ax, cx, 24.59, cx, 24.04)
diamond(ax, cx, 23.65, 3.4, 0.72, "Still unstable?", C_DIAMOND, fontsize=8)
# YES splint
arrow(ax, cx, 23.29, cx, 22.74)
ax.text(cx + 0.18, 23.05, "YES", ha='left', va='center', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx, 22.45, 3.4, 0.55,
    "FLEXIBLE SPLINT\n4 weeks (IADT 2020)", C_SPLINT, fontsize=8.5, bold=True, edgecolor="#A080D0", linewidth=1.5)
# NO
arrow(ax, cx + 1.7, 23.65, cx + 2.5, 23.65, color="#FF6B6B")
ax.text(cx + 2.05, 23.78, "NO", ha='center', va='bottom', fontsize=7.5, color="#FF6B6B", fontweight='bold')
box(ax, cx + 3.05, 23.65, 1.5, 0.52, "Observe", C_OBSERVE, fontsize=8)

# ─── INTRUSION ────────────────────────────────────────────────────────────────
cx = cols["intrusion"]
box(ax, cx, 27.5, 3.4, 0.65, "INTRUSIVE\nLUXATION", "#1A5276", bold=True, fontsize=9, edgecolor="#3A7ABF", linewidth=1)
arrow(ax, cx, 27.17, cx, 26.6)
diamond(ax, cx, 26.1, 3.4, 0.85, "Apex toward\ntooth bud?", C_DIAMOND, fontsize=8)
# YES → extract
arrow(ax, cx, 25.67, cx, 25.12)
ax.text(cx + 0.18, 25.42, "YES", ha='left', va='center', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx, 24.85, 3.4, 0.52, "EXTRACT\n(protect tooth germ)", C_EXTRACT, fontsize=8, bold=True)
# NO → observe
arrow(ax, cx + 1.7, 26.1, cx + 2.45, 26.1, color="#90AFCC")
ax.text(cx + 2.05, 26.22, "NO", ha='center', va='bottom', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx + 2.95, 26.1, 1.55, 0.55, "Observe\nspontaneous\nre-eruption", C_OBSERVE, fontsize=7.5)
arrow(ax, cx, 24.59, cx, 24.02)
box(ax, cx, 23.72, 3.4, 0.55, "NO splinting\nMonitor 1-6 months", C_OBSERVE, fontsize=8.5, bold=True, edgecolor="#5BC0D0", linewidth=1)

# ─── ROOT FRACTURE ────────────────────────────────────────────────────────────
cx = cols["root_fx"]
box(ax, cx, 27.5, 3.4, 0.65, "ROOT\nFRACTURE", "#1A5276", bold=True, fontsize=9, edgecolor="#3A7ABF", linewidth=1)
arrow(ax, cx, 27.17, cx, 26.6)
diamond(ax, cx, 26.1, 3.4, 0.85, "Coronal fragment\nmobile / displaced?", C_DIAMOND, fontsize=7.8)
# YES
arrow(ax, cx, 25.67, cx, 25.12)
ax.text(cx + 0.18, 25.42, "YES", ha='left', va='center', fontsize=7.5, color=C_GOLD, fontweight='bold')
diamond(ax, cx, 24.75, 3.4, 0.72, "Apical fragment\nstable?", C_DIAMOND, fontsize=7.8)
arrow(ax, cx - 1.7, 24.75, cx - 2.45, 24.75)
ax.text(cx - 2.05, 24.87, "NO", ha='center', va='bottom', fontsize=7.5, color="#FF6B6B", fontweight='bold')
box(ax, cx - 2.95, 24.75, 1.55, 0.52, "Extract\ncoronal Fx", C_EXTRACT, fontsize=7.5, bold=True)
arrow(ax, cx, 24.39, cx, 23.84)
ax.text(cx + 0.18, 24.15, "YES", ha='left', va='center', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx, 23.55, 3.4, 0.55, "Flexible splint\n4 weeks\n(high success rate)", C_SPLINT, fontsize=8, bold=True, edgecolor="#A080D0", linewidth=1)
# NO
arrow(ax, cx + 1.7, 26.1, cx + 2.45, 26.1)
ax.text(cx + 2.05, 26.22, "NO", ha='center', va='bottom', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx + 2.95, 26.1, 1.55, 0.55, "Observe\nno splint\nneeded", C_OBSERVE, fontsize=7.5)

# ─── ALVEOLAR FRACTURE ────────────────────────────────────────────────────────
cx = cols["alv_fx"]
box(ax, cx, 27.5, 3.4, 0.65, "ALVEOLAR\nFRACTURE", "#1A5276", bold=True, fontsize=9, edgecolor="#3A7ABF", linewidth=1)
arrow(ax, cx, 27.17, cx, 26.6)
box(ax, cx, 26.3, 3.4, 0.55, "Displaced segment?\nOcclusal interference?", "#1A3A5C", fontsize=8)
arrow(ax, cx, 26.02, cx, 25.45)
box(ax, cx, 25.15, 3.4, 0.55, "Reposition segment\nunder LA", C_ACTION, fontsize=8.5, bold=True, edgecolor="#40BF7A", linewidth=1)
arrow(ax, cx, 24.87, cx, 24.29)
box(ax, cx, 24.0, 3.4, 0.7,
    "SPLINT to adjacent\nuninjured teeth\n4 weeks (IADT 2020)",
    C_SPLINT, fontsize=8.5, bold=True, edgecolor="#A080D0", linewidth=1.5)
arrow(ax, cx, 23.65, cx, 23.1)
diamond(ax, cx, 22.75, 3.4, 0.72, "Cap Splint\navailable?", C_DIAMOND, fontsize=8)
arrow(ax, cx, 22.39, cx, 21.84)
ax.text(cx + 0.18, 22.15, "YES", ha='left', va='center', fontsize=7.5, color=C_GOLD, fontweight='bold')
box(ax, cx, 21.55, 3.4, 0.55, "Cap Splint + CMW\n(Rigid - acceptable\nfor alveolar Fx)", "#6A3A9C", fontsize=8, bold=True, edgecolor="#C080FF", linewidth=1.5)
arrow(ax, cx - 1.7, 22.75, cx - 2.45, 22.75)
ax.text(cx - 2.05, 22.87, "NO", ha='center', va='bottom', fontsize=7.5, color="#FF6B6B", fontweight='bold')
box(ax, cx - 2.95, 22.75, 1.55, 0.55, "Composite\nwire splint\n(flexible)", C_SPLINT, fontsize=7.5)

# ─── BOTTOM COMMON CONVERGENCE: SPLINT TYPE GUIDANCE ─────────────────────────
y_guide = 20.2
guide_bg = FancyBboxPatch((0.5, 19.1), 21, 1.7,
                           boxstyle="round,pad=0.1",
                           facecolor="#0F2A45", edgecolor=C_AMBER, linewidth=1.5, zorder=3)
ax.add_patch(guide_bg)
ax.text(11, 20.65, "SPLINT SELECTION GUIDE FOR PRIMARY DENTITION",
        ha='center', va='center', fontsize=10, color=C_AMBER, fontweight='bold', zorder=4)

splint_data = [
    ("FLEXIBLE SPLINTS\n(IADT Recommended)", "Composite-wire\nTitanium Trauma Splint\nOrthodontic wire + resin",
     "Lateral luxation\nRoot fracture\nExtrusion (if needed)", "#5B3A8C"),
    ("RIGID SPLINTS\n(Limited use)", "Cap Splint (acrylic/cast metal)\nVacuum-formed splint + GIC\nComposite resin alone",
     "Alveolar fracture\nMultiple luxated teeth\n+ alveolar segment Fx", "#7A2C2C"),
    ("NOT INDICATED", "No splint required",
     "Concussion\nSubluxation\nIntrusion\nAvulsion (no reimplant)", "#2C5A3A"),
]
col_w = 6.5
start_x = 1.3
for i, (title, splints, when, color) in enumerate(splint_data):
    bx = start_x + i * col_w + col_w/2
    bx_rect = FancyBboxPatch((start_x + i * col_w, 17.25), col_w - 0.3, 1.65,
                              boxstyle="round,pad=0.07",
                              facecolor=color, edgecolor=C_AMBER, linewidth=1, zorder=3, alpha=0.9)
    ax.add_patch(bx_rect)
    ax.text(bx - 0.15, 18.67, title, ha='center', va='top', fontsize=8.5, color=C_WHITE,
            fontweight='bold', zorder=4, multialignment='center', linespacing=1.3)
    ax.text(bx - 0.15, 18.18, splints, ha='center', va='center', fontsize=7.5, color=C_LTGRAY,
            zorder=4, multialignment='center', linespacing=1.25)

ax.text(1.3 + 0*col_w + col_w/2 - 0.15, 17.5, "When?", ha='center', va='center', fontsize=7,
        color=C_GOLD, zorder=4)

# ─── DURATION TABLE ───────────────────────────────────────────────────────────
dur_y = 16.9
dur_bg = FancyBboxPatch((0.5, 14.8), 21, 1.95,
                         boxstyle="round,pad=0.1",
                         facecolor="#0A1E32", edgecolor="#3A7ABF", linewidth=1.2, zorder=3)
ax.add_patch(dur_bg)
ax.text(11, 16.55, "SPLINTING DURATION — IADT 2020 Primary Dentition Guidelines",
        ha='center', va='center', fontsize=9.5, color=C_GOLD, fontweight='bold', zorder=4)

dur_data = [
    ("Lateral Luxation\n(if splinted)",   "4 weeks", "Flexible"),
    ("Root Fracture\n(if splinted)",       "4 weeks", "Flexible"),
    ("Alveolar Fracture",                  "4 weeks", "Flexible / Cap Splint"),
    ("Extrusive Luxation\n(if unstable)",  "2-3 weeks", "Flexible"),
    ("Concussion / Subluxation",           "No splint", "—"),
    ("Intrusive Luxation",                 "No splint", "—"),
    ("Avulsion",                           "No reimplant", "—"),
]
col_xs = [2.2, 7.5, 12.0, 16.5]
headers = ["Injury Type", "Duration", "Splint Type", "Cap Splint?"]
cap_splint_yn = ["NO", "NO", "YES*", "NO", "—", "—", "—"]
for j, h in enumerate(headers):
    ax.text(col_xs[j], 16.05, h, ha='center', va='center', fontsize=8.5,
            color=C_AMBER, fontweight='bold', zorder=4)
ax.plot([0.7, 21.3], [15.78, 15.78], color="#3A7ABF", lw=0.8, zorder=4)
for i, (inj, dur, spl) in enumerate(dur_data):
    row_y = 15.55 - i * 0.28
    bg_c = "#0D243A" if i % 2 == 0 else "#0A1E32"
    row_rect = FancyBboxPatch((0.7, row_y - 0.13), 20.6, 0.27,
                               boxstyle="square,pad=0.0",
                               facecolor=bg_c, edgecolor="none", zorder=3)
    ax.add_patch(row_rect)
    ax.text(col_xs[0], row_y, inj.replace("\n", " "), ha='center', va='center',
            fontsize=7.2, color=C_WHITE, zorder=4)
    ax.text(col_xs[1], row_y, dur, ha='center', va='center',
            fontsize=7.5, color=C_WHITE, fontweight='bold', zorder=4)
    ax.text(col_xs[2], row_y, spl, ha='center', va='center',
            fontsize=7.2, color=C_LTGRAY, zorder=4)
    yn_color = "#70FF90" if cap_splint_yn[i] == "YES*" else ("#FF7070" if cap_splint_yn[i] == "NO" else C_LTGRAY)
    ax.text(col_xs[3], row_y, cap_splint_yn[i], ha='center', va='center',
            fontsize=8, color=yn_color, fontweight='bold', zorder=4)

# ─── FOLLOW-UP PROTOCOL BOX ───────────────────────────────────────────────────
fu_bg = FancyBboxPatch((0.5, 12.0), 10.1, 2.55,
                        boxstyle="round,pad=0.08",
                        facecolor="#0F2A45", edgecolor="#3A7ABF", linewidth=1.2, zorder=3)
ax.add_patch(fu_bg)
ax.text(5.55, 14.35, "FOLLOW-UP SCHEDULE", ha='center', va='center',
        fontsize=9, color=C_GOLD, fontweight='bold', zorder=4)
fu_items = [
    "1 week  — Clinical exam after repositioning/splinting",
    "4 weeks — Splint removal (if splint used)",
    "6-8 weeks — Clinical assessment of healing",
    "6 months — Check for complications",
    "1 year  — Radiographic check",
    "Age 6+  — Monitor permanent tooth eruption",
]
for i, item in enumerate(fu_items):
    ax.text(0.9, 14.0 - i * 0.35, f"•  {item}", ha='left', va='center',
            fontsize=7.8, color=C_LTGRAY, zorder=4)

# ─── COMPLICATION BOX ─────────────────────────────────────────────────────────
cx_comp = 16.0
comp_bg = FancyBboxPatch((10.8, 12.0), 10.7, 2.55,
                          boxstyle="round,pad=0.08",
                          facecolor="#1A0A0A", edgecolor="#B03030", linewidth=1.2, zorder=3)
ax.add_patch(comp_bg)
ax.text(cx_comp, 14.35, "WATCH FOR COMPLICATIONS", ha='center', va='center',
        fontsize=9, color="#FF8080", fontweight='bold', zorder=4)
comp_items = [
    "Pulp necrosis / abscess (darkening of crown)",
    "Pathological external root resorption",
    "Ankylosis (over-rigid / prolonged splinting)",
    "Developmental disturbance to permanent tooth",
    "Enamel hypoplasia of successor (Turner tooth)",
    "Failure of splint / loss of retention",
]
for i, item in enumerate(comp_items):
    ax.text(11.1, 14.0 - i * 0.35, f"⚠  {item}", ha='left', va='center',
            fontsize=7.8, color="#FFB0B0", zorder=4)

# ─── KEY PRINCIPLES BOX ───────────────────────────────────────────────────────
kp_bg = FancyBboxPatch((0.5, 10.0), 21, 1.75,
                        boxstyle="round,pad=0.1",
                        facecolor="#0A1E14", edgecolor="#1A7A4A", linewidth=1.5, zorder=3)
ax.add_patch(kp_bg)
ax.text(11, 11.57, "KEY PRINCIPLES FOR SPLINTING PRIMARY TEETH",
        ha='center', va='center', fontsize=9.5, color="#70E090", fontweight='bold', zorder=4)
principles = [
    "1  Use FLEXIBLE splints when splinting is indicated in primary dentition (IADT 2020)",
    "2  Cap splints (rigid) are acceptable ONLY for alveolar fractures or complex multi-segment injuries",
    "3  AVOID rigid splinting for pure luxation injuries — increases ankylosis + permanent tooth germ risk",
    "4  PRIMARY teeth are NOT reimplanted after avulsion",
    "5  Shorter splinting duration in children (2-4 wks) vs adults — rapid healing + TMJ ankylosis risk",
    "6  Protect permanent tooth bud — this is the PRIMARY GOAL in all primary dentition trauma management",
]
for i, p in enumerate(principles[:3]):
    ax.text(0.8, 11.22 - i*0.32, p, ha='left', va='center', fontsize=7.5, color=C_LTGRAY, zorder=4)
for i, p in enumerate(principles[3:]):
    ax.text(0.8, 10.25 - i*0.32 + 0.32, p, ha='left', va='center', fontsize=7.5, color=C_LTGRAY, zorder=4)

# ─── REFERENCES ───────────────────────────────────────────────────────────────
ref_bg = FancyBboxPatch((0.5, 8.35), 21, 1.45,
                         boxstyle="round,pad=0.08",
                         facecolor="#0D1B2A", edgecolor="#304A6A", linewidth=1, zorder=3)
ax.add_patch(ref_bg)
ax.text(11, 9.6, "KEY REFERENCES", ha='center', va='center',
        fontsize=8.5, color=C_GOLD, fontweight='bold', zorder=4)
refs = [
    "1.  Malmgren B et al. IADT Guidelines — Injuries in the Primary Dentition. Dental Traumatology 2020;36(4):343-359. doi:10.1111/edt.12576",
    "2.  Fernandez MDS et al. Splinting in the management of dental trauma in the primary dentition: systematic review. Eur Arch Paediatr Dent 2023. PMID 36930443",
    "3.  Deery C. Should we splint traumatised primary teeth? Evid Based Dent 2023;24(3):118-119. PMID 37433924",
    "4.  Adverse effects of splinting of luxated primary teeth: SR. PMC12094451  |  5.  Das S et al. Management of Laterally Luxated Primary Teeth. Cureus 2023. PMID 36968882",
]
for i, r in enumerate(refs):
    ax.text(0.8, 9.35 - i*0.26, r, ha='left', va='center', fontsize=7, color="#A0B8CC", zorder=4)

# ─── LEGEND ───────────────────────────────────────────────────────────────────
legend_items = [
    (C_DIAMOND, "Decision point"),
    (C_ACTION,  "Clinical action"),
    (C_SPLINT,  "Splinting indicated"),
    (C_OBSERVE, "Observe / no splint"),
    (C_EXTRACT, "Extract tooth"),
    ("#6A3A9C",  "Cap splint (rigid)"),
]
lx, ly = 0.7, 7.85
ax.text(lx, ly, "LEGEND:", ha='left', va='center', fontsize=8, color=C_GOLD, fontweight='bold', zorder=4)
for i, (color, label) in enumerate(legend_items):
    bx = lx + 1.5 + i * 3.2
    rect = FancyBboxPatch((bx, ly - 0.2), 0.45, 0.38,
                           boxstyle="round,pad=0.04",
                           facecolor=color, edgecolor="none", zorder=3)
    ax.add_patch(rect)
    ax.text(bx + 0.6, ly - 0.01, label, ha='left', va='center',
            fontsize=8, color=C_WHITE, zorder=4)

# ─── ASTERISK NOTE ────────────────────────────────────────────────────────────
ax.text(0.7, 7.3,
        "* Cap splint acceptable for alveolar fractures. CMW = Circummandibular Wiring. "
        "GIC = Glass Ionomer Cement. IADT = International Association of Dental Traumatology.",
        ha='left', va='center', fontsize=7.5, color="#88A0B8",
        style='italic', zorder=4)

# ─── BORDER ───────────────────────────────────────────────────────────────────
border = FancyBboxPatch((0.05, 0.05), 21.9, 33.9,
                         boxstyle="round,pad=0.1",
                         facecolor="none", edgecolor=C_AMBER, linewidth=2.5, zorder=1)
ax.add_patch(border)

plt.tight_layout(pad=0)
plt.savefig("/home/daytona/workspace/cap-splint-flowchart/primary_dentition_splinting_flowchart.png",
            dpi=180, bbox_inches='tight', facecolor=C_BG)
print("Saved successfully.")

Running Command

cd /home/daytona/workspace/cap-splint-flowchart && python flowchart.py 2>&1

Running Command

ls -lh /home/daytona/workspace/cap-splint-flowchart/

Your clinical decision flowchart is ready. Here is the download link:

primary dentition splinting flowchart

Image · PNG

Here is what the flowchart covers across its 7 injury-specific branches and 5 reference panels:

Top Section - Decision Branches (one per injury type):

Branch	Key Decision	Outcome
Concussion	No displacement	Observe - no splint
Subluxation	Increased mobility only	Observe - no splint
Extrusive Luxation	>3mm? → Extract; unstable after reposition?	Flexible splint 2-3 wks
Lateral Luxation	Occlusal interference? → Reposition → still unstable?	Flexible splint 4 wks
Intrusive Luxation	Apex toward tooth bud?	Extract or observe
Root Fracture	Coronal fragment mobile? → Apical stable?	Flexible splint 4 wks
Alveolar Fracture	Segment displaced? → Reposition → Cap splint available?	Cap splint + CMW accepted

Bottom Reference Panels:

Splint selection guide - flexible vs rigid vs not indicated
IADT 2020 duration table with cap splint YES/NO column
Follow-up schedule (1 wk to age 6+)
Complications watch list (pulp necrosis, ankylosis, Turner tooth)
6 key principles for primary dentition trauma
Full references including IADT 2020 and PMID numbers

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