Topic map

1. Definition, objectives, indications, and contraindications
2. Etiology and classification of loss of tooth structure
3. Diagnosis and comprehensive examination
4. Diagnostic casts, face-bow transfer, articulators, and diagnostic wax-up
5. Occlusal concepts and vertical dimension
6. Treatment planning and phased sequence of treatment
7. Endodontic considerations in FMR
8. Restorative considerations: direct restorations, inlays/onlays, crowns, veneers
9. Management of worn dentition, including the Dahl concept
10. Management of bruxism and temporomandibular disorders
11. Provisional restorations and definitive rehabilitation
12. Post-treatment maintenance, complications, and prognosis

High-level overview

Full Mouth Rehabilitation in Conservative Dentistry and Endodontics

Introduction

• Preservation of sound enamel, dentin, and pulp
• Control of the cause of tooth destruction
• Restoration of function, esthetics, and comfort
• Establishment of a stable, harmonious occlusion
• Appropriate endodontic treatment and restoration of compromised teeth
• Long-term maintenance and prevention of recurrence

Definition

1. Optimum oral health
2. Functional efficiency
3. Esthetics
4. Occlusal stability
5. Patient comfort
6. Long-term maintainability

Objectives of Full Mouth Rehabilitation

Biological objectives

• Eliminate caries and defective restorations.
• Control erosive, abrasive, and parafunctional causes of tooth surface loss.
• Maintain pulp vitality where feasible.
• Perform endodontic treatment only when indicated.
• Establish healthy periodontal tissues.
• Preserve maximum sound tooth structure.
• Ensure adequate ferrule and coronal seal in endodontically treated teeth.

Functional objectives

• Establish stable centric relation and centric occlusion.
• Restore vertical dimension when truly lost or when space is required.
• Provide comfortable mastication and speech.
• Establish an acceptable occlusal plane.
• Achieve appropriate anterior guidance and posterior disclusion during excursions.
• Reduce damaging occlusal interferences.

Esthetic objectives

• Improve tooth form, color, alignment, incisal display, smile line, and gingival harmony.
• Restore facial support and lower facial height where deficient.
• Achieve acceptable tooth proportions and incisal edge positions.

Psychological objectives

• Improve patient confidence and comfort.
• Address expectations realistically.
• Achieve an outcome that the patient can maintain financially and hygienically.

Indications

1. Generalized pathological tooth wear
   • Attrition
   • Erosion
   • Abrasion
   • Abfraction or stress-related cervical lesions
   • A combination of these processes
2. Severely broken-down dentition
   • Extensive caries
   • Multiple failed restorations
   • Fractured cusps or teeth
   • Generalized loss of coronal tooth structure
3. Severe erosive tooth wear
   • Gastroesophageal reflux disease
   • Recurrent vomiting or eating disorders
   • Frequent acidic beverage intake
   • Occupational acid exposure
4. Parafunctional habits
   • Bruxism
   • Clenching
   • Nail biting
   • Pipe smoking or other habitual tooth loading
5. Occlusal derangements
   • Reduced or altered vertical dimension
   • Collapsed bite due to tooth loss and migration
   • Loss of posterior support
   • Deep bite with palatal wear
   • Severe anterior wear with loss of anterior guidance
6. Developmental and structural anomalies
   • Amelogenesis imperfecta
   • Dentinogenesis imperfecta
   • Hypoplastic enamel
   • Fluorosis with severe esthetic and structural compromise
7. Multiple endodontically treated teeth requiring definitive coronal rehabilitation
8. Extensive esthetic rehabilitation, provided biological and functional requirements are first met.

Contraindications

• The patient has poor oral hygiene and is unwilling to improve it.
• Active periodontal disease is uncontrolled.
• Caries activity is uncontrolled.
• The etiologic factor, such as erosion, bruxism, or xerostomia, remains uncontrolled.
• The patient is unable or unwilling to attend multiple visits and maintenance appointments.
• The patient has unrealistic esthetic expectations.
• There is inadequate periodontal support with poor prognosis for multiple teeth.
• There is a severe uncontrolled temporomandibular disorder or acute muscle pain.
• Financial limitations preclude a predictable long-term plan.
• The clinician cannot provide adequate diagnostic planning, provisionalization, laboratory communication, and follow-up.

Etiology of Tooth Surface Loss

1. Attrition

Causes

• Physiological mastication
• Bruxism
• Clenching
• Malocclusion
• Loss of posterior support
• Parafunctional habits

Clinical features

• Flat, shiny wear facets
• Matching facets on opposing teeth
• Shortened clinical crowns
• Fractured cusps or restorations
• Muscle tenderness in parafunction
• Loss of anterior guidance

2. Erosion

Extrinsic sources

• Citrus fruits and fruit juices
• Carbonated beverages
• Sports drinks
• Vinegar-containing foods
• Occupational acid exposure
• Frequent swimming in chlorinated pools

Intrinsic sources

• Gastroesophageal reflux disease
• Regurgitation
• Chronic vomiting
• Bulimia nervosa
• Pregnancy-associated vomiting

Clinical features

• Smooth, silky, glazed appearance
• Cupping of occlusal surfaces
• Concavities on enamel and dentin
• Broad shallow lesions
• Palatal erosion of maxillary teeth in intrinsic acid exposure
• Hypersensitivity

3. Abrasion

Causes

• Improper toothbrushing technique
• Abrasive dentifrice
• Toothpicks
• Holding objects between teeth
• Occupational habits
• Improper use of interdental cleaning aids

Features

• V-shaped or wedge-shaped cervical defects
• Often present on canines and premolars
• May be associated with gingival recession

4. Abfraction

5. Caries and failed restorations

Classification of Severely Worn Dentition

Category III subgroups

• III A: Space may be gained by orthodontic movement.
• III B: Space may be gained by restorative alteration of tooth position.
• III C: Space may be gained by surgical crown lengthening.

Diagnosis and Examination

1. History

Chief complaint

• Esthetics
• Pain
• Sensitivity
• Difficulty in chewing
• Repeated fracture of restorations
• Short teeth
• Loss of facial height
• Temporomandibular symptoms

Medical history

• Diabetes mellitus
• Hypertension and cardiovascular disease
• Bleeding disorders
• Osteoporosis medication
• Sjögren syndrome
• Gastrointestinal reflux disease
• Eating disorders
• Medication-induced xerostomia
• Allergies and drug history

Dental history

• Frequency of caries and previous restorations
• History of trauma
• Past root canal treatment
• Repeated crown or restoration failures
• Previous orthodontic treatment
• Previous occlusal splint use
• Sensitivity or spontaneous pain
• Habits such as clenching and grinding

Dietary history

• Frequency of acidic food or drink intake
• Carbonated beverage consumption
• Citrus and fruit juice use
• Alcohol use
• Timing of toothbrushing after acidic exposures

Parafunctional history

• Daytime clenching
• Night grinding
• Morning muscle fatigue
• Headache
• Waking with tooth pain
• Fractured teeth or restorations
• Reports from a sleeping partner

2. Extraoral Examination

• Facial symmetry
• Facial profile
• Lower facial height
• Lip support
• Lip competence
• Nasolabial angle
• Chin prominence
• Smile line
• Incisor visibility at rest
• Incisor display on smiling
• Temporomandibular joint tenderness, clicking, crepitus, or deviation
• Muscles of mastication for tenderness or hypertrophy

3. Intraoral Examination

Teeth

• Caries activity
• Existing restorations
• Wear pattern and severity
• Fractures and cracks
• Tooth mobility
• Pulp vitality
• Color changes
• Hypersensitivity
• Crown-root ratio
• Remaining tooth structure
• Presence of ferrule
• Endodontically treated teeth
• Non-restorable teeth

Periodontium

• Plaque and calculus
• Gingival inflammation
• Probing depths
• Clinical attachment loss
• Furcation involvement
• Mobility
• Mucogingival problems
• Width of attached gingiva
• Gingival recession
• Biologic width or supracrestal tissue attachment considerations

Occlusion

• Centric relation and maximum intercuspation discrepancy
• Existing vertical dimension
• Overjet and overbite
• Anterior guidance
• Posterior contacts
• Nonworking-side interferences
• Working-side interferences
• Occlusal plane
• Curve of Spee and Wilson
• Presence of fremitus
• Presence or absence of posterior support

4. Radiographic Examination

• Periapical radiographs of suspected teeth
• Bitewing radiographs for caries and crestal bone
• Orthopantomogram for general overview
• Cone-beam CT only if required for specific endodontic, periodontal, surgical, or implant-related questions

• Periapical status
• Quality of previous root canal treatment
• Root morphology and length
• Bone level
• Root fractures
• Caries extent
• Remaining dentin thickness
• Crown-root ratio
• Furcation status
• Presence of resorption or calcification

5. Diagnostic Casts and Articulator Mounting

Uses

• Analyze arch form and tooth position.
• Evaluate occlusal plane.
• Identify wear facets and interferences.
• Assess restorative space.
• Plan diagnostic wax-up.
• Plan occlusal scheme.
• Communicate with the dental laboratory.
• Fabricate provisional matrices and guides.

Procedure

1. Make accurate maxillary and mandibular impressions or digital scans.
2. Obtain face-bow transfer where indicated.
3. Record centric relation.
4. Mount casts on a semi-adjustable articulator.
5. Perform diagnostic analysis and wax-up.

Diagnostic Wax-up

Advantages

• Determines feasibility of restoration.
• Assesses restorative space.
• Guides planned changes in tooth form and position.
• Helps assess esthetics and incisal edge position.
• Allows planning of anterior guidance and occlusal contacts.
• Forms the basis for mock-up and provisional restorations.
• Helps patient understand the expected result.
• Reduces irreversible tooth preparation.

Occlusal Concepts in Full Mouth Rehabilitation

Centric relation

• Bimanual manipulation
• Leaf gauge
• Lucia jig
• Anterior deprogrammer
• Occlusal splint-assisted deprogramming

Centric occlusion

Occlusal schemes

1. Mutually protected occlusion

• Posterior teeth support the bite in centric closure.
• Anterior teeth guide mandibular excursions.
• Posterior teeth disclude in protrusive and lateral movements.
• Canines ideally provide canine guidance.

2. Canine-protected occlusion

3. Group function

4. Balanced occlusion

Vertical Dimension

Definitions

Vertical dimension at rest (VDR)

Vertical dimension of occlusion (VDO)

Interocclusal rest space or freeway space

Important Principle

Indications for Increasing VDO

• There is confirmed loss of VDO.
• Adequate restorative space cannot be obtained at the existing VDO.
• Esthetics require increased incisal length and facial support.
• There is insufficient space for restoration of worn anterior teeth.
• A planned occlusal scheme requires it.
• The patient has been tested successfully with splint therapy or provisional restorations.

Methods to Assess VDO

1. Facial appearance and lower facial height
2. Interocclusal rest space
3. Phonetics
4. Esthetics and incisal display
5. Swallowing position
6. Facial proportions
7. Pre-treatment photographs or old records
8. Diagnostic wax-up
9. Mounted casts
10. Trial with removable occlusal splint
11. Trial with fixed provisional restorations

Phonetic assessment

• During pronunciation of “s” sounds, there should be appropriate closest speaking space without tooth collision.
• During pronunciation of “f” and “v” sounds, maxillary incisal edges should contact the wet-dry junction of the lower lip appropriately.

Trial Increase in VDO

Sequence

1. Determine tentative VDO from diagnostic records.
2. Fabricate an occlusal splint or overlay.
3. Allow an adaptation period.
4. Assess pain, speech, mastication, muscle fatigue, joint symptoms, and esthetics.
5. Transfer the accepted VDO into provisional restorations.
6. Monitor provisionals before definitive treatment.

Endodontic Considerations in Full Mouth Rehabilitation

Objectives

• Maintain vital pulp where possible.
• Diagnose pulpal and periapical disease accurately.
• Provide predictable root canal treatment where indicated.
• Establish a sound coronal seal.
• Ensure adequate coronal tooth structure for definitive restoration.
• Avoid unnecessary posts and excessive radicular dentin removal.

Indications for Endodontic Treatment

• Irreversible pulpitis
• Pulp necrosis
• Symptomatic apical periodontitis
• Asymptomatic apical periodontitis
• Pulp exposure during caries excavation or tooth preparation when vital pulp therapy is unsuitable
• Previous inadequate root canal treatment with apical pathology
• Need for post retention in a tooth with insufficient coronal retention, provided the tooth is otherwise restorable
• Intentional endodontic treatment in selected cases only, after considering the biological cost

Pre-endodontic Restoration

• Caries removal
• Removal of old restorations
• Matrix band placement
• Composite or glass ionomer build-up
• Isolation with rubber dam
• Establishment of a stable reference point
• Prevention of irrigant leakage and coronal contamination

Restoring Endodontically Treated Teeth

Principles

1. Preserve remaining tooth structure.
2. Achieve an adequate coronal seal.
3. Provide cuspal coverage for posterior teeth with extensive structural loss.
4. Establish ferrule where a crown is planned.
5. Use a post only when necessary to retain the core.
6. Do not place a post to “strengthen” the tooth.

Ferrule effect

• Orthodontic extrusion
• Surgical crown lengthening
• Margin relocation in selected adhesive cases
• Extraction and replacement if prognosis is poor

Post and core

Indications for a post

• Inadequate coronal tooth structure for core retention
• Need to retain a core in a severely broken-down tooth

Types

• Fiber-reinforced composite post
• Cast metal post and core
• Prefabricated metal post
• Ceramic post, now less commonly used

Principles of post placement

• Retain at least 4 to 5 mm of apical gutta-percha for apical seal.
• Preserve maximum radicular dentin.
• Avoid excessive post diameter.
• Avoid weakening roots by aggressive canal enlargement.
• Use adhesive procedures carefully with strict isolation.
• Ensure the post is passive and does not create wedging stresses.

Treatment Planning

Principles of treatment planning

• Etiology-oriented
• Biologically acceptable
• Conservative
• Functionally stable
• Esthetically acceptable
• Financially realistic
• Maintainable by the patient
• Based on prognosis of each tooth

Sequence of Full Mouth Rehabilitation

Phase I: Emergency and disease-control phase

1. Relieve pain and acute infection.
2. Drain abscess where needed.
3. Perform emergency endodontic treatment if indicated.
4. Extract hopeless teeth.
5. Treat acute periodontal conditions.
6. Remove gross caries.
7. Place temporary restorations.
8. Institute oral hygiene measures.
9. Provide dietary counseling.
10. Manage sensitivity.
11. Begin bruxism and erosion control.

Phase II: Initial periodontal and endodontic phase

1. Scaling and root planing.
2. Oral hygiene reinforcement.
3. Caries control.
4. Definitive endodontic therapy where indicated.
5. Endodontic retreatment or apical surgery where appropriate.
6. Core build-ups.
7. Periodontal reevaluation.
8. Assessment of tooth prognosis.

Phase III: Diagnostic and reversible phase

1. Obtain diagnostic casts or digital scans.
2. Record centric relation.
3. Mount casts on an articulator.
4. Plan diagnostic wax-up.
5. Establish proposed occlusal scheme.
6. Assess VDO.
7. Perform intraoral mock-up.
8. Use occlusal splint therapy where required.
9. Confirm patient adaptation to proposed changes.
10. Reassess esthetics, phonetics, function, and comfort.

Phase IV: Definitive restorative phase

1. Perform crown lengthening or orthodontic extrusion if required.
2. Complete restorations in a planned sequence.
3. Use minimally invasive restorations wherever possible.
4. Establish stable posterior contacts.
5. Develop anterior guidance.
6. Check excursive movements carefully.
7. Cement or bond definitive restorations.
8. Make a protective occlusal splint when indicated.

Phase V: Maintenance phase

1. Review after 1 week if needed.
2. Review at 3 months, 6 months, and then periodically.
3. Reinforce oral hygiene and diet counseling.
4. Check periodontal health.
5. Check for recurrent caries.
6. Examine marginal integrity and restoration fracture.
7. Reassess occlusion.
8. Adjust or remake occlusal splint as needed.
9. Monitor endodontically treated teeth radiographically where indicated.

Restorative Options in FMR

1. Direct composite restorations

Indications

• Mild to moderate wear
• Additive increase in incisal or occlusal height
• Young patients
• Transitional or trial rehabilitation
• Financial limitations
• High need for repairability

Advantages

• Conservative
• Adhesive
• Repairable
• Relatively inexpensive
• Can be completed chairside
• Useful for testing increased VDO

Limitations

• Wear, staining, chipping, and fracture can occur.
• Technique-sensitive.
• May require maintenance in bruxism.

2. Indirect composite or ceramic onlays

Indications

• Posterior teeth with cuspal loss
• Moderate to extensive occlusal wear
• Need for cuspal coverage
• Need to preserve sound axial walls

Advantages

• Conservative compared with full crowns
• Better control of occlusal anatomy
• Improved strength and wear resistance
• Can be bonded adhesively

3. Veneers

Indications

• Anterior esthetic correction
• Palatal erosion with preserved facial enamel
• Incisal edge lengthening
• Mild to moderate anterior wear

Advantages

• Conservative
• Excellent esthetics
• High bond strength when enamel is preserved

4. Full-coverage crowns

Indications

• Teeth with extensive coronal destruction
• Endodontically treated teeth with major loss of tooth structure
• Teeth requiring full cuspal coverage where partial coverage is unsuitable
• Teeth with large existing restorations and inadequate remaining walls

Disadvantages

• Greater removal of tooth structure
• Increased pulpal risk in vital teeth
• Difficult repair
• Greater biological cost

The Dahl Concept

Principle

Indications

• Localized anterior tooth wear
• Palatal wear of maxillary anterior teeth
• Deep bite
• Limited restorative space
• Good periodontal health
• Cooperative patient

Contraindications

• Unstable periodontal condition
• Severe generalized tooth wear requiring full-arch rehabilitation
• Unreliable patient
• Temporomandibular pain requiring careful assessment

Advantages

• Conservative
• May avoid crown lengthening or extensive tooth preparation
• Preserves tooth structure
• Can create space for anterior restorations

Management of Bruxism in FMR

Management

1. Explain the condition to the patient.
2. Identify and modify daytime clenching behavior.
3. Evaluate stress and sleep history.
4. Use a hard stabilization splint where appropriate.
5. Establish a stable occlusal scheme.
6. Avoid thin, unsupported restorations in high-load areas.
7. Use material thickness appropriate to the planned restoration.
8. Schedule regular maintenance.
9. Repair minor failures early before they become extensive.

Management of Erosion

Preventive measures

• Identify intrinsic and extrinsic acid sources.
• Refer for medical management of reflux disease.
• Refer suspected eating disorders appropriately and sensitively.
• Reduce frequency of acidic food and drink intake.
• Avoid swishing acidic drinks.
• Use a straw when appropriate.
• Rinse with water after acidic exposure.
• Avoid immediate toothbrushing after acid exposure.
• Use fluoridated toothpaste and remineralizing strategies.
• Manage xerostomia when present.
• Review diet and symptoms regularly.

Provisional Restorations

Functions

• Protect prepared teeth.
• Maintain pulpal health.
• Maintain tooth position.
• Maintain periodontal health.
• Test VDO.
• Test occlusion.
• Test esthetics and phonetics.
• Test anterior guidance.
• Allow patient adaptation.
• Provide a blueprint for definitive restorations.

Occlusal Adjustment at Delivery

1. Centric contacts
2. Simultaneous bilateral posterior contacts
3. No premature contact in centric relation
4. Appropriate anterior guidance
5. Canine guidance or planned group function
6. Posterior disclusion in protrusion
7. Absence of nonworking-side interferences
8. Smooth functional pathways
9. Patient comfort during chewing and speaking

Complications of Full Mouth Rehabilitation

Biological complications

• Pulpal inflammation or necrosis
• Postoperative sensitivity
• Recurrent caries
• Periodontal inflammation
• Loss of attachment
• Endodontic failure
• Root fracture
• Periapical pathology

Mechanical complications

• Fracture of restoration
• Chipping of ceramic
• Wear of composite
• Debonding
• Loss of retention
• Post fracture
• Core fracture
• Tooth fracture
• Occlusal splint fracture

Functional complications

• Muscle fatigue
• Temporomandibular discomfort
• Difficulty in speech
• Cheek or tongue biting
• Difficulty in mastication
• Occlusal instability
• Patient dissatisfaction with esthetics

Prevention

• Correct diagnosis
• Conservative tooth preparation
• Accurate records
• Proper articulator mounting
• Diagnostic wax-up
• Adequate provisional phase
• Precise laboratory communication
• Proper isolation during adhesive procedures
• Thorough occlusal adjustment
• Control of bruxism and erosion
• Regular recall and maintenance

Summary Flowchart

History and examination
        ↓
Control etiology: caries, periodontal disease, erosion, bruxism
        ↓
Radiographs, diagnostic casts, photographs, vitality tests
        ↓
Centric relation record and articulator mounting
        ↓
Assess VDO, restorative space, esthetics, and prognosis
        ↓
Diagnostic wax-up and intraoral mock-up
        ↓
Endodontic, periodontal, orthodontic, or surgical preparation as needed
        ↓
Occlusal splint and/or provisional rehabilitation
        ↓
Confirm comfort, function, phonetics, and esthetics
        ↓
Definitive conservative restorations
        ↓
Occlusal splint, recalls, and maintenance

Conclusion

Preserve sound tooth structure and pulp whenever possible, restore only what is necessary, establish stable function, and control the cause of destruction before definitive rehabilitation.