Various recent pulp capping agents for 10 marks . Give me from contents to conclusion in a neat elaborate exam like answer
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recent pulp capping agents calcium silicate MTA Biodentine systematic review 2024
Reading Article
PMID: 40886932
Reading Article
PMID: 38956856
Reading Web Page
https://pmc.ncbi.nlm.nih.gov/articles/PMC12831176
Various Recent Pulp Capping Agents
Contents
- Introduction
- Ideal requirements of a pulp-capping agent
- Recent pulp-capping agents
- Comparison
- Conclusion
1. Introduction
Pulp capping is a vital pulp therapy procedure in which a biocompatible material is placed over an exposed pulp or a thin layer of remaining dentin close to the pulp, with the aim of preserving pulp vitality, promoting healing, and inducing reparative dentin formation.
- Indirect pulp capping: Material is placed over affected dentin remaining near the pulp, without actual pulp exposure.
- Direct pulp capping: Material is placed directly over a small, controlled pulp exposure.
Traditionally, calcium hydroxide was regarded as the gold standard. However, its poor seal, solubility, tunnel defects in dentin bridges, and lack of adhesion led to the development of modern bioactive calcium silicate-based materials.
2. Ideal Requirements of a Pulp-Capping Agent
An ideal material should be:
- Biocompatible and non-toxic to pulp cells
- Antibacterial or bacteriostatic
- Capable of maintaining pulp vitality
- Able to stimulate reparative or tertiary dentin formation
- Provide an effective seal against bacterial microleakage
- Dimensionally stable and insoluble in oral fluids
- Radiopaque
- Easy to manipulate and place
- Have adequate compressive strength
- Compatible with the definitive restoration
- Should not discolor the tooth
3. Recent Pulp-Capping Agents
A. Mineral Trioxide Aggregate (MTA)
Composition
- Tricalcium silicate
- Dicalcium silicate
- Tricalcium aluminate
- Calcium sulfate
- Bismuth oxide as radiopacifier
Types
- Gray MTA
- White MTA
Mechanism of action
On hydration, MTA releases calcium hydroxide and calcium ions. The alkaline environment provides antibacterial action and promotes differentiation of pulp cells into odontoblast-like cells. These cells form a dentin bridge.
Advantages
- Excellent biocompatibility
- High alkaline pH, approximately 12.5
- Good sealing ability
- Bioactive, stimulates hydroxyapatite formation at the dentin-material interface
- Promotes formation of a thick, relatively homogeneous dentin bridge
- Less inflammation and fewer tunnel defects than calcium hydroxide
- Suitable for direct pulp capping, pulpotomy, apexogenesis, perforation repair, and root-end filling
Disadvantages
- Long setting time
- Difficult handling and sandy consistency
- Expensive
- Possibility of tooth discoloration, especially with bismuth oxide-containing products
- Washout may occur before setting
Examples
- ProRoot MTA
- MTA Angelus
- RetroMTA
- Biodentine-type alternatives
B. Biodentine
Biodentine is a newer tricalcium silicate-based dentin substitute designed to overcome some limitations of MTA.
Composition
- Powder: Tricalcium silicate, dicalcium silicate, calcium carbonate, zirconium oxide
- Liquid: Calcium chloride in an aqueous solution with a water-reducing agent
Mechanism
It releases calcium ions and creates an alkaline environment. It stimulates pulp-cell proliferation, odontoblastic differentiation, and deposition of reparative dentin. It also forms apatite deposits at the interface with dentin.
Advantages
- Excellent biocompatibility and bioactivity
- Shorter setting time than MTA, about 9-12 minutes
- Better handling properties
- Good sealing ability
- High compressive strength
- Can act as a temporary dentin substitute
- Less risk of discoloration because zirconium oxide is used as radiopacifier
- Promotes a good-quality dentin bridge
Disadvantages
- Relatively expensive
- Requires mixing in a capsule
- The material should be protected and restored appropriately for long-term durability
Uses
- Direct and indirect pulp capping
- Partial and full pulpotomy
- Deep caries management
- Apexogenesis
- Temporary dentin replacement
C. Calcium-Enriched Mixture Cement (CEM Cement)
CEM cement is a bioactive endodontic cement containing calcium compounds.
Properties
- Releases calcium hydroxide during setting
- Alkaline pH and antibacterial action
- Biocompatible
- Promotes hard-tissue formation
- Good sealing ability
- Sets in the presence of moisture
Advantages
- Shorter setting time than conventional MTA
- Good handling
- Encourages dentin bridge formation
- Can be used in direct pulp capping and pulpotomy
Limitations
- Less widely available than MTA and Biodentine
- Fewer long-term clinical studies compared with MTA
D. BioAggregate
BioAggregate is a calcium silicate-based bioceramic material.
Composition
- Tricalcium silicate
- Dicalcium silicate
- Tantalum oxide as radiopacifier
- Calcium phosphate
Advantages
- Biocompatible and bioactive
- Releases calcium ions
- Good sealing ability
- Tantalum oxide replaces bismuth oxide, thereby reducing discoloration potential
- Promotes mineralized tissue formation
Disadvantages
- Longer setting time
- Handling may be difficult
- Limited clinical evidence for routine pulp capping compared with MTA and Biodentine
E. TheraCal LC
TheraCal LC is a light-cured, resin-modified calcium silicate liner.
Composition
- Calcium silicate particles
- Resin matrix
- Radiopaque fillers
Advantages
- Easy single-paste application
- Light curing provides immediate set
- Releases calcium ions
- Useful as a protective liner in deep cavities
- Good radiopacity and handling
Disadvantages
- Presence of resin monomers may cause cytotoxicity if placed directly on pulp
- Lower calcium-ion release than pure hydraulic calcium silicate materials
- Polymerization shrinkage may affect the seal
- It is generally more appropriate for indirect pulp capping than direct pulp capping
Clinical note: It should not be considered equivalent to MTA or Biodentine for direct contact with an exposed pulp.
F. MTA Flow
MTA Flow is a flowable, powder-gel form of MTA.
Advantages
- Improved handling and delivery into small areas
- Washout resistance
- Biocompatible
- Useful where conventional MTA placement is difficult
Limitations
- Flowability may be a disadvantage in large exposures
- Long-term evidence for pulp capping is less extensive than for conventional MTA
G. Bioceramic Putty Materials
Examples include:
- EndoSequence Root Repair Material
- TotalFill BC RRM Putty
- iRoot BP Plus
These are premixed calcium silicate-based materials that set in the presence of moisture.
Advantages
- Ready-to-use and easy to handle
- Hydrophilic and moisture tolerant
- Biocompatible
- Bioactive with calcium-ion release
- Good sealing ability
- No mixing errors
Disadvantages
- Costly
- Limited direct pulp-capping evidence relative to MTA and Biodentine
- Some products have slower setting characteristics
H. Bioactive Glass
Bioactive glass contains silica, calcium, sodium, and phosphate. It can form a hydroxycarbonate apatite layer when in contact with tissue fluids.
Advantages
- Bioactive and biocompatible
- Releases calcium and phosphate ions
- May promote mineralization and dentin repair
- Antibacterial effect due to alkaline pH
Disadvantages
- Limited clinical evidence as a routine direct pulp-capping material
- Handling and sealing ability may be inferior to established calcium silicate cements
I. Platelet-Rich Fibrin (PRF)
PRF is an autologous fibrin matrix rich in platelets, leukocytes, and growth factors.
Role
Growth factors in PRF may support angiogenesis, tissue repair, pulp-cell proliferation, and odontoblastic differentiation.
Advantages
- Autologous and biocompatible
- Contains growth factors that may promote pulp healing
- Useful as a biologic scaffold
Disadvantages
- Requires blood collection and preparation
- Technique sensitive
- Limited high-quality long-term evidence
- Usually requires placement of a protective restorative material above it
Thus, PRF remains a promising biologic adjunct rather than a routine replacement for MTA or Biodentine.
4. Comparison of Important Materials
| Material | Main advantages | Main limitations | Preferred use |
|---|---|---|---|
| Calcium hydroxide | Antibacterial, inexpensive, induces dentin bridge | Soluble, poor seal, tunnel defects | Historical material, selected cases |
| MTA | Excellent seal, biocompatibility, bioactivity | Long setting time, cost, discoloration | Direct pulp capping and pulpotomy |
| Biodentine | Fast set, good handling, bioactive, low discoloration | Cost | Direct pulp capping, pulpotomy, dentin substitute |
| TheraCal LC | Light-cured, convenient | Resin-related concerns | Mainly indirect pulp capping/liner |
| CEM cement | Bioactive, good sealing, shorter setting | Less available, limited evidence | Direct pulp capping and pulpotomy |
| Bioceramic putty | Premixed, moisture tolerant, good seal | Cost, less evidence | Vital pulp therapy in selected cases |
| PRF | Growth factors, biologic healing potential | Technique sensitive, limited evidence | Adjunctive biologic material |
5. Conclusion
Recent pulp-capping materials have shifted treatment from merely covering the pulp to actively promoting pulp healing, dentin bridge formation, and long-term vitality. Among available materials, MTA and Biodentine are currently the preferred agents for direct pulp capping because of their superior biocompatibility, bioactivity, antibacterial alkaline environment, and sealing ability.
Biodentine is often preferred where a shorter setting time, better handling, and reduced discoloration risk are desired. Resin-modified calcium silicate liners such as TheraCal LC are convenient but are more suitable for indirect pulp capping than direct placement over exposed pulp. Newer bioceramics, CEM cement, bioactive glass, and PRF are promising, but require further long-term clinical evidence.
A recent network meta-analysis of 19 randomized trials found that Biodentine and MTA had higher clinical success than calcium hydroxide in direct pulp capping, although certainty of comparative rankings remains limited by study heterogeneity (Hatipoğlu et al., 2025). Success also depends on correct case selection, strict isolation, control of pulpal bleeding, and an early well-sealed definitive restoration (Gomez-Sosa et al., 2024).
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