Post and core restoration of endodontically treated teeth

Area of Science:

• Dental materials science
• Restorative dentistry
• Endodontics

Background:

• Tooth strength is influenced by multiple factors.
• Endodontic treatment's effect on tooth structure is a key consideration in restorative decisions.

Purpose of the Study:

• To review the multifactorial nature of tooth strength after endodontic treatment.
• To evaluate the efficacy and safety of various post and core materials and systems.
• To provide evidence-based recommendations for restoring endodontically treated teeth.

Main Methods:

• Comprehensive literature review of studies on tooth strength, endodontic treatment, and restorative materials.
• Analysis of clinical and laboratory evidence supporting or refuting specific post and core systems.
• Evaluation of biomechanical principles related to post placement and restoration.

Main Results:

• Endodontic treatment alone does not compromise the strength of intact anterior teeth.
• Posterior teeth consistently require full-coverage restorations for protection.
• Amalgam and composite post-and-core restorations are supported by literature; glass ionomer systems are not.
• Passive, parallel-sided posts (e.g., Para-Post) cemented with zinc phosphate or composite resin are recommended.
• Threaded, dentin-retained posts that induce stress should be avoided.

Conclusions:

• Restoration of endodontically treated anterior teeth may require post placement or full-coverage restorations.
• Full-coverage restorations offer advantages for posterior teeth and can compensate for deficiencies in some post-and-core techniques.
• Material selection and post design are critical for long-term success, emphasizing passive fit and appropriate cementation.