Authors: Sorensen JA, Martinoff JT.
Title: Intracoronal reinforcement and coronal coverage: a study of endodontically treated teeth.
Journal: J Prosthet Dent
Date: Jun 1984
Citation: 51(6):780-4
Category: Prosthodontic-Endodontic Relationships
Evidence-based Ranking: 4
Purpose/Objectives: To correlate clinical and laboratory studies of 1273 endodontically treated teeth in retrospect and determine the clinical significance of post reinforcement and coronal coverage.

Materials and Methods: Over 6000 records of nine general dentists were examined for teeth than had endodontic therapy. The following data was collected for analysis; arch position, coronal coverage, and intracoronal reinforcement. 1273 endodontically treated teeth were selected after exclusions for periodontal involvement and recurrent decay. The definition of clinical success was based on the absence of dislodgement, fractures, vertical root fractures, and root perforation. Results: Max Ant- no significant difference (84-89%), Max Premolars- significant difference with coronal coverage (56% to 94%), Max Molars- significant difference with coronal coverage (50% to 94%) Mand Ant-no significant difference (94-97%), Mand Premolars- significant difference with coronal coverage (62% to 93%), Mand Molars-significant difference with coronal coverage (62% to 94%).

AuthorÂ’s Conclusions: 1.There was no significant increase in resistance to fracture or dislodgement gained with intracoronal reinforcement for the six anatomic groups of teeth. 2. Coronal coverage did not significantly improve the rate of clinical success for maxillary and mandibular anterior teeth. 3. The rate of clinical success was significantly improved with coronal coverage of maxillary and mandibular premolars and molars.

ReviewerÂ’s Comments: Good in vivo look at success/failure on restoring endodontically treated teeth. Hard to determine if teeth excluded were actually removed for the reasons stated, or a long-standing vertical root fracture could appear as a periodontally involved tooth in the records.