OBJECTIVES: The aim of the present investigation was to study the influence of a reduced bone support on the @entity174 resistance of endodontically treated @entity4500 restored with glass fibre-reinforced posts (FRC). METHODS: 30 caries-free maxillary central incisors were divided into 3 groups (n=10). Endodontic treatment was performed. Teeth were flattened 2 mm above the cemento-enamel junction. Group I (control) simulated a clinical situation without horizontal @entity604 . In group II a horizontal @entity604 of 25% and in group III of 50% was simulated. All specimens received FRC posts and composite core restorations. All-ceramic crowns were adhesively cemented. Specimens were exposed to thermal cycling and mechanical loading (TCML) and finally statically loaded until failure in a universal testing machine (v=1 mm/min). Non-parametric tests were used to compare median @entity174 loads between groups. @entity174 modes were compared using Fisher's exact test. RESULTS: The median @entity174 load values (min/max) in [N] were: group I=501 (326/561), group II=422 (323/495); group III=352 (266/406), p=0.004. Two specimens in each group II and III failed during TCML. Statistical analysis revealed statistically significant differences between all test groups regarding maximum @entity174 load and mode of @entity174 . CONCLUSIONS: The @entity174 resistance of endodontically treated @entity4500 restored adhesively with a FRC post, composite core, and all-ceramic crown is dependent on the level of surrounding supporting periodontal bone. Loss of @entity604 due to @entity2520 may lead to an increased risk of failure.

The effect of XXXX on the load capability of restored endodontically treated teeth: a comparative in vitro study.

@entity4500 :: ('MESH:D014071', 'Disease') :: ['teeth'] @entity604 :: ('MESH:D016301', 'Disease') :: ['alveolar bone loss', 'bone loss'] @entity2520 :: ('MESH:D010510', 'Disease') :: ['periodontal disease'] @entity174 :: ('MESH:D050723', 'Disease') :: ['Fracture', 'fracture']
@entity604 :: (MESH:D016301,Disease) :: ['alveolar bone loss']
