Assessment of a conservative approach for restoration of extensively destroyed posterior teeth
J. appl. oral sci
; 27: e20180631, 2019. tab, graf
Article
in En
| LILACS, BBO
| ID: biblio-1012520
Responsible library:
BR1.1
ABSTRACT
Abstract Extensive restorations in posterior teeth always bring doubts to the clinicians regarding the best protocol, mainly when structures of reinforcement were lost. Objective This study aimed to evaluate the effect of beveling on the fracture resistance and pattern of class II (MOD) restored teeth. Methodology Ninety human premolars were randomly assigned into 9 groups CTR (control/sound); NC (cavity preparation, non-restored); RU (restored, unbeveled); RTB (restored, entire angle beveling); RPB (restored, partial/occlusal beveling); EC (endodontic access/EA, non-restored); EU (EA, unbeveled); ETB (EA, entire angle beveling); EPB (EA, partial/occlusal beveling). Teeth were restored with Esthet X resin composite and stored in distilled water for 24 h before the inclusion in PVC cylinders. The axial loading tests were performed with 500 kgF at 0.5 mm/min crosshead speed until fracture of the specimens. Fracture resistance and pattern were accessed and data were analyzed using one-way ANOVA and Tukey's HSD test (α=0.05). Results Mean (±SD) failure loads ranged from 136.56 (11.62) to 174.04 (43.5) kgF in the groups tested without endodontic access. For endodontically accessed teeth, fracture resistance ranged from 95.54 (13.05) to 126.51 (19.88) kgF. Beveling of the cavosurface angle promoted the highest fracture resistance values (p<0.05) and prevented catastrophic fractures. Conclusions Cavosurface angle beveling is capable of improving fracture resistance and pattern for both endodonticaly accessed and non-accessed teeth.
Key words
Full text:
1
Collection:
01-internacional
Database:
BBO
/
LILACS
Main subject:
Bicuspid
/
Dental Cavity Preparation
/
Dental Restoration, Permanent
Type of study:
Clinical_trials
/
Etiology_studies
/
Evaluation_studies
/
Guideline
/
Risk_factors_studies
Limits:
Humans
Language:
En
Journal:
J. appl. oral sci
Journal subject:
ODONTOLOGIA
Year:
2019
Document type:
Article
Affiliation country:
Brazil
/
United States
Country of publication:
Brazil