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Assessment of a Conservative Approach for Restoration of Extensively Destroyed Posterior Teeth

Assessment of a Conservative Approach for Restoration of Extensively Destroyed Posterior Teeth

José Mondelli, Fabio Antonio Piola Rizzante, Fabiano Bassalobre Valera, Renato Roperto, Rafael Francisco Lia Mondelli, Adilson Yoshio Furuse

J Appl Oral Sci. 2019 Aug 12;27:e20180631.

PMID: 31411263

Abstract:

Objective:
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.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
IAR42413257	KGF human			Price

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