Evaluation of fracture resistance and mode of failure of premolars restored with nanohybrid composite, ORMOCER and ceramic inlays

Publication date: Available online 1 September 2017
Source:Journal of Oral Biology and Craniofacial Research
Author(s): Mohit. K. Gunwal, Pratima R. Shenoi, Tanvee Paranjape, Sonal Dhote, Ravish Tongya, Magesh Kumar, Sanjay Rastogi
ObjectivesTo evaluate the fracture resistance and mode of failure of maxillary premolars restorations restored with nanohybrid Composite, ORMOCER and Ceramic Inlays.Materials and method100 extracted first maxillary premolar were collected. Samples were divided into five groups. Group I – Intact premolars, Group II –MOD cavities without restorations, Group III – MOD cavities restored with composite restoration, GROUP IV – MOD cavities restored with ORMOCER restoration and GROUP V – MOD cavities restored with ceramic inlays. All the samples were sent for the axial compression test under the universal testing machine. Fracture resistance and fracture modes were recorded.ResultHighest fracture resistance was achieved in Group V (1324.74±336.78) almost comparable to that of natural tooth (1381.07±259.36) (p<0.05), followed by Group IV (MOD cavities with ORMOCER restorations) (1082.27±351.27) (p<0.01) and least fracture resistance in Group III (MOD cavities with composite restorations) (778.35±100.25) (p<0.0001). Mode of fracture in Group IV and Group V are almost similar and In Group III 65% of the cases showed non-restorable fractures.ConclusionORMOCER fracture resistance along with other groups of clinically restorable fracture stand better than Nanohybrid composite.Clinical RelevanceBased on the present study, the dentist can utilize the ORMOCER material as a restoration material for the cavities of posterior teeth which is better in terms of fracture resistance and durability of the restoration when compare to nanohybrid composite.



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