FRACTURE RESISTANCE OF CORONAL FRACTURE FRAGMENT REATTACHMENT VS DIFFERENT COMPOSITE RESTORATIONS IN ANTERIOR CROWN FRACTURES- AN IN VITRO STUDY

Abstract

Introduction: Esthetics is prime concern for all ages, especially for teenager, adolescent, puberty to young adults. At these ages, there is high risk of fracture of anterior teeth reported in the literature. Various methods are used for esthetic correction of these fractured teeth. This article focuses on fracture resistance of reattachment (of fracture fragment) Vs composite build-up and their comparative evaluation.

 Aim and objectives: To evaluate and compare the fracture resistance of four different restorative techniques including reattachment with dual- cure resin cement and micro- hybrid composite resin and restorative composite build- up with micro- hybrid and nano- hybrid composites.

 Materials and method: Fifty sound caries- free human maxillary central incisors were selected for the study (n=50). Control group: Group I: Intact teeth fractured directly with a Universal Testing Machine. Experimental group: Group II: Reattachment of fractured fragment with dual- cure resin cement with an internal dentinal groove preparation.

Group III: Reattachment of fractured fragment using micro-hybrid composite with an internal dentinal groove preparation.

Group IV: Composite build- up of fractured teeth with micro-hybrid composite with an enamel bevel preparation.

Group V: Composite build- up of fractured teeth with nano-hybrid composite with an enamel bevel preparation

 Result: Group V in experiment group showed highest fracture resistance while group II showed lowest.

 Summary and conclusion: The fracture resistance of teeth restored by two different reattachment techniques showed highly statistically significant difference. Reattachment with micro-hybrid composite (29.02 ± 2.55 KgF) attained higher fracture resistance than reattachment with dual-cure resin cement (20.00 ± 3.01KgF). The fracture resistance of teeth restored by two different composite build up techniques showed no statistically significant difference. Composite build- up with nano- hybrid composite (40.90 ± 3.86 KgF) attained higher fracture resistance than micro- hybrid composite (39.21 ± 4.00 KgF). None of the experimental group showed comparable fracture resistance to that of control group(43.72+_9.15KgF)