In Vitro Comparative Analysis Of Fracture Resistance Using Different Adhesive Materials & Preparations On Reattached Tooth Fragments

• Published in: International journal of contemporary dentistry Vol. 2; no. 3
• Main Authors: Gurlal Singh Brar, Jindal, Ritu, Mahajan, Sandeep, RaviSher Singh Toor
• Format: Journal Article
• Language: English
• Published: Bangalore Incessant Nature Science Publishers Private Limited 01.05.2011
• ISSN: 2229-3493; 2229-3507

Aim: The aim of this study was to investigate the influence of different adhesive materials & different preparations on fracture resistance of reattached tooth fragments. Material and Methods: 170 sound extracted human permanent incisors were selected.10 teeth were maintained as a control group and remaining 160 teeth were divided equally and randomly into four groups(n=40) based upon the materials used for reattachment. Each group were further divided into four sub-groups(n=10) on basis of different preparations. The specimens were fractured & reattached by different adhesives after doing different preparations, and then the specimens were thermocycled in between +5oC and +55oC for 150 cycles. All specimens were subjected to test in a universal testing Machine (Instron) at the cross-head speed of 0.5mm/min. The fracture resistance was calculated in Mega-Pascals by dividing force (Newton) with the surface area (sqmm2) of the fractured surface. Different preparations were compared using independent samples 't' test for two groups. For more than two groups, One-Way Anova and Bonferroni post hoc test was applied. Results: When different preparations were compared by using same material, statistically significant difference was found between all preparations except between chamfer & stair step-chamfer(p > 0.05).On the other hand, when preparation was kept same and different materials were compared, a significant difference was found between all materials with bevel & reverse bevel preparations. In chamfer & stair-step chamfer preparations, statistically significant difference was found between all materials except between compomer & composite and dual-cure resin cement &resin modified G.I.C(p > 0.05).Conclusions:Compomer showed maximum resistance to fracture when chamfer preparation was used but neither the different preparations nor the different materials were able to attain the fracture resistance obtained from intact teeth. The best fracture resistance was about 50 % of intact teeth.