Comparative evaluation of impact strength of fragment bonded teeth and intact teeth: an in vitro study

Background: To test and compare the impact strength of fragment bonded teeth with that of intact teeth by using impact testing machine (pendulum type) as a mode of load.

Materials and methods: Forty extracted, maxillary, central incisors selected for this study (20 control group and 20 experimental group). In experimental group, teeth crowns were fractured with a microtome at 2.5 mm from mesioincisal angle cervically, fractured portion is attached to original crown portion with 3 M single bond dentin bonding agent and 3 M Z '100', composite resin. Impact strength of fragment bonded teeth and intact teeth tested with impact testing machine and compared.

Results: Mean impact strength of fragment bonded teeth (30.76 KJ/M(2) ) is not statistically significant deferent from mean impact strength of intact teeth (31.11 KJ/M(2) ).

Conclusion: Mean impact strength of fragment bonded teeth is not statistically different with that of intact teeth. Hence, after fracture of teeth if it is restored with fragment reattachment by using 3 M single bond dentin bonding agent and 3 M Z '100' composite resin is having impact strength like that of intact teeth. How to cite the article: Venugopal L, Lakshmi MN, Babu DA, Kiran VR. Comparative evaluation of impact strength of fragment bonded teeth and intact teeth: An in vitro study. J Int Oral Health 2014;6(3):73-6.