Journal of Conservative Dentistry
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ARTICLE
Year : 2007  |  Volume : 10  |  Issue : 4  |  Page : 134-140

Association between microtensile bond strength and microleakage at the resin based composite/dentin interface - an in vitro study


Department of Conservative Dentistry and Endodontics, J.S.S Dental College and Hospital, S.S Nagar, Mysore- 570015, India

Correspondence Address:
Shilpa K Elizabeth
Department of Conservative Dentistry and Endodontics, J.S.S Dental College and Hospital, S.S Nagar, Mysore- 570015
India
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Source of Support: None, Conflict of Interest: None


DOI: 10.4103/0972-0707.43036

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Background and objective : True adhesion has been the 'holy grail' of restorative dentistry. Iftrue adhesion of restorative materials to tooth structure is to be achieved, optimal retention must be obtained and microleakage must be prevented. This study was conducted to evaluate the correlation between microtensile bond strength and microleakage using two different adhesives systems, which differed in their mode of adhesion. Method : Box type Class I occlusal cavities were prepared on twenty molar teeth. The teeth were assigned to two groups Group I (Gluma Comfort Bond and Charisma), Group 11 (i-Bond and Charisma), each comprising of ten teeth. Restored teeth were subjected to thermocycling, followed by dye immersion and sectioning. Microleakage evaluation for the extreme end slices was done using dye immersion technique and then viewed under stereomicroscope. Microtensile bond strength testing of the middle two slices was done using an Universal Testing Machine (Instron). Results : Statistically, Group I showed higher microtensile bond strength and lower microleakage value when compared to Group 11. A highly significant negative correlation was found between microtensile bond strength and microleakage. Interpretation and conclusion Smear layer removing adhesive system exhibited higher bond strength and less leakage than smear layer dissolving adhesive system. An inverse relationship exits between microtensile bond strength and microleakage.


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