AN EVALUATION OF MICRO LEAKAGE UNDER COMPLETE METAL CROWNS USING 3 DIFFERENT LUTING AGENTS

AN INVITRO STUDY

Abstract

To evaluate the microleakage at tooth cement surface and cement metal interface.
Aim: To evaluate the microleakage under complete metal crowns using three different commercially available luting agents
Setting and Design: A total of 60 samples were prepared of these 20 samples were prepared to evaluate the microleakage under complete metal crowns using Glass Ionomer cement (3M ESPETMKetacCem), another 20 for resin-modified glass ionomer cement (GC India) and remaining 20 samples for resin cement (3M ESPETMRelyX U200).
Material and Method: 60 intact extracted human premolars of similar dimensions were prepared (1mm) with chamfer finish line and a flat occlusal surface. The samples were randomly divided into 3 groups. Grouping was based on the different cements for luting used. Each group was also randomly subdivided into two subgroups depending upon interface i.e.teeth cement and metal cement interface. One hour after cementation, all the samples were for 24 hrs in water at room temperature, followed by thermocycling. Each thermocycling consisted of alternate immersion of sample in water bath maintained at 5° and 55° C. The samples were immersed in 5% solution of indigo carmine dye for 72hours. The sample were sectioned and were studied under Optical Microscope at 100x magnification. The extent of microleakage was indicated by the dye penetration on both the interface i.e. metal cement (MC) surface and tooth cement (TC) interface.
Statistical Analysis used: Kruskal Wallis test and Mann Whitney U test.
Result: Range of microleakage score of Group I was from 2 to 4.Range of the microleakage score of Group II was from 1 to 3. Range of microleakage score of Group III was from 0 to 3.
Conclusion: The present in vitro study was conducted and on the basis of results, observations and statistical analysis, the following conclusions were drawn that between three groups, Glass ionomer cement recorded maximum combined microleakage amongst three cements irrespective of the interfaces.