TOOTH PREPARATION WITH HIGH C-FACTOR UTILIZING VARIOUS METHODS AND MICROLEAKAGE

Abstract

Introduction Composite Resins have been used for nearly 50 years and year after year improvements have been made regarding their composition and their handling properties. The use of this material has been continually increasing because of ability to bond to dental structure, its high aesthetics and conservative preparation. Aims And Objectives A. Evaluation of the marginal microleakage of Class-I cavity preparations (i.e. high C-factor preparation) restored with different composite placement techniques. B. Find the composite placement technique which is able to eliminate marginal microleakage in tooth preparations with high C-factor Methodology 120 human premolar teeth , recently extracted, free from caries should not have other structural defects. A. Materials: Normal saline, Self-etch Adhesive system, Nano-hybrid composite Distilled water, Enamel varnish, Selfcure acrylic resin, 0.5% solution of Methylene blue dye, B. Armamentarium: Airotor handpeice. Micromotor Contrangle handpeice. C. Equipment used: LED Curing light, Thermocycling machine, Stereomicroscope Observations And Results The microleakage scores for the six different resin composite placement techniques. The score was subjected to Kruskal-Wallis test for the comparison among the six experimental groups (P< 0.05, it indicates significant difference. it indicates highly significant difference among different groups. But here P=0.16 this indicates no statically significant difference among the six groups. On comparing Group I with Group VI, the P value is = 0.52, so the difference is not statistically significant. On comparing Group II with Group VI, the P value was = 0.52, which is more than 0.05, so the difference is not statistically significant. On comparing group III with Group VI, the P value was = 0.20 so the difference is not statistically significant. On comparing Group IV with Group VI, the P value was = 0.75, so the difference is not statistically significant. On comparing Group V with Group VI, the P value was 0.11, which is more than 0.05, so the difference is not statically significant. Conclusion Within the limits of the present study concluded that, none of the techniques for resin placement was able to eliminate marginal microleakage in Class-I cavity preparation. The complete control of marginal microleakage in tooth preparation with high C-factor still presents a challenge