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A STUDY ON EVALUATION OF THE BEST METHOD TO DECONTAMINATE THE TOOTH-RESIN INTERFACE

Dr Fatima Syed, Dr Seemal Ahmed, Dr Faiza Farooq

Introduction: Clinically, saliva contamination is a problem when new increments of composite are necessary to improve the contour of restorations after the rubber dam is removed. Aims and objectives: The main objective of the study is to analyse the best method to decontaminate the tooth-resin interface among local population of Pakistan. Material and methods: This cross sectional study was conducted in THQ Hospital, Fortabbas during December 2018 to July 2019. This study was done with the permission of ethical committee of hospital. The specimens were randomly allocated in five groups (n = 30). One group was assigned to be the control and it was not submitted to any contamination or surface treatment. Consequently, these specimens represented the cohesive strength of the material. The four remaining experimental groups had the top surface of the composite resin contaminated with fresh human saliva. Results: The analysis of variance detected significant differences for the surface treatments (p < 0.001) and the storage condition (p < 0.001). An interaction effect was also found between the surface treatments and storage condition (p < 0.001). As variances were not homogeneous, Dunnett T3 test was performed. Regarding the surface treatments, the highest bond strength was registered for the control group, in which no surface treatment and no contamination with saliva were performed. Conclusion: It is concluded that if contamination with saliva occurs during the insertion of composite resin, an effective decontamination of the surface must be performed to improve the adhesive strength between resin-resin increments.

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