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ANALYSIS OF EFFECT OF DIFFERENT CLEANSING AGENTS AND ADHESIVE RESINS ON BOND STRENGTH OF CONTAMINATED ZIRCONIA

Dr Muhammad Usman, Dr Sonera Noor, Dr Anum Mansoor

Introduction: The performance and longevity of indirect restorations can be affected by several factors, such as preparation design/coarseness, provisional luting agent, cleansing protocol, fit of the definitive restoration, and type of the definitive luting agent. Aims and objectives: The basic aim of the study is to analyse the effect of different cleansing agents and adhesive resins on bond strength of contaminated zirconia. Material and methods: This descriptive study was conducted in Punjab Dental Hospital, Lahore during January 2019 to July 2019. The data was collected from both male and female patients. All specimens were then sintered in ceramic and zirconia sintering furnaces according to the manufacturers’ firing instructions. A total of 100 cylindirical specimens with a diameter of 1mm and 3mm height were obtained from a composite resin. Subsequently, ceramic and composite resin specimens were ultrasonically cleaned in ethanol series and deionized water for 15 min, respectively. Surfaces of all specimens were wetpolished with 800-grit silicon carbide paper. Results: The data was collected from 100 patients. Mean SBS values for E ceramic group were observed as C:14,9±6, S1:12,1±6,9, S2:19,4±7,2 and S3:19,5±7,5 while for Z group, 7,3±10,7, 15,7±4,8, 17,3±5,5, and 17,1±7,3, respectively (P>.05). EX ceramic surface cleaning with S3 regimen resulted in significantly higher SBS values than C, S1 and S2. Conclusion: It is concluded that cleaning application on lithium disilicate saliva-contaminated ceramic surface had a significant influence on resin-ceramic bond strength increase.

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