Pengaruh penyemprotan ekstrak bunga rosella dan larutan sodium hipoklorit terhadap stabilitas dimensi cetakan polivinil siloksan

Introduction: Polyvinyl siloxane (PVS) is an elastomeric impression material that is often used in dentistry. American Dental Association (ADA) recommends disinfection of impression materials to reduce cross contamination. The disinfection technique recommended by the Centers for Disease Control and Prevention is spraying. Which can reduce the risk of changing dimensions of the mold. This study aims to determine the effect of spraying roselle flower extract 40% and sodium hypochlorite solution on the dimensional stability of polyvinyl siloxane molds. Methods : The type of research used was experimental laboratory. Samples obtained using Federer formula from the stainless-steel stem models in the form of 2 crowns were prepared with a height/occlusogingival of 8.02 mm, diameter/buccolingual was 6.33 mm, distance between 2 abutments teeth was 28.25 mm. The total sample of 30 samples consisted of groups without spraying, with spraying roselle flower extract 40% and spraying sodium hypochlorite 0.5%, each group consisted of 10 samples taken through purposive sampling technique with Federer formula. Results: There was an effect of spraying roselle flower extract 40% and 0.5% sodium hypochlorite solution seen from buccolingual, occlusogingival, and interpreparation of dimensional stability with a p value= 0.0001 (p<0.05). The LSD test showed no difference in effect between spraying roselle flower extract and sodium hypochlorite on dimensional stability with p value from buccolingual was 0.164 (p>0.05), p value of occlusogingival was 0.056 (p> 0.05), and p value of interpreparation was 0.053 (p> 0.05). Conclusion: 40% roselle flower extract and 0.5% sodium hypochlorite solution can be used as an alternative to disinfect polyvinyl siloxane impression materials with changes in dimensional stability that can still be tolerated because it was still below 0.05%.