Sunil Babu Kotha1, Ravikumar Ramakrishnaiah2, Darshan Devang Divakar2, Sree Lalita Celur3, Saad Qasim4, Jukka P Matinlinna2,5. 1. Department of Pediatric Dentistry, Riyadh Colleges of Dentistry and Pharmacy, Riyadh, Saudi Arabia. 2. Department of Dental Health, Dental Biomaterials Research Chair, King Saud University, Riyadh, Saudi Arabia. 3. Department of Oral and Maxillofacial Surgery, Princess Noura Bint Abdulrahman University, Riyadh, Saudi Arabia. 4. Department of Materials Science and Engineering, Kroto Research Institute, University of Sheffield, Sheffield, UK. 5. Department of Dental Materials Science, Faculty of Dentistry, The University of Hong Kong, Hong Kong, China.
Abstract
AIM: The aim of the present study was to evaluate the effect of chemical disinfection, autoclave, and microwave sterilization on some of the key properties of elastomers. METHODS: Five polyvinylsiloxane elastomeric impression materials were evaluated. Forty samples were fabricated from each material. The samples were randomly selected and assigned to four experimental groups with 50 samples each: group I, control; group II,chemical disinfection; group III, autoclave sterilization; and group IV, microwave sterilization. The differences in the mean values were contrasted and compared with the control group and analyzed using two-way analysis of variance (P < 0.05). RESULTS: The results showed that chemical disinfection and autoclave sterilization had no significant effect on the tensile strength and surface roughness, whereas microwave sterilization showed a statistically-significant reduction in tensile strength, and an increase in surface roughness. None of the disinfection and sterilization techniques had a significant effect on wettability. However, autoclave and microwave sterilization resulted in an increase in hydrophilicity of all the materials tested. CONCLUSION:Chemical disinfection and autoclave sterilization had no statistically-significant effect on the tested properties of elastomers, thus autoclave sterilization can be considered as an alternative and an effective mode of disinfection and sterilization to eliminate all forms of disease causing microorganisms from dental impressions.
RCT Entities:
AIM: The aim of the present study was to evaluate the effect of chemical disinfection, autoclave, and microwave sterilization on some of the key properties of elastomers. METHODS: Five polyvinylsiloxane elastomeric impression materials were evaluated. Forty samples were fabricated from each material. The samples were randomly selected and assigned to four experimental groups with 50 samples each: group I, control; group II,chemical disinfection; group III, autoclave sterilization; and group IV, microwave sterilization. The differences in the mean values were contrasted and compared with the control group and analyzed using two-way analysis of variance (P < 0.05). RESULTS: The results showed that chemical disinfection and autoclave sterilization had no significant effect on the tensile strength and surface roughness, whereas microwave sterilization showed a statistically-significant reduction in tensile strength, and an increase in surface roughness. None of the disinfection and sterilization techniques had a significant effect on wettability. However, autoclave and microwave sterilization resulted in an increase in hydrophilicity of all the materials tested. CONCLUSION: Chemical disinfection and autoclave sterilization had no statistically-significant effect on the tested properties of elastomers, thus autoclave sterilization can be considered as an alternative and an effective mode of disinfection and sterilization to eliminate all forms of disease causing microorganisms from dental impressions.