Effect of Component Dismantling on Quality of Sterilization of Mechanical Torque Limiting Devices: A Pilot Study
Journal Title: Journal of Dental School Shahid Beheshti University of Medical Sciences - Year 2017, Vol 35, Issue 4
Abstract
Objectives Dental instruments may serve as a route of infection transmission. The necessity of dismantling of friction-style (FS) and spring-style (SS) mechanical torque limiting devices (MTLDs) prior to disinfection and sterilization is a matter of debate, aside from the fact that it is difficult and time-consuming. This study sought to assess the effect of dismantling of components on quality of sterilization of MTLDs. Methods This in vitro experimental study was carried out on 96 MTLDs including 48 FS-MTLDs of two manufacturers (n=24) namely Astra Tech (Hader SA, La Chaux-de-Fonds, Switzerland) and Dr. Idhe (Dr. Idhe Dental, Eching, Munich, Germany) and 48 SS-MTLDs of two manufacturers (n=24) namely Nobel Biocare (Nobel Biocare, Goteborg, Sweden) and Straumann (Institut Straumann, Basel, Switzerland). After coding, specimens were inoculated with Bacillus stearothermophilus (PTCC1713) and 24 devices of each of the four manufacturers were divided into two groups (n=12) for disinfection in assembled and disassembled forms. Each group was then divided into two subgroups (n=6) for sterilization in assembled and dismantled forms. After disinfection and sterilization, bacterial proliferation was assessed for all MTLDs. In case of observing turbidity, Gram-staining and differential tests were carried out. The results were expressed as presence or absence of contamination. Results Growth of Bacillus stearothermophilus did not occur in any plate (no turbidity). Only one plate showed growth of Staphylococcus saprophyticus. Conclusion Dismantling of components had no significant effect on quality of sterilization of MTLDs.
Authors and Affiliations
Aboulfazl Saboury, Seyyed Jalil Sadr, Gita Eslami, Mahsa Rashidpour, Mohammad Ebrahim Ahmad Nejad, Minoo Mahshid, Nazila Najari Dizaji, Ali Fayyaz
Keywords
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