Vallejo-Labrada Maricela, Ojeda-Garces Juan Carlos
Faculty of Dentistry, Universidad Cooperativa de Colombia, San Juan de Pasto, Nariño, Colombia.
Int J Dent. 2017;2017:1090534. doi: 10.1155/2017/1090534. Epub 2017 Feb 20.
This study identifies the most common microorganisms present in type III gold cast posts related to pulpal disease and evaluates the sterilization/disinfection method before cementation in the root canal. Forty-five type III gold cast posts were aseptically collected in sterile sealed plastic bags and taken to the microbiology laboratory to carry out the study: fifteen cast posts had no treatment, fifteen were disinfected (immersion in 70% alcohol during 15 minutes), and fifteen were autoclaved at 121°C for 15 minutes by using saturated steam under 15 psi pressure. By using a two-proportion -test, the difference was statistically significant ( > 0.05) and demonstrates that, in spite of the aseptic pattern used in the cast post collection and laboratory procedures, some cast posts arrive contaminated at the consulting office. The disinfection process worked out in a high percentage and demonstrated that the sterilization by autoclaving eliminated completely the pathogenic microbiota without affecting the cast post shape and integrity that could compromise their final fitting.
本研究确定了与牙髓疾病相关的III型金铸造桩中存在的最常见微生物，并评估了根管内粘固前的灭菌/消毒方法。45个III型金铸造桩被无菌收集在无菌密封塑料袋中，送至微生物实验室进行研究：15个铸造桩未作处理，15个进行了消毒（在70%酒精中浸泡15分钟），15个在15磅压力下使用饱和蒸汽于121°C高压灭菌15分钟。通过双比例检验，差异具有统计学意义（>0.05），表明尽管在铸造桩收集和实验室操作中采用了无菌模式，但一些铸造桩在咨询室时已被污染。消毒过程成功率很高，并且表明高压灭菌能完全消除致病微生物群，同时不影响铸造桩的形状和完整性，而这可能会损害其最终的适配性。
