Costa Gardel Nepomuceno, Martinez Elizabeth Ferreira, Ruellas Aluísio Martins de Oliveira, Peruzzo Daiane Cristina, Joly Júlio Cesar, Napimoga Marcelo Henrique
São Leopoldo Mandic Institute and Research Center, Campinas, SP, Brazil.
Int J Dent. 2017;2017:3849085. doi: 10.1155/2017/3849085. Epub 2017 Feb 28.
Considering the variety of implant connection systems available in the market and the contrasting literature regarding tapered connection systems in terms of bacterial leakage, the aim of this in vitro study was to compare the effectiveness of the bacterial seal at the implant/abutment interface between an external hexagon and a tapered connection system. Twelve sets of indexed tapered connection components and twelve sets of external hexagon connection components were used for microbiological analysis. In addition, for each model, an implant with its respective prosthetic abutment was used as a negative control and another as a positive control of microbial contamination. Failure of the abutment/implant interface seal was observed via turbidity or presence of deposits in the culture. Descriptive analysis of the data and relative frequency (percentage) as well as Fisher's exact test were used at a significance level of 5%. Two of ten (20%) external hexagon specimens showed contamination against 0/10 (0%) tapered connection implants. In conclusion, both implant/abutment connections were able to prevent bacterial leakage in vitro.
考虑到市场上可用的种植体连接系统种类繁多，以及关于锥形连接系统细菌泄漏方面的文献存在差异，本体外研究的目的是比较外六角形和锥形连接系统在种植体/基台界面处的细菌密封效果。十二套索引式锥形连接组件和十二套外六角形连接组件用于微生物分析。此外，对于每个模型，一个带有相应修复基台的种植体用作微生物污染的阴性对照，另一个用作阳性对照。通过培养物中的浑浊或沉积物观察基台/种植体界面密封的失败情况。数据的描述性分析、相对频率（百分比）以及Fisher精确检验在5%的显著性水平下使用。十个外六角形样本中有两个（20%）显示有污染，而锥形连接种植体为0/10（0%）。总之，两种种植体/基台连接在体外均能防止细菌泄漏。
