Ozdiler Arda, Bakir-Topcuoglu Nursen, Kulekci Guven, Isik-Ozkol Gulbahar
Int J Oral Maxillofac Implants. 2018 September/October;33(5):1071–1077. doi: 10.11607/jomi.6257. Epub 2018 Jun 12.
The aim of this study was to compare the bacterial leakage of conical internal connection implants with different taper angles (5.4, 12, 45, and 60 degrees) and examine the efficiency of a disinfectant agent and a silicone sealant agent in the prevention of bacterial leakage under loaded conditions.
Twenty-one implant-abutment connections were studied from each implant system (Ankylos Implants, Dentsply; Bego Semados S Implants, Bego; Trias Implants, Servo-Dental; DTI Implants, DTI), for a total of 84 implants. Each system's implants were divided into three groups as follows: unsealed (control), 2% chlorhexidine gel-sealed, or silicone-sealed (n = 7 for each group). The insertion torque was applied to each abutment screw according to the manufacturers' recommendation. The specimens were partially immersed in an 8-mm E faecalis suspension. A cyclic load of 50 N was applied for a total of 500,000 cycles at 1 Hz to the specimens. Following disconnection of dental implants and abutments, microbial samples were taken from the inner threaded surface of the implants, plated, and counted under appropriate conditions.
There were no statistically significant differences in frequency of bacterial leakage and leaked bacterial counts among the four types of connections in all groups (P > .05). The statistically significant differences were found between sealant agents and control groups in four different connection types in terms of the amount of leaked bacteria (P < .05). There was no significant difference between the amount of leaked bacteria for four connection types when comparing the chlorhexidine and silicone sealant agents (P > .05).
Differences in taper angles in the internal conical connections had no significant effect on leaked bacterial counts or the frequency of bacterial contamination under dynamic loading. The application of 2% chlorhexidine gel or a silicone sealant can reduce the leaked bacterial counts and reduce the frequency of bacterial leakage.
本研究的目的是比较不同锥角（5.4度、12度、45度和60度）的锥形内连接种植体的细菌渗漏情况，并检验一种消毒剂和一种硅酮密封剂在负载条件下预防细菌渗漏的效果。
对每个种植体系统（ANKYLOS种植体，登士柏公司；贝格Semados S种植体，贝格公司；TRIAS种植体，Servo-Dental公司；DTI种植体，DTI公司）的21个种植体-基台连接进行研究，共84个种植体。每个系统的种植体分为以下三组：未密封（对照组）、2%氯己定凝胶密封或硅酮密封（每组n = 7）。根据制造商的建议，对每个基台螺钉施加插入扭矩。将标本部分浸入8毫米的粪肠球菌悬液中。以1赫兹的频率对标本施加50 N的循环载荷，共500,000次循环。在将牙种植体与基台断开连接后，从种植体的内螺纹表面采集微生物样本，接种并在适当条件下计数。
所有组中四种连接类型的细菌渗漏频率和渗漏细菌数量在统计学上没有显著差异（P > 0.05）。在四种不同连接类型中，密封剂组和对照组在渗漏细菌数量方面存在统计学显著差异（P < 0.05）。比较氯己定和硅酮密封剂时，四种连接类型的渗漏细菌数量没有显著差异（P > 0.05）。
内锥形连接中锥角的差异对动态加载下的渗漏细菌数量或细菌污染频率没有显著影响。应用2%氯己定凝胶或硅酮密封剂可以减少渗漏细菌数量并降低细菌渗漏频率。
