Guerra Elen, Pereira Cristiane, Faria Renata, Jorge Antonio Olavo, Bottino Marco Antonio, de Melo Renata Marques
Int J Periodontics Restorative Dent. 2016 Nov/Dec;36(6):825-831. doi: 10.11607/prd.2779.
This study evaluated the in vitro bacterial microleakage at the implant-abutment interface of three prosthetic connections: external (EH) and internal hexagon (IH) and taper connection (TC: solid [ST], taper with internal hexagon [IT], and short taper [OT]). Escherichia coli (E coli) and Streptococcus sanguinis (S sanguinus) were inoculated in the apical portion of the abutment screw, which was immersed in sterile brain-heart infusion broth for 14 days. There were no differences between the percentages of bacterial infiltration for IH (9.09%), ST (21.74%), IT (22.73%), and OT (11.11%). EH did not present viable bacteria. There were no significant differences in the counts of connections inoculated and not infiltrated by E coli or S sanguinis nor in those infiltrated by both bacteria (one-way analysis of variance, P < .05). Except for EH, all implant designs and abutments showed bacteria that were capable of surviving and causing infiltration.
本研究评估了三种修复连接方式（外部六角连接[EH]、内部六角连接[IH]和锥形连接[TC：实心[ST]、带内部六角的锥形[IT]和短锥形[OT]]）在种植体-基台界面处的体外细菌微渗漏情况。将大肠杆菌（E coli）和血链球菌（S sanguinis）接种于基台螺钉的顶端部分，该部分浸入无菌脑心浸液肉汤中14天。IH（9.09%）、ST（21.74%）、IT（22.73%）和OT（11.11%）的细菌浸润百分比之间无差异。EH未出现活菌。接种且未被大肠杆菌或血链球菌浸润的连接数量以及被两种细菌浸润的连接数量之间均无显著差异（单因素方差分析，P <.05）。除EH外，所有种植体设计和基台均显示有能够存活并导致浸润的细菌。
