Université Montpellier, France.
Biomed Eng Online. 2011 Apr 14;10:28. doi: 10.1186/1475-925X-10-28.
Most dental implant systems are presently made of two pieces: the implant itself and the abutment. The connection tightness between those two pieces is a key point to prevent bacterial proliferation, tissue inflammation and bone loss. The leak has been previously estimated by microbial, color tracer and endotoxin percolation.
A new nitrogen flow technique was developed for implant-abutment connection leakage measurement, adapted from a recent, sensitive, reproducible and quantitative method used to assess endodontic sealing.
The results show very significant differences between various sealing and screwing conditions. The remaining flow was lower after key screwing compared to hand screwing (p = 0.03) and remained different from the negative test (p = 0.0004). The method reproducibility was very good, with a coefficient of variation of 1.29%.
Therefore, the presented new gas flow method appears to be a simple and robust method to compare different implant systems. It allows successive measures without disconnecting the abutment from the implant and should in particular be used to assess the behavior of the connection before and after mechanical stress.
目前大多数牙种植体系统由两部分组成：种植体本身和基台。这两部分之间的连接紧密程度是防止细菌增殖、组织炎症和骨丢失的关键。之前已经通过微生物、颜色示踪剂和内毒素渗滤法来估计泄漏。
本研究从最近开发的一种灵敏、可重复和定量的方法中，开发出一种用于测量种植体-基台连接泄漏的新型氮气流技术，用于评估根管封闭。
结果显示，各种密封和旋紧条件之间存在显著差异。与手动旋紧相比，关键旋紧后的剩余流量较低（p = 0.03），且与阴性测试不同（p = 0.0004）。该方法的重现性非常好，变异系数为 1.29%。
因此，本研究提出的新型气体流量法似乎是一种比较不同种植体系统的简单而可靠的方法。它允许在不将基台从种植体上断开的情况下进行连续测量，特别应在机械应力前后用于评估连接的行为。
