Department of Periodontology, Catholic University Leuven, Kapucijnenvoer 33, 3000 Leuven, Belgium.
Clin Oral Implants Res. 2010 Apr 1;21(4):455-8. doi: 10.1111/j.1600-0501.2009.01836.x. Epub 2010 Jan 13.
Recently, guided surgery has been introduced and several papers verified its accuracy.
While those studies reported on the accuracy of the entire procedure, this experiment wanted to make clinicians aware of the amount of the deviation that can already occur during the drilling procedure alone, due to the tolerance of the drill in the drill key.
Drilling was executed in plexi-glass with a maximal inclination of the drills within the drill keys.
A mean deviation in angulation of 4.7 degrees occurred with a mean horizontal deviation at the implant shoulder of 0.8 mm and 1.8 mm at the apex of 13 mm implant. The deviation was further dependent of the implant length, the distance of the sleeve above the bone and the respective guiding system.
Increasing the height of the drill key will minimize the inaccuracy.
The results from this experiment showed the importance of keeping the drill parallel to the guide in a centric position.
最近，引导式手术已经被引入，并且有几篇论文验证了其准确性。
虽然这些研究报告了整个手术过程的准确性，但本实验希望让临床医生意识到，仅仅由于钻头在钻头钥匙中的公差，在钻孔过程中就已经会出现大量的偏差。
在聚碳酸酯玻璃上进行钻孔，钻头在钻头钥匙内的倾斜度最大。
在角度上平均出现 4.7 度的偏差，在植入物肩部的平均水平偏差为 0.8 毫米，在 13 毫米植入物的尖端为 1.8 毫米。偏差进一步取决于植入物的长度、套筒在骨头上方的距离以及相应的导向系统。
增加钻头钥匙的高度将最小化不准确性。
本实验的结果表明，保持钻头在中心位置与导向器平行的重要性。
