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首页> 外文期刊>The Journal of Prosthetic Dentistry >Accuracy of a predetermined transverse horizontal mandibular axis point.
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Accuracy of a predetermined transverse horizontal mandibular axis point.

机译：预定横向下颌水平轴点的精度。

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Statement of Problem. The transverse horizontal mandibular axis point may be located most precisely by a kinematic process. However, an anatomical method of locating the axis is also an acceptable technique, and an easily determined point that is consistently close to the kinematic axis would simplify transfer of the arc of rotation from the patient to the articulator. Purpose. This in vivo study compared the location of an anatomically predetermined hinge axis point with the determined kinematic axis. Material and Methods. Forty subjects (27 males, 13 females; 23 to 47 years of age) with functionally acceptable occlusion and no detectable clinical signs of temporomandibular disorders participated in the study. The earpiece alignment flags on a mechanical SAM Axiograph III combination flag/face-bow were used to locate the right and left predetermined hinge axis points, 10 mm anterior to the earpiece. The right and left kinematic center of rotation was located as described by Lauritzen and confirmed with the PC Axiotron electronic Axiograph to within 0.25 mm. All points were transferred to 1 mm(2) grid paper on the subject's skin. The distance between each predetermined and kinematic point was measured +/-0.25 mm. Wilcoxon and Mann-Whitney tests were used to examine differences between the left and right axis points and potential significant differences between genders at a significance level of P<.05. The number of occurrences and the distance of the predetermined axis points from the kinematic axis also were described. Results. The mean distance between points was 1.1 mm on the right (range 0.0 to 3.0 mm), 1.2 mm on the left (range 0.0 to 3.0 mm), and 1.1 mm for all 80 points (+/-0.63). More than 96% of the predetermined points were within 2 mm of the kinematic axis, and 67% were within 1 mm. There was no significant difference between the right and left points and no significant differences based on gender. Conclusion. Within the limitations of this study, the results suggest that the predetermined axis point is well within the clinical norm for estimated location of the transverse horizontal mandibular axis.
机译：问题陈述。可以通过运动过程最精确地定位横向下颌骨轴点。然而，定位轴的解剖学方法也是一种可接受的技术，并且容易确定的，始终靠近运动轴的点将简化旋转弧从患者到咬合架的传递。目的。这项体内研究将解剖学上预定的铰链轴点的位置与确定的运动轴进行了比较。材料与方法。功能上可接受的闭塞且没有可检测到的颞下颌疾病临床体征的四十名受试者（男27例，女13例; 23至47岁）参加了该研究。机械SAM Axiograph III组合标志/面弓上的听筒对准标志用于在听筒前方10 mm定位左右预定铰链轴点。如Lauritzen所述，确定左右旋转运动中心，并用PC Axiotron电子轴测仪确认其在0.25 mm以内。将所有点转移到对象皮肤上的1 mm（2）网格纸上。每个预定点与运动点之间的距离测量为+/- 0.25 mm。使用Wilcoxon和Mann-Whitney检验来检验左右轴点之间的差异以及性别之间的潜在显着差异（显着性水平为P <.05）。还描述了出现次数和预定轴点距运动轴的距离。结果。点之间的平均距离在右侧为1.1毫米（0.0到3.0毫米范围），在左侧为1.2毫米（0.0到3.0毫米范围），对于所有80个点均为1.1毫米（+/- 0.63）。超过96％的预定点在运动轴的2 mm以内，而67％的运动点在1 mm以内。左右两点之间没有显着差异，并且根据性别也没有显着差异。结论。在本研究的范围内，结果表明，预定的轴点完全在临床水平范围内，可用于估计水平下颌骨轴的位置。

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