Bowley J F, Morgano S M
Faculty of Dentistry, Kuwait University Health Sciences Center, Jabriya, Kuwait.
J Prosthet Dent. 2001 Jul;86(1):67-73. doi: 10.1067/mpr.2001.115031.
Any deviation from the patient's rotational axis of the mandible during closure and the arc of closure on an articulator has been reported to produce occlusal discrepancies. These discrepancies can affect diagnostic planning procedures and the occlusal relationships of restorations.
This study investigated the magnitude and types of occlusal errors produced by deviations between the patient's transverse horizontal axis and the axle on the articulator.
A simplified monoplane model was diagrammatically analyzed for deviations from the model's true transverse horizontal axis. Axis deviations of 5 mm were used in 8 different directions from the true transverse horizontal axis of the model. Changes in the orientation of the mandibular plane to the maxillary plane were illustrated diagrammatically. These changes were quantified by geometric and trigonometric assessments.
All axis deviations produced mandibular plane orientation errors with angular plane malalignment to the maxillary plane on complete closure. These axis deviations also produced anterior-posterior shifting of the mandibular plane relative to the maxillary plane.
Several different types of planar shifting and angular discrepancies were demonstrated from deviations away from the true transverse horizontal axis.
据报道，在咬合过程中患者下颌骨旋转轴与牙合架上的咬合弧出现任何偏差都会产生咬合差异。这些差异会影响诊断计划程序以及修复体的咬合关系。
本研究调查了患者横向水平轴与牙合架轴之间的偏差所产生的咬合误差的大小和类型。
对一个简化的单平面模型进行图解分析，以确定其与模型真实横向水平轴的偏差。从模型的真实横向水平轴开始，在8个不同方向上采用5毫米的轴偏差。以图解方式展示下颌平面与上颌平面方向的变化。通过几何和三角测量评估对这些变化进行量化。
所有轴偏差都会导致下颌平面方向误差，在完全咬合时下颌平面与上颌平面出现角度错位。这些轴偏差还会导致下颌平面相对于上颌平面的前后移位。
偏离真实横向水平轴会出现几种不同类型的平面移位和角度差异。
