Consideration of positional relationship between occlusal plane and Camperʼs plane in conjunction with facial profile shape

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  • 顔面頭蓋の側貌形態による 咬合平面とカンペル平面の位置関係に関する考察
  • ―成人有歯顎者の3DCT セファロ分析から得られた統計的検討―

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<p>It has been reported that the occlusal plane generally parallels the Camperʼs plane, but de viations are not rare. The purpose of this study is to conduct a statistical analysis of the relation ship between occlusal plane and Camperʼs plane by cephalometric analysis using 3DCT (three dimensional computed tomography), which has an advantage over two dimensional X-ray images enabling more accurate measurements of soft and hard tissues. The cephalometric analyses were conducted based on mid-sagittal 3DCT images of patients with dentition (N=50), using the sella nasion (SN) plane as a reference standard. The anteroposterior morphology is examined by the angle of the nasion-mentum (N-Me) line against the SN plane and the vertical morphology by the angle of the mandibular plane against the SN plane. A correlation of these angles to the angle of the occlusal plane against Camperʼs plane was investigated by multiple linear regression analysis, and meaningful correlations were found (p<0.01). This indicates that facial profile shape is cor related to positional relationship between occlusal plane and Camperʼs plane. In occlusal recon struction using Camperʼs plane as a reference standard, the patientʼs original occlusion may be better reconstructed, if the angle of the N-Me line against the SN plane and the angle of the man dibular plane against the SN plane are taken into consideration and disagreement between the occlusal plane and Camperʼs plane is added to reference standards. </p>

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