Murakami Mamoru, Kawahata Naotsugu, Nagaoka Eiichi
Department of Oral and Maxillofacial Prosthodontics, Kagoshima University Graduate School of Medical and Dental Sciences 8-35-1, Sakuragaoka, Japan.
Dent Mater J. 2007 May;26(3):429-36. doi: 10.4012/dmj.26.429.
The aim of this study was to develop a three-dimensional method to analyze edentulous ridge shapes. A laser projection method was used to record the shape of edentulous plaster models. Contour of residual ridge on the reconstructed image was then subdivided into small triangles, and a 'normal line' representing the center of gravity of each triangle was determined buccolingually and anteroposteriorly. Angle between the normal line on the residual ridge and the tentative occlusal plane was calculated for each triangle. These angles were then used to analyze the ridge shape. This method was used to analyze the ridges of 20 edentulous patients with excessive bone resorption. The results suggested that this method was useful for analyzing edentulous ridges regardless of ridge shape and degree of resorption.
本研究的目的是开发一种三维方法来分析无牙颌牙槽嵴形态。采用激光投影法记录无牙颌石膏模型的形态。然后将重建图像上剩余牙槽嵴的轮廓细分为小三角形，并确定代表每个三角形重心的“法线”在颊舌向和前后向的位置。计算每个三角形剩余牙槽嵴上的法线与暂定咬合平面之间的夹角。然后利用这些角度分析牙槽嵴形态。该方法用于分析20例骨吸收过度的无牙颌患者的牙槽嵴。结果表明，该方法无论牙槽嵴形态和吸收程度如何，都有助于分析无牙颌牙槽嵴。
