Kawahata N, Kamashita Y, Nishi Y, Hamano T, Nagaoka E
The Second Department of Prosthetic Dentistry, Kagoshima University Dental School, Kagoshima City, Japan.
J Oral Rehabil. 1998 Feb;25(2):110-6. doi: 10.1046/j.1365-2842.1998.00213.x.
The purpose of this study was to develop a diagnostic system with which to determine the adequate area for artificial tooth arrangement on the posterior residual ridge. Edentulous plaster models and occlusion rims were measured by a non-contact type shape measurement system. Three trigonal pyramids and their impressions on the occlusion rims were used as landmarks for the analysis and superimposition of the analysis results for the upper and lower ridges. The data points were obtained at intervals of 0.5 mm in the lateral direction and of 0.25 mm in the anteroposterior direction, and were interpolated by cubic spline curves in the lateral direction. When the ridge contour of the reconstructed image came in contact with the tangent line inclined at 30 degrees to the tentative plane of occlusion at the buccal and lingual sides in the frontal section, the area between their points of contact on both sides was comparatively flat and was regarded as adequate for the artificial posterior tooth arrangement in this study. This diagnostic system seems to be useful in determining the adequate area for the artificial tooth arrangement on the posterior residual ridges of edentulous plaster models and in displaying their horizontal relationship.
本研究的目的是开发一种诊断系统，用于确定无牙后牙嵴上人工牙排列的合适区域。使用非接触式形状测量系统对无牙石膏模型和咬合堤进行测量。三个三角锥及其在咬合堤上的印记用作分析的标志点，并用于上下颌骨分析结果的叠加。数据点在横向以0.5mm的间隔、在前后方向以0.25mm的间隔获取，并在横向通过三次样条曲线进行插值。当重建图像的嵴轮廓在额状切面的颊侧和舌侧与相对于暂定咬合平面倾斜30度的切线接触时，两侧接触点之间的区域相对平坦，在本研究中被视为适合人工后牙排列。该诊断系统似乎有助于确定无牙石膏模型后牙嵴上人工牙排列的合适区域，并显示它们的水平关系。
