Department of Prosthodontics, Kangwon National University Hospital, Chuncheon 24289, Republic of Korea.
Department of Prosthodontics, Kyung Hee University Dental Hospital, Seoul 02447, Republic of Korea.
Biomed Res Int. 2019 Feb 19;2019:7912371. doi: 10.1155/2019/7912371. eCollection 2019.
Few studies have been reported on the scientific measurements of the thickness and dimensions of the posterior palatal seal (PPS) area. The purpose of this study is to measure and analyze the thickness of palatal mucosa by using a three-dimensional (3D) model reconstructed with computed tomography (CT) images and to present objective values by identifying the PPS area. The CT images were reconstructed as a 3D model by separating the maxillary palate mucosa and teeth. Each reconstructed model was analyzed and the thickness was measured at 93 crossing points of each divided plane. The dimension of the PPS area was measured and the right and left dimensions of the PPS area were compared. The thickness of the palatal mucosa was thicker toward the posterior area. The thickness increased in the lateral direction and decreased again. In the PPS area, the mean dimension between the rearmost of anterior border and the most posterior line was 2.19 mm and the mean dimension between the forefront of anterior border and the most posterior line was 5.19 mm in the right side and 5.16 mm in the left side. The mean dimension from the center of the palate to the right most forward point was 6.85 mm, and the left was 7.36 mm. The new measurement method of palatal mucosal thickness is noninvasive, accurate, and easy to store and study, so it can be used effectively in planning and manufacturing the maxillary complete denture in the digital workflows.
鲜有研究报告对腭后区（PPS）的厚度和尺寸进行科学测量。本研究旨在通过使用计算机断层扫描（CT）图像重建的三维（3D）模型来测量和分析腭黏膜的厚度，并通过确定 PPS 区域来提供客观值。通过分离上颌腭黏膜和牙齿来重建 CT 图像的 3D 模型。对每个重建模型进行分析，并在每个划分平面的 93 个交点处测量厚度。测量 PPS 区域的尺寸，并比较 PPS 区域的左右尺寸。腭黏膜的厚度在后部区域较厚。厚度在侧向增加，然后再次减少。在 PPS 区域，前边界后缘与后缘最前缘之间的平均尺寸为 2.19mm，前边界前缘与后缘最前缘之间的平均尺寸为右侧 5.19mm，左侧 5.16mm。从中线到右侧最前缘的平均距离为 6.85mm，左侧为 7.36mm。腭黏膜厚度的新测量方法是非侵入性的、准确的，易于存储和研究，因此可在数字化工作流程中有效地用于上颌全口义齿的规划和制造。
