Younes S, el Angbawi M F, al Dosari A M
College of Dentistry, King Saud University, Riyadh, Saudi Arabia.
J Oral Rehabil. 1995 May;22(5):391-5. doi: 10.1111/j.1365-2842.1995.tb00790.x.
The present study constitutes an attempt to compare normal traits for palatal height and width at different stages of dentition development of two ethnic groups of the Middle East. The observations were obtained from 346 randomly selected normal subjects, 188 Saudis and 158 Egyptians. The stone models were divided into three categories in both groups--primary, mixed and permanent dentitions. Palatal index values were calculated at two levels. Vernier calipers were used to measure the palatal width. Palatal depth was measured by profile Gauge by Vitrex. The results of this study demonstrate no significant difference between ethnic groups at levels 1 and 2 in relation to the palatal height, width and index. For both groups, palatal index increased significantly from the primary to mixed and permanent dentition at level 1. At level 2, palatal index and height showed decreases in measurement in the mixed dentition compared with the primary and the permanent dentitions. Subjective assessment of the palatal height correlated with palatal index. The casts were then labelled so that the shallow group had the smallest palatal index followed by the normal and the deep group had the largest palatal index. The results contribute to the information available on the development of palatal shape within two Middle Eastern populations. Knowledge of the normal range in shape can act as a baseline for studies of certain oral developmental abnormalities.
本研究旨在比较中东两个族群在牙列发育不同阶段腭部高度和宽度的正常特征。观察对象为346名随机选取的正常受试者，其中188名沙特人，158名埃及人。两组的石膏模型均分为三类——乳牙列、混合牙列和恒牙列。在两个水平上计算腭指数值。使用游标卡尺测量腭宽度。腭深度用Vitrex轮廓仪测量。本研究结果表明，在第1和第2水平上，两个族群在腭高度、宽度和指数方面无显著差异。对于两组，在第1水平上，腭指数从乳牙列到混合牙列和恒牙列均显著增加。在第2水平上，与乳牙列和恒牙列相比，混合牙列的腭指数和高度测量值降低。腭高度的主观评估与腭指数相关。然后对模型进行标记，使浅组的腭指数最小，其次是正常组，深组的腭指数最大。这些结果为中东两个族群腭部形态发育的现有信息做出了贡献。腭部形态正常范围的知识可作为某些口腔发育异常研究的基线。
