Wang H Y
Zhonghua Kou Qiang Yi Xue Za Zhi. 1989 May;24(3):152-5, 191.
In this research the posterior alveolar ridge and the external oblique ridge area of 103 mandibular specimens of adult subjects-122 sides with teeth intact and 62 sides with edentulous ridge were measured in different items. The dissection of the external oblique ridge area in 7 cadavers was made and observed. The results showed: (1) the atrophy of residual alveolar ridge of the mandible is severe than that of the maxilla; (2) the resorption of the buccal alveolar plate is more than that of the lingual plate; (3) the resorbed buccal portion of the mandibular alveolar ridge is replaced by the external oblique ridge area, so that the latter becomes wider and flatter. This change of form is beneficial for the denture support and the extension of the buccal flange of the lower denture. The data of the resorption of the buccal alveolar plate provide the reference of the arrangement of the posterior teeth of the lower complete denture. Consequently, we may conclude that the external oblique ridge area is utilizable and beneficial for the support and stability of the lower complete denture.
本研究对103例成年受试者下颌骨标本的后牙槽嵴及外斜线区进行了测量，其中122侧牙齿完整，62侧为无牙嵴，测量项目包括不同方面。对7具尸体的外斜线区进行了解剖观察。结果显示：（1）下颌骨剩余牙槽嵴的萎缩比上颌骨严重；（2）颊侧牙槽骨板的吸收比舌侧骨板多；（3）下颌牙槽嵴吸收的颊侧部分被外斜线区替代，使得后者变得更宽更平。这种形态变化有利于义齿支持及下颌义齿颊侧翼缘的伸展。颊侧牙槽骨板吸收的数据为下颌全口义齿后牙排列提供了参考。因此，我们可以得出结论，外斜线区是可利用的，且有利于下颌全口义齿的支持和稳定。
