the results showed that marginal ramus of cingulate sulcus and posterior ascending ramus of lateral sulcus are the landmarks for recognition of central sulcus.
结果显示:扣带沟缘支和外侧沟后升支是识别中央沟的标志,若出现壁间回则更易识别中央沟;
the results showed as follows:the more resorption of the residual ridge, 1. the lengths of mandibular body and ascending ramus increased;