他偶然发现了一个450万年前的有袋动物的颌骨。
He came across the jawbone of a 4.5 million-year-old marsupial.
用主动矫治器行双侧唇腭裂术前矫治前突的前颌骨是合理和有效的手段。
Using active preoperative orthopedics to reposit the protruding premaxilla of bilateral cleft palate is a reasonable and effective approach.
目的：探讨下颌升支矢状骨劈开术（SSRO）前徙下颌后，在不同颌周肌肉作用下，下颌升支手术区内的应力分布情况，从理论力学的角度为临床治疗提供依据。
Objective: To study the distribution of stress caused by different mastication muscles in mandibular ramus operative area after sagittal split ramus osteotomy (SSRO), so as to guide the clinical work.
结果常规前位及张口上仰位三相骨显像对颞颌关节紊乱综合征的阳性检出率分别为70 .83%、87.50 %。
Results The diagnostic positive rates in usually anterior position and "mouth open and face upward" were 70.83% and 87.50% respectively.
它的特征包括其各细节的前颌骨，鼻骨，齿骨，头骨和在尾椎骨末端的形状。
It can be diagnosed by various details of the premaxilla, nasal, and dentary in the skull and the shape of the distal caudal vertebrae.
我们拥有的是上颌的尖端，这是一种叫做前颌骨的骨头；还有一个保藏在牙槽里的、破碎的牙齿。
All we have is the tip of the upper jaws -bones called the premaxillae, and a broken tooth preserved in one socket, "said Dr Martill."
我们拥有的是上颌的尖端，这是一种叫做前颌骨的骨头；还有一个保藏在牙槽里的、破碎的牙齿。
All we have is the tip of the upper jaws -bones called the premaxillae, and a broken tooth preserved in one socket, "said Dr Martill."
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