the upper jaw

The upper and lower jaws possess straight tooth rows and the jaw arches are almost rectangular in shape.

上、下颌具有直的齿列，而颌弓几乎呈直角形。

Primo, the acanthopterygians, whose upper jaw is fully formed and free-moving, and whose gills take the shape of a comb.

第一目是硬鳍鱼，上鳃是完：整的，能动的，鳃作梳子形。

The buccal-pharynx cavity was large and there were serration cingula on the upper jaw and mandible, vomer and palatine bone; The mucosa was composed of stratified squamous epithelium with many mucous secretory cells and a few goblet cells in buccal-pharynx cavity;

口咽腔较大，上下颌，犁骨及腭骨均有细齿带，粘膜由复层鳞状上皮组成，并含有大量黏液细胞和少量杯状细胞；

Jaws must be undershot . The incisors of the jaw should protrude over the upper incisors.

咬合必须是下颌突出式咬合, 就是说,下颌的门牙必须比上颌的门牙向前突出一些.

Unfortunately, the fourth premolar in the upper jaw is quite large and looks like the first molar in the lower jaw; it is known as a carnassial tooth.

不幸的是，上颚的第四颗前臼齿很大，看起来就象是下颚的第一颗臼齿，这颗前臼齿也被称作叫裂齿。

Upper body discomfort in one or both arms, the back, neck, jaw, or stomach.

上体不适.具体包括单臂或双臂 、 背部 、 颈部 、 颚部或腹部不适.

By setting two perspective cameras at the first molars of the upper jaw and using the OpenGL selection mode, the real-time collision detection with high efficiency between lower and upper jaws can be realized as the lower jaw rotates around the axis of the articulator.

该方法通过在上颌左右第一磨牙近中舌尖处建立透视视景体，利用OpenGL的选择模式，可以实时地检测下颌模型绕牙合架转动轴线旋转过程中与上颌模型碰撞对位情况，效率很高。

The position relation between and upper jaw and mandible during the hinge movement.

铰链运动状态下下颌对上颌骨的位置.

Scientists have named the new species Australopithecus deyiremeda. Researchers used a partial upper jaw and two lower jaws ( one recovered in two pieces), to describe the species.

科学家把这一新物种命名为Australopithecus deyiremeda（南猿近亲属），研究员利用一个上颌和两个下颌（下颌被发现时已是两半）来描述这一物种。

The tooth was drawn from the upper jaw.

牙从上腭取下来了.

CT reconstruction can show the relationship between jaw bone, hyoid bone and Upper airway.

上气道体积重建可以完整地显示上气道与上下颌骨及舌骨的关系.