The posterior arch of stapes was situated in the prozone of scala.
镫骨后弓相当于鼓阶的前界。
Objective To study the growth changes of available space of lower posterior arch.
目的研究下牙弓后段可用间隙生长变化特点。
Conclusion the equations predicting the available space of lower posterior arch were established.
结论建立下牙弓后段可用间隙预测方程。
The authors present a novel technique of atlantoaxial fixation using multiaxial C-1 posterior arch screws.
作者描述了使用多轴c - 1后弓螺钉固定寰枢椎这一较新颖的技术。
Significant difference of the posterior arch-widths was observed between the group with and without ICP-MCP discrepancy.
②肌位牙位不调与否的两组间在上下牙弓后段宽度上存在差异；
Results: (1) The posterior arch of atlas was thin with a fan-shape section, whose inner plane descended from back to inside.
结果：（1）寰椎后弓较纤弱，横截面呈扇形，内侧面从后上方向内下方倾斜；
Posterior screw fixation on atlas includes posterior screw fixation within lateral mass of atlas and in atlas via posterior arch and lateral mass.
后路寰椎螺钉固定包括寰椎侧块螺钉和寰椎后弓侧块螺钉固定。
Result the parameters of posterior arch, lateral mass, vertebral artery groove, axis length of screw pass via posterior arch and lateral mass, projection and direction of screw were measured.
结果测量出寰椎后弓、侧块、椎动脉沟、后弓侧块螺钉通道的轴线长度，及后弓进钉点和进钉方向等参数。
Intraoperative posterior approach general spine pedicle screw-rod orthopaedics fixation system used and iliac bone block were implanted in space of posterior atlantal arch and axial vertebral plate.
术中应用经后路通用脊柱椎弓根钉棒矫形固定系统固定，同时在寰椎后弓和枢椎椎板间大量髂骨植骨融合。
Conclusion: Relieving the tension of anastomosis, enlarging the outlet of thorax and the space posterior to aortic arch are key steps for preventing anastomotic fistula.
结论：降低吻合口张力，保证胸腔入口、主动脉弓后间隙宽畅是避免吻合口瘘发生的关键。
The therapeutic effect of nerve decompression and vertebral canal plasty combined with the screw-rod system fixation of posterior pedicle of vertebral arch and the fusion of bone graft is fine.
神经减压和椎管成型辅以后路椎弓根钉捧系统同定及植骨融合术治疗退行性下腰椎不稳疗效优良。
Occlusion plane was defined as conference plane, the buccal or lingual inclination of posterior teeth in upper and lower arch was measured.
同时以平面作为参考平面，测量上下颌后牙颊舌向倾斜程度。
Posterior margin of lumbar vertebral posterior regional node appeared as arch protruding into spine canal, resulting in stenosis of spine canal and intervertebral foramen.
位于椎体后缘者可导致椎管狭窄，如其后缘断裂则可能合并椎间盘突出。
Conclusion: We use L as arch length and H as chord length to bend syringe needle that is used to posterior superior alveolar nerve block anesthesia by intraoral injection. The success rate is 98%.
结论：以牙槽孔至颧下嵴起始部的弧长和弦长为标准弯制注射针头，采用口内注射法进行上牙槽后神经阻滞麻醉，成功率为98％。
Results (1)Dental arch transverse discrepancy was seen in 60.4% , bilateral posterior crossbite in 33.3% , and unilateral posterior crossbite in 16.7% of patients with UCLP, respectively .
结果（1）单侧完全性唇腭裂术后患者中出现上下颌牙弓宽度不调的比率为6 0 .4 % ，双侧后牙反为33.3% ，单侧后牙反为16 .7%。
Results (1)Dental arch transverse discrepancy was seen in 60.4% , bilateral posterior crossbite in 33.3% , and unilateral posterior crossbite in 16.7% of patients with UCLP, respectively .
结果（1）单侧完全性唇腭裂术后患者中出现上下颌牙弓宽度不调的比率为6 0 .4 % ，双侧后牙反为33.3% ，单侧后牙反为16 .7%。
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