突下颌的

Objective: To study the correlation between ankylosis of TMJ and condylar fracture.

目的：探讨外伤性颞下颌关节强直与髁突骨折的关系。

Results: When the slide segment was retained 1 mm width,the fifth cheek tooth and anterior edge midpoint of condyle process anterior slope and coracoid process showed negative displacement and the angle of mandible and the posterior edge midpoint of condyle process posterior slope showed positive displacement on x axes.

结果：在牵张过程中牵张侧下颌骨标志点位移趋势为在内外方向上第五臼齿、喙突、髁状突前斜面前缘中点的运动趋势是向外的，而下颌角、髁状突后斜面后缘中点的运动趋势是向内的；在前后方向上第五臼齿、喙突的运动趋势是向后的，而下颌角的运动趋势是向前的；在上下方向上第五臼齿的运动趋势是向上的。

The posterior border cannot extend further in this region because it will cause pressure on the pterygoid hamulus, and interfere with the action of the pterygomandibular raphe which is pulled forwards as the mouth is opened.

因为没有肌肉和韧带，后腭处封闭跨越翼上颌切迹中部最深的部分，在此区域，后缘不可延伸的过长，因为会压迫翼钩和干扰妨碍张口时翼突下颌缝向前运动。

Objective To analysis the complications caused by technique of intraoral Sagittal Split Ramus Osteotomy for correction of mandibular prognathism and how to prevent them from occurring.

目的：探讨应用下颌升支矢状劈开截骨术矫治下颌前突并发症的原因及预防措施。

Methods From January 1997 to January 2005, 95 patients suffering from mandibular prognathism or accompanied by other deformities have been operated on by technique of intraoral SSRO in our hospital were studied.

对1997年1月～2005年1月于我院采用下颌升支矢状劈开截骨术矫正的下颌前突及下颌前突合并其他部位畸形患者95例术后并发症进行回顾性分析。

Many studies about mandibular functional protrusion show that the mandibular postural position is changed and the activity of the lateral pterygoid muscle increases after the appliance is inserted and the proliferation of the condylar cartilage leads to the increases of the mandibular length.

对功能矫形前伸下颌的大量研究表明，前伸下颌的矫治器改变了下颌的姿势位，下颌前伸肌功能活动加强，明显促进了髁突和下颌骨增生，下颌骨综合长度增加。

RESULTS:①There was higher tensile stress at the ingual side of symphysis, inside of molar and outside of condyle under the impact of chin.②There was higher tensile stress at the lingual side of symphysis, inside of contralateral molar, outside of contralateral angle, outside of homolateral angle and inside of homolateral body under the impact of body.③There was higher tensile stress at the inside of angle, inside of homolateral condyle, lingual side of symphysis, outside of contralateral condyle and inside of homolateral molar under the impact of angle.

结果：①撞击颏部，其舌侧区，磨牙后区内侧面、髁状突颈外表面以及下颌角外表面具有较高的张应力；②撞击下颌体部，颏部舌侧区，对侧磨牙后区内侧面、对侧下颌角外表面、撞击侧下颌角外侧面、撞击侧体部内侧面具有较高的张应力；③撞击下颌角，其内侧面、撞击侧髁状突颈内侧面、颏部舌侧面、对侧髁状突颈外表面以及撞击侧磨牙后区内侧面具有较高的张应力。

In this study, we use Computer Aided Diagnosis Axiogragh recorded condylar movement of normal occlusion and Angle class two division one subdivision malocclusion with mandibular retrusion every twenty-five during mandible open and close, protrusion and retrusion, and medio-free movement. Then we analysis the deference in order to find out the characteristic of condylar movement of Angle class two division one subdivision malocclusion with mandibular retrusion and the change regularity among befor and after functional appliance treatment.

本研究以正常牙合和下颌后缩型安氏Ⅱ类1分类错牙合各25名为研究对象，采用髁突运动轨迹轴图描记仪(Computer Aided Diagnosis Axiogragh)记录其下颌在开闭口、前伸后退和侧方运动时髁突的运动情况，对比分析下颌后缩型安氏Ⅱ类1分类错牙合的髁突运动轨迹特征及其功能矫治前后髁突运动轨迹的变化。

The conventional cephalometric analysis chosen SNA, SNB, ANB, NA-PA etc to reflect the protrusion or retrusion of maxillary and Mandible, but they can't reflect this extent quantitatively. The Delaire cephalometric analysis can analyze the protrusion or retrusion of maxillary and Mandible quantitatively through Me-F1,Me-Met,Np-F1 etc. This method combine with conventional methods can evaluate accurately, quantitatively and directly.

传统头影测量分析选用SNA、SNB、ANB、NA-PA等角度来反映上下颌的前突或后缩，并不能定量的反映上下颌前突或后缩的程度；而Delaire头影测量分析中Me-F1，Me-Met，Np-F1可定量分析上下颌前突或后缩程度，结合传统的角度测量将利于直观、定量的评价，也利于准确的诊断设计。

All findings indicated that adult Angle III anterior crossbite can be corrected with reverse TBA combined Edgewise,and the speed was very quickly.

下颌前突的成人患者应用改良固定反式TBA后，下颌明显后退，下颌的变化较上颌大。同时联合方丝弓技术较其它掩饰性治疗的疗程明显缩短，对成人的治疗快速高效。

Cynanchum Lingtai apricot production in the average weight 65 grams, the brightly-colored fruit, juicy rich, sweet-sour taste, sweet from the nucleolus, when the late Qing Dynasty famous Shaanxi, Gansu provinces, the Qing imperial court Tongzhi tribute for years.

灵台生产的牛心杏平均单果重65克，果实色泽鲜艳，汁多味浓，甜酸适口，离核仁甜，清末时就驰名陕、甘两省，清同治年间曾为朝廷贡品。

Chenopodium album,Solanum nigrum, and Amaranthus retroflexus were very susceptible to the herbicides. Polygonum persicaria and Abutilon theophrasti were relatively less susceptible to the herbicides, and Lycopersicon esculentum was not susceptible to it. The relationship between reduction rates of weed biomass and PPM values of weed leaves 2,4, and 6 days after treatment was established.

供试的6种杂草对该混剂的敏感性存在显著差异：红心藜Chenopodium album、龙葵Solanum nigrum和反枝苋Amaranthus retroflexus对该混剂最敏感，ED90值分别为47.65、71.67和29.17g/hm2；春蓼Polygonum persicaria和苘麻Abutilon theophrasti敏感，ED90值分别为96.91、114.20g/hm2；而番茄不敏感。