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The length, width, axial gradient for the crowns,the heigh of gingival line,the width of anterior dentition and the ratio of crista marginalis of their teeth were measured and analysed in their photographs and dental casts after orthodontic treatment.
测量关于正畸治疗后上颌第一前磨牙和对侧尖牙的龈缘线高度和牙齿形态的6项指标：龈缘线高度、临床冠长度、宽度、单侧前牙列宽度、轴倾度和近远中边缘嵴比，进行两均数配对t检验，观察分析两组的差异。
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Because this produces peculiar tooth jaw face to misshape, constant expression is mid development undesirable reach cave, length of direction of around of bone of the upper jaw and perpendicular direction height shorten, tooth bend is narrow, the tooth lists jam, occlusive relation is disorder, anterior teeth or complete tooth bend are enclothed instead, before mandible true sex or false sex dash forward. 2 use DO method at the back of art of Jiao Zhi cleft palate in the portion caves at the back of art of abnormal cleft palate in the portion caves abnormal treatment method is very much, if Kettle reports block is mental,raise fight a way, the face guard method that Tind Lund uses, wang Ketao [1] uses Peng body to get together 4 fluorine ethylene fills up repair misshapes this kind etc.
因此产生特有的牙颌面畸形，常表现为面中部发育不良及凹陷，上颌骨前后方向长度及垂直方向高度变短，牙弓狭窄，牙列拥挤，咬合关系紊乱，前牙或全牙弓反覆盖，下颌真性或假性前突。2利用DO术矫治腭裂术后面中份凹陷畸形腭裂术后面中份凹陷畸形治疗方法很多，如Kettle报道枕颏支抗法，Tind lund采用的面罩法，王克涛[1]采用膨体聚四氟乙烯充填修复此类畸形等。
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Connaughton (1994) and Sprague (2000) mentioned that the differences of length, weight, and tension of the sonic muscle and the amount of protein and glycogen affect the types of sounds emitted. To reveal the producer of high-frequency sound, this research analyzed and compared the length, width, thickness and somatic of sonic muscle and the amount of protein and glycogen in seven sciaenid species occuring on the west coast of Taiwan (Johnius tingi, Johnius sina, Johnius amblycephalus, Johnius amblycephalus, Pennahia argentata, Chrysochir aureus, and Otolithes ruber), then to find if the differences of physic parameter and energy supplication are the major factors making O. ruber produce high frequency of sound.
在Connaughton (1994)和Sprague (2000)研究报中指出造成石首鱼产生不同型态的声音主要取决於发声肌肌纤维的长度、重量、张力、蛋白质与肝醣含量的差异性，为了证实高频声音确实为红牙鱼或所产生，本研究将分析比较在台湾西岸海域其他不同石首鱼(红牙鱼或、黄金鳍鱼或、白姑鱼、中华叫姑鱼、皮氏叫姑鱼、丁氏叫姑鱼与顿头叫姑鱼)发声肌之长度、重量、蛋白质与肝醣含量差异，探讨发声肌在物理参数与能量的供应的差异是否为造成红牙鱼或产生高频鸣音之主要因素。
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Results Compared with T1, statistically significant increases were recorded in all dentoalveolar and dental arch widths, except for the intermolar width measured fossa, and also arch perimeter at T2 (P＜0.05). No significant changes were found in the arch depth.
结果 与T1阶段相比，T2阶段除了磨牙中央窝点间牙弓宽度测量项目外，所有牙槽弓、牙弓宽度测量值以及牙弓周长测量值均显著增大（P＜0.05），但牙弓长度的变化无统计学意义。
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Change of arch width after extraction and nonextraction treatment;2. Effects on arch width after extraction and nonextraction treatment;3. Intercanine and intermolar arch widths and anterior arch depths of the maxillary and mandibular arches were measured.
结论与不拔牙矫治相比，拔牙矫治不会减小尖牙间牙弓宽度和前牙段牙弓长度而影响面部美观；但拔牙和不拔牙矫治都能引起磨牙间牙弓宽度的改变，可能影响疗效的长期稳定性。
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ResultsCompared with T1, statistically significant increases were recorded in all dentoalveolar and dental arch widths, except for the intermolar width measured fossa, and also arch perimeter at T2 (P＜0.05). No significant changes were found in the arch depth.
结果与T1阶段相比，T2阶段除了磨牙中央窝点间牙弓宽度测量项目外，所有牙槽弓、牙弓宽度测量值以及牙弓周长测量值均显著增大（P＜0.05），但牙弓长度的变化无统计学意义。
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During en mass retraction of upper anterior teeth with straight wire technique, the length of anterior hook mainly influenced anteroposterior moving pattern of anterior teeth. As anterior hook increased from 0 to 6mm, labiolingual displacements of lateral incisor varied form lingual tipping to lingual translation and lingual controlling root movement, while 3-D displacements of other teeth only increased in account.
3直丝弓矫治技术整体内收上前牙时，牵引钩的长度主要影响前牙的矢状向位移方式：牵引钩长度增加至6mm的过程中，除侧切牙在唇舌向上由舌向倾斜运动变为舌向整体平移和舌向控根运动外，前牙的三维位移只有数量的增大，趋势基本保持不变。
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Methods: Fifty-fix adolescents were chosen and divided into first premolar extraction and nonextraction groups, with 30 and 26 patients respectively. The pretreatment and posttreatment panoramic radiographs were taken. The indexes of third molar eruption space, distance from third molar to occlusal plane and the length of mandible were measured and analyzed.
选择56例上下颌第三磨牙均存在的患者进行方丝弓正畸治疗，按照第一前磨牙拔除与否分为拔牙组（30例）和非拔牙组（26例），利用术前术后曲面断层片对患者上下颌第三磨牙萌出间隙、第三磨牙与胎平面的距离以及下颌长度进行测量分析。
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The posterior length of the dental arch changed significantly (P.001). The maxillary and mandibular arch shapes didn't change before and after treatment.
结果：上、下牙弓宽度在矫治前、后有显著差异(P.05)；上、下牙弓长度治疗前、后尖牙长度变化不明显，而第一磨牙长度具有显著性差异(P.001)；治疗前、后，上、下牙弓形状无明显变化。
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The dental width was normal in mixed dentition, whereas the posterior dental width was increased in adults. The dental length is decreased.
混合牙列期牙弓宽度不存在异常，而成人期后段牙弓宽度增大；牙弓长度则缩短。
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mandible length：下颌长度
Malocclusion 错牙合畸形 | mandible length 下颌长度 | mandibular clockwise rotation 下颌骨向下、向后呈顺时针方向旋转
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stud：螺桩
2.4.3 每支螺栓(Bolt)应配一只螺帽,每支螺桩(Stud)应配二只螺帽. 螺栓不必全牙制造,螺栓/螺桩的长度於螺帽垫圈安装锁紧后,至少须露出三牙,埋於地下的螺栓则须使用[展性铸铁(Ductile Iron)][ ]材质.