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- unhealthy first molars 病变第一磨牙
- Maximum lingual inclination was observed in the lower first molars. 最大唇（颊）侧倾斜为正门齿，最大舌侧斜则为第一大臼齿。
- Objective To measure the thickness of the first molars. 目的了解正常青壮年第一磨牙的牙体厚度。
- Conclusion The thickness of the first molars varied with ages. 结论不同的年龄组段,其牙体厚度有所不同。
- The fistula was connected with mandibular body but the first molar. 颊瘘与外斜线相连,与下颌第一磨牙根尖不相通连。
- Radix entomolaris(RE) is a supernumerary distolingual root of mandibular molars, mainly in mandibu-lar first molars. 远舌根是位于下颌恒磨牙远中舌侧的一个部分或完全独立的额外牙根,常见于下颌第一磨牙。
- Labial (buccal) inclination was observed in all teeth except the lower first molars and the lower second molars. 上颚皆为唇（颊）侧倾斜，最大唇（颊）侧倾斜为正中门齿。
- Methods: First molars and incisors bonded with bands and brackets respectively and light-straight wire were used. 方法:第一恒磨牙粘带环,切牙粘托槽,细圆丝及颌间牵引。
- Method: Eight male adult dogs underwent extraction of the mand ible third、 fourth premolar and first molar. 方法:8只成年雄性杂种狗,拔除双侧下颌第三、前磨牙和第一磨牙。
- The first molar plays an important role during mastication so you need a denture to replace it. 第一个磨牙在咀嚼的过程中发挥着重要的作用，因此您需要用一颗假牙来替换它。
- Methods Left mandible(without the second premolar and the first molar)was used for specimen. 方法对缺失的下颌骨进行固定桥修复。
- ObjectiveTo discuss the design and fabrication of the photoelastic model of mandibular first molar after hemisection. 目的探讨下颌第一磨牙半切术后光弹模型的设计和制作。
- Methods To compare anatomical factors between 68 extracted maxillary first molars with VRFs and 68 normal teeth of the same age and title. 方法对68颗拔除后证实为根纵裂的下颌第一磨牙及同龄正常的同名牙齿进行解剖学对比。
- An awareness and identification of the RE can contribute to the successful outcome of root canal treatment in mandibular first molars. 近年来,随着大家对下颌第一磨牙解剖的认识日益重视,对远舌根的研究日趋深入。
- Objective To observe the stress distribution of maxillary first molar and its periodontium in lingual orthodontics. 目的采用有限元的方法研究舌侧矫治过程中上颌第一磨牙牙根、牙周膜、牙槽骨应力分布的特点。
- The spaces of lower first molar were all closed using mesiotranslation of lower second molar. 应用第二磨牙近中平移技术关闭第一磨牙拔牙间隙。
- Another noted finding is that the furcation of alveolar bone played a major role on the tooth mobility of first molar. 且牙根分叉处齿槽骨对第一大臼齿牙齿动摇度的影响扮演了一个重要的角色。
- Their slavish devotion to the leader is unhealthy. 他们对领导的盲目崇拜是不健康的。
- Objective To study the anatomical factors of vertical root fractures(VRFs)on vital pulp of maxillary first molar. 目的分析活髓下颌第一磨牙根纵裂的解剖学病因。
- Methods Crowns made of five types of detental casting alloys were put on a crossbreed dog's first molar respectively. 方法选择目前临床口腔固定修复最常用的贵金属和非贵金属作为实验材料,通过动物实验的方法对它们在MRI图像上产生伪影的大小作分析。
