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- For the model of upper first molar, the RFDR with bony defects at buccal side, palatal side, mesial side and distal side were 5.5%, 2.3%, 17.2% and 23.1%, respectively. 上颚第一大臼齿在模拟颊侧、颚侧、近心侧与远心侧单侧齿槽骨缺损时，共振频率减少的比率分别为5.;5%25、2
- upper first molar 上颌第一磨牙
- 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。
- In these case, another four first molars extraction is a good choice to reach a good mesial and distal relationship between upper and lower molar area and get a good profile. 此时如增拔上下第一大臼齿，则可使臼齿区域的近远心关系及病人侧貌得到良好的改善。
- 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。
- 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。
- 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。
- But Longgupo also yielded a mystery jaw fragment, including the fourth premolar and the first molar. 但龙骨坡还发现了一件神秘的下颌残片，包括第四前臼齿和第一臼齿。
- After treatment the changes of dental arch width in first and second premolar region were larger than that of cuspid and first molar regions. 上颌第一、二双尖牙间各自宽度较尖牙间、一磨牙间宽度增加显著。
- Methods: In one mouth, the teeth of one side were as test group, other side as control group, the first molar in non-carious pit and fissure of 500 children were sealed. 方法：将500例儿童的第一恒磨牙分为两组，一侧第1恒磨牙为一组，对侧同名牙为第2组。
- This 40-year-old male suffered from inconvenience when eating due to the absence of the lower right first molar and second premolar. 本文报告一位40岁的男性病例，主诉右下后方缺牙导致吃东西不便。
- The differences in the cuspid and the first molar distances of the casts were measured to determine the surgical change and the relapse. 分别测量每个模型两侧尖牙和第一磨牙近中腭面外形高点连线距离。
- ObjectiveTo investigate the effect of lingual inclination of the first molar of mandible by using intermaxillary traction and fixed flat bite-plate. 研究应用交互牵引结合固定平面导板矫治下颌第一磨牙舌倾的临床效果。
- Objective To study the reason and preventive means of the acute inflammation during root canal therapy of submandibular first molar. 目的探讨下颌第一磨牙根管治疗术并发急性炎症的原因和防治措施。
