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Objective:To introduce a method of mesio-translation of lower second molar. 目的:介绍一种下颌第二磨牙近中平移技术。
In this article a new technique using the NiTi wire to upright the impacted lower second molar is introduced. 而在进行臼齿扶正时除考虑矫正装置之效率，方便性及病患舒适性之外，尚需考虑如何控制锚定，以避免造成锚定牙齿不必要的前移或挺出。
Despite of food impaction and proximal caries of first permanent molar, impacted lower second molar also affect the normal function of occlusion. 除了影响正常咬合功能外，常因食物阻塞而伴随大臼齿间软组织发炎或第一大臼齿远心侧龋齿。
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。
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。
The results of our investigation were as follows: the lower second molars had the highest percentage of caries followed by the upper central incisors in the deci-duous teeth. 其结果如下：在每个年龄层，龋齿在上颚比下颚多，而下颚孚牙第二大臼齿龋率最高，其次是上颚孚牙中切齿。
Clinical Observation of Caries of Distal Neck of Lower Second Molar Restorated with Singal Cavity 下颌第二磨牙远中邻面龋单面洞的修复
lower second molar 下颌第二磨牙
Objective To investigate the displacements and the stress distributions of a mandibular second molar. 目的了解下颌第二恒磨牙不同载荷下近中移动时的位移及应力分布情况。
To reinforce anchorage with second molar can prevent anchorage teeth movement mesially during canine distal movement. 将第二双尖牙、第一、第二磨牙连成整体，可减小尖牙远中移动时的支抗消耗。
This paper reports the root separation and tunneling therapy for the furcation treatment of mandibular second molar with narrow furcation entrance diameter. 本文提出有关下颚第二大臼齿根叉齿槽骨病变合并根叉入口径狭窄的牙齿分割合并牙冠隧道穿通术的牙周补缀治疗。
When using the attachment prostheses to restore the type of the second molar distal-extension for the patient, we can use one teeth as abutment. 用该附著体修复第二磨牙末端游离缺损时,可采用单基牙。
Result:the three-dimensional finite element method models of the maxillary second molar was constructed on the computer, which had 21809 nodes and 14449 tetrahedrons elements. 结果:在计算机上建立了上颌第二磨牙三维有限元生物力学分析模型,总节点为21809个,4面单元数为14449个。
CONCLUSIONS: When using the attachment prostheses to restore the type of the second molar distal-extension for the patient, we can use one teeth as abutment. 结论:用该附著体修复第二磨牙末端游离缺损时,可采用单基牙。
The greatest mesial tipping was observed in the lower second molars.The greatest distal tipping was observed in the lower lateral incisors. 下颚除正门齿与侧门齿以外，其他牙齿皆为近心倾斜，最大近心倾斜为第二大臼齿，最大远心倾斜则为侧门齿。
Excessive mesial-axial inclination of the mandibular second molar or inadequate posterior arch length cause the mandibular second molar to become impacted against the distal contour of the first permanent molar. 摘要下颚牙弓空间不足或第二大臼齿本身过度的近心轴向倾斜，常造成第二大臼齿前倾和阻生。
Mesial tipping occurred in all teeth except the upper second molars, the lower central incisors, and the lower lateral incisors. 测量牙冠舌侧近远心倾斜与颊舌侧斜角度，结果显示，上颚除第二大臼齿以外，其他牙齿皆为近心倾斜，最大近心倾斜为犬齿。
In 37 cases, the percentage of weak anchorage design was 55.8%, medium anchorage design was 39.5%, which meant space closure of first molar depended on forward movement of second molar. 按单颌来看;第二磨牙弱支抗设计的有55.;8%25;中度支抗设计的有39
Several methods have been proposed for unlocking impacted permanent second molar, the technique of choice would be determined by such factors as the efficiency and convenience of appliance, the preparation of anchorage and the undesired side effect. 因此当发现第二大臼齿无法顺利萌发，通常会建议病患以矫正方式扶正以获得良好的咬合。
Based on the BET specific surface determination, it is showed that the prepared photo catalyst TSO has advantageous of large specific surface area, high dispersibility and lower second pollution. 通过BET比表面积测定发现,制得的光催化剂TSO具有比表面积大、分散性高和二次污染小等优点。