结论：下颌第二磨牙根管变异较多。
Conclusion: The C-shape mandibular second molars would be detrimental to canals debridement and obturation.
目的：研究单根的下颌第二磨牙的根管形态。
Objective: to investigate the root canal anatomy of one-rooted mandibular second molars.
目的探索预备下颌第二磨牙C形根管的有效方法。
Objective To explore the effective method for C-shaped root canal preparation.
目的：调查下颌第二磨牙扇形根管的出现率与牙根形态的关系。
AIM: To study the relationship between root form and frequency of C-shaped canals in the mandibular second molars.
结论：下颌第二磨牙的C形根管在根管的数量和形态有较大变化。
Conclusions: C-shaped canals in mandibular second molars vary in canal number and shape.
目的：探讨下颌第二磨牙根管系统的特征及临床诊断和治疗方法。
AIM: To discuss the clinical diagnosis and treatment of root canal system of mandibular second molars.
前言： 目的：观察下颌第二磨牙缺失单端固定义齿修复的临床效果。
Objective: To observe the clinical effect of fixed cantilever prosthesis on the missing second mandibular molars.
我们描述一个案件突出一个严重的并发症，使用空气转子清除有权下颌第二磨牙。
We describe a case which highlights a serious complication of the use of an air rotor for the removal of a right second mandibular molar.
结论CBCT影像精密度高，可从三维角度分析根管，在根管治疗中诊断治疗下颌第二磨牙C型根管具有临床指导意义。
Conclusions CBCT can analyze the configuration of root canals in a three-dimensional view, which is of prime importance in the diagnosis and treatment of C-shaped canals of mandibular second molars.
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。
Objective To investigate the displacements and the stress distributions of a mandibular second molar.
结果保存修复的成功率下颌第一恒磨牙为94％，第二恒磨牙为67％。
Results The successful rate of conservative prosthetics was 94% in the first mandibular molars, while 67% in the second molars.
摘要目的探讨磨牙后区微种植体应用于下颌近中阻生第二磨牙竖直的正畸治疗方法，评估其效果。
Abstract : Objective To assess the use of microimplants in the retromolar area for the uprighting treatment of mesial impacted mandibular second molars.
目的：统计分析下颌第一、第二、第三磨牙牙冠近远中宽度、牙体长度、分根情况以及相关因素。
Objective: Statistical analysis of mandibular molar mesiodistal crown width and tooth length and development of root.
摘要目的：研究下颌第三磨牙萌出状态与第二磨牙远中邻面龋坏的相关性。
Abstract: Objective: To analyze the correlation between the eruption status of the mandibular third molar and the distal caries in the mandibular second molar.
结论：拔除下颌第二前磨牙后，第三磨牙萌出间隙明显增大，有助于下颌第三磨牙的正常萌出。
Conclusion: Mandibular second premolar after pulling, the third molar eruption clearance increased obviously, conduce to the jaw third molar normal eruption.
而且，下颌神经管在下颌第一或第二磨牙区走行与下颌下缘基本成平行状。
At 1st or 2nd molar region the mandibular canal was basically parallel with the inferior margin of the mandible.
下颌第二前磨牙是最常见的缺失的牙齿，而上颌侧切是第二大。
Mandibular second premolars are the most frequently missing teeth while maxillary lateral incisors are second-most.
下颌第二前磨牙是最常见的缺失的牙齿，而上颌侧切是第二大。
Mandibular second premolars are the most frequently missing teeth while maxillary lateral incisors are second-most.
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