95个前磨牙牙根解剖形态的研究  

Morphological characteristics of the root canal in premolars of the Chinese

作　　者：徐红梅[1] 高学军[2] 

机构地区：[1]武警总医院口腔科,100081 [2]北京大学口腔医学院口腔医院,100039

出　　处：《牙体牙髓牙周病学杂志》2008年第3期126-129,共4页Chinese Journal of Conservative Dentistry

基　　金：国家十五科技攻关计划(2004BA720A23)

摘　　要：目的:了解前磨牙根部解剖结构特点,为临床治疗提供参考。方法:收集有临床记录的人前磨牙95个,用立体显微镜观察牙根颈部、根中1/2、距根尖2 mm处横截面结构特征,并结合X线片特点、离体牙相片进行分析。结果:95个前磨牙总体上单根牙所占比例较高,但上颌第一前磨牙双根发生率在40%左右。除下颌第二前磨牙外,即使是单根牙,双根管的发生率也超过1/3,还有个别三根管的情形。根管内部结构复杂,除了常见的哑铃形,还可见C形根管。龋、楔形缺损等牙体病损,尤其在牙颈部由于第三期牙本质的沉积,会使相应部位的根管狭窄,甚至改变根管走向。结论:前磨牙根部解剖结构复杂而且较多受临床病理情况的影响,应引起临床医生的注意。AIM： To observe the root morphology and canal anatomy of chinese premolars, METHDOS： Nity-five premolars from the Chinese with clinical records were collected. After photograghy and radiography, the teeth were crossly sectioned at the root cervical plane, the middle plane and the plane 2mm coronal to the anatomic apex, The cross - sectioned planes were observed under stereomicroscope. RESULTSS ： Though single - root premolars were found to be prevalent in premolars as a whole, the frequency of double - root was proximately 40% in the first premolars. Meanwhile, more than 1/3 of the premolars tended to have two root canals, even three root canal could be found. The anatomy of root canals was complex, even C - shaped and dumbbell shaped canals could be found. Pathological stimulations such as caries and wedge - shaped defects could further narrow and change the root canal morphology. CONCLUSION ： The canal anatomy of premolars is complex and can be shaped under different pathological stimulations.

关 键 词：前磨牙 根部解剖 

分 类 号：R780.4[医药卫生—口腔医学]