论文部分内容阅读
本文就1832例下颌阻生第三磨牙x线牙片进行了读片分析。结果表明:阻生牙以垂直阻生最多,近中阻生次之,水平阻生居第三。这三类阻生牙占总数98.16％。牙根形态以直根最多,弯向远中根次之,相对弯曲根及弯向近中根较少。牙根数目以双根最多,单根次之,多根较少。第二磨牙远中邻面龋坏则是与近中阻生关系最为密切。作者认为,无论何种阻生牙,只要反复引起冠周炎或邻牙龋坏者,都应拔除。而术前常规拍摄x线牙片,了解其牙根形态及数目是顺利拔除该牙的有效途径。
In this paper, 1832 cases of impacted mandibular third molars x-ray films were read film analysis. The results showed that the highest occlusion of occlusion teeth was the highest, followed by the middle and middle occlusion, and the second resistance was the third. The three categories of impacted teeth accounted for 98.16% of the total. The root morphology of the root straight up, bent to the root of the second, relative to the curved root and bend to the proximal root less. Roots to the largest number of double root, single root second, more root less. The second molars near the midrib caries is the most closely related with near-obstruction. The author believes that no matter what kind of impacted teeth, as long as the repeated cause pericoronitis or adjacent tooth caries, should be removed. The routine preoperative x-ray film, to understand the shape and number of its roots is an effective way to successfully remove the tooth.