阻生牙的拔除ppt課件

1、下頜阻生智慧牙拔除,,下頜阻生智齒分類一,下頜阻生智齒分類Classification of impaction of mandibular third molars,第一種分類方法：1 近中傾斜 Mesioangular 2 遠(yuǎn)中傾斜 distoangular3 垂直 vertical4 水平 horizontal 5 頰向 buccoangular 6 舌向 linguoangular 7 倒置 inver

2、ted,,下頜阻生智齒分類二,下頜阻生智齒分類二,第二種分類方法：,a1 高位 The occlusal surface of the impacted tooth is at the same level as, or a little below that of,the second molara2 中位The occlusal surface of the impacted tooth is at the middle of t

3、he crown of the secondmolar or at the same level as the cervical linea3 低位The occlusal surface of the impacted tooth is below the cervical line of the second molar,下頜阻生智齒分類二,第二種分類方法：,b1 間隙大于牙冠 The distance between the s

4、econd molar and the anterior border of the ramus is greater than themesiodistal diameter of the crown of the impacted tooth, so that its extraction does not require bone removal from the region ofthe ramusb2間隙小于牙冠 The d

5、istance is less and the existing space is less than the mesiodistal diameter of the crown of the impacted toothb3 沒有間隙There is no room between the second molar and the anterior border of the ramus, so that the entire im

6、pacted tooth or part of it is embedded in the ramus,我臨床上的分類,二大類：水平阻生和垂直阻生所有的牙齒都可歸為此二類再綜合前面所講到的二種分類方法和牙根的情況進(jìn)行詳細(xì)分類描敘，這樣的分類更加有利于臨床實踐，有利于拔牙手術(shù)的難度評估,水平阻生,,水平阻生 113068,,水平高位、根粗大 109058,,中位 骨覆蓋 114077,,水平　低位　粗根１０７９８０,,水平　遠(yuǎn)中骨阻

7、生　空間小　根多個 １０２７５６,,水平　鄰牙遠(yuǎn)中骨吸收　根細(xì)113504,,水平 根粗大 鄰牙遠(yuǎn)中骨吸收嚴(yán)重 齲損 １１４７４３,,水平　根分叉大　空間小１１３０７８,,水平阻生　根分叉大１１０９０９,,水平　根分叉大　鄰牙遠(yuǎn)中骨吸收１１２０５５,,水平 極低位 37根尖區(qū)113074,,垂直阻生,,高位　遠(yuǎn)中骨阻生　牙齦覆蓋１１３７７８,,垂直　牙巨大　遠(yuǎn)中骨阻生１０８１７９,,垂直　遠(yuǎn)中骨阻生　空間?。罚埃福罚?

8、,垂直　４８低位彎根遠(yuǎn)中骨阻生４７牙根吸收３８遠(yuǎn)中骨阻生空間小較難１１３０７２,,垂直遠(yuǎn)中骨阻生空間小較難１１３０９３,,遠(yuǎn)中骨阻生偏頰側(cè)遠(yuǎn)中牙挺難下去無間隙１１０９０１,,垂直低位遠(yuǎn)中骨阻力近下頜神經(jīng)管１１２８５９,,難度大的牙,增加拔牙難度的因素,巨大牙牙根長、粗大、多根、彎曲、分叉大骨埋伏低位于鄰牙，去骨難度大——垂直低位骨埋伏鄰牙的根分叉頰舌向象水平低位，挺不好使力頰部胖，暴露不充分牙根骨粘連,３８頰舌向水平低