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什麽叫阻生牙?拔除阻生牙有什麽特殊性

Posted By vickong pun     July 8, 2021    

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什麽叫阻生牙?拔除阻生牙有什麽特殊性

 什麽叫阻生牙?拔除阻生牙有什麽特殊性?什麽叫阻生牙?拔除阻生牙有什麽特殊性牙齒在颌骨內由于位置不當,不能萌出到正常咬位置,這樣的牙稱爲阻生牙。最常見的阻生牙是下颌第三磨牙,其次是上颌第三磨牙和上颌尖牙。阻生牙牙冠周圍的牙龈常常會發炎、疼痛,嚴重時臉頰可以腫脹,張口困難,甚至全身發熱,颌下淋巴結腫大。阻生牙常常還會引起鄰牙齲病(俗稱“蟲牙”)、松動,牙槽骨吸收等症狀。所以能引起這些病變的阻生牙應該拔除。由于阻生牙位置不正,被鄰牙阻擋,有些還可能完全被骨組織包埋。因此阻生牙的拔除比拔其他牙要困難,被牙龈覆蓋的要切開牙龈,被骨包埋的要把骨去除,被鄰牙擋住的要把牙冠劈開,分片拔除。所以,拔阻生牙費時較長,術中術後可能發生的並發症也較多,如出血、斷根、鄰牙損傷、術後下唇麻木、幹槽症等。醫生應細致操作,使並發症減少到最低限度。阻生牙如圖12所示。圖12章 阻生牙

                    

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