牙折的病因及治療方法-免費(fèi)閱讀
【正文】 多發(fā)生于前牙唇面。 Treatment 不均勻磨損需調(diào)合。 隱裂線 碘酊等可滲入隱裂處 探針撬動隱裂處有疼痛感，棉簽置可疑牙尖上咬合，有撕裂樣疼痛。 Correct tooth brushing Treatment and prevention Careful observation if there is no tooth sensitivity and the lesions are small 有牙本質(zhì)過敏，可用藥物、激光等脫敏。 The tooth with crownroot fracture which can be restored by a post retained full crown should be saved to receive RCT 發(fā)生在牙根的縱裂 ,未波及牙冠者。 The fracture will often be inclined with pulp exposure 缺損少牙本質(zhì)未暴露，磨光銳邊。 有的早期無明顯癥狀，數(shù)日后出現(xiàn)。 Check for pulpal plications after 1 month,3 months,6 months and 12 pulp necrosis occurs,root canal therapy should be done. 頸 1/3折斷：均先行根管治療 斷端在齦上，根管治療后樁核冠修復(fù) Cervixthirds fracture:root canal therapy should be done If fracture surface above gingival level,a postretained full crown is fabricated after RCT. 斷端在齦下牙槽骨上，齦切暴露斷面樁核冠修復(fù)。 Wedgeshaped defect is caused by tardy abrasion of buccal cervix hard tissues. 刷牙不當(dāng) 牙頸部結(jié)構(gòu) Structure of tooth cervix Improper teeth brushing Etiology 酸作用 牙體組織疲勞 Acid erosion Weariness of hard tissues 由 2～ 3個平面組成，堅硬光滑，為牙本色。 Fine nonphysiological crack on the surface of the crown 牙齒結(jié)構(gòu)薄弱環(huán)節(jié) 牙尖斜度大 創(chuàng)傷合力 Weak tache of tooth structure Big cuspid pitch Traumatic occlusal force Etiology 隱裂牙發(fā)生于上頜磨牙最多，其次是下頜磨牙，第一磨牙多于第二磨牙。 Treatment Seal the dentinal tubule to decrease or avoid the flowing of the liquid inside dentin
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