牙折的病因及治療方法-文庫(kù)吧在線文庫(kù)
【正文】 cteristics Treatment and prevention 改善勞動(dòng)條件 局部藥物脫敏 缺損嚴(yán)重者可充填法、修復(fù)法處理。 主要由無(wú)機(jī)酸，如鹽酸、硝酸等所致，其中以鹽酸的危害最大。 Clinic characteristics 咀嚼磨損 非咀嚼磨損 磨損 牙本質(zhì)暴露 修復(fù)性牙本質(zhì) 牙髓腔體積縮小 Pathological change 均勻適宜的磨損對(duì)牙周組織的健康有重要意義 Physiological meaning 牙本質(zhì)過(guò)敏癥 食物嵌塞 牙髓和根尖周病 顳下頜關(guān)節(jié)紊亂病 創(chuàng)傷合 創(chuàng)傷性潰瘍 Syndrome 生理性磨損，如無(wú)癥狀無(wú)需處理。 Clinic characteristics Most monly occur on maxillary molar, and secondly on mandibular crack occurs on first molar is more than that on second molar. 隱裂線 上頜 下頜 mandibular maxillar Cracked line 表淺者無(wú)癥狀，較深時(shí)，遇冷熱刺激敏感或咬合不適。 Usually have 2 or 3 surfaces,hard and smooth,toothlike color。 Fracture surface between gingival and alveolar:a postretained crown is fabricated after gingivectomy expose the fracture surface. 斷端在牙槽骨下 4mm， 牙根較長(zhǎng)，可手術(shù)或正畸方法牽引后，樁核冠修復(fù)。 無(wú)根折外傷恒牙牙髓壞死率為 38％～ 59％ 根折牙牙髓壞死率為 20％～ 24％，斷端間隙利于炎癥引流。 X片是診斷根折的重要依據(jù) Diagnosis can be carried out by radiographic examination 冠根折 crownroot fracture 以斜行多見(jiàn)， 牙髓常暴露。 If fracture surface is 4mm below the alveolar and the root length is enough ,surgical or orthodontic extrusion of the root ,to move the fracture surface to amore optimal location for final restoration 樹(shù)脂夾板固定 Composite resin splint 根折的轉(zhuǎn)歸 鈣化性愈合 結(jié)締組織性愈合 骨、結(jié)締組織聯(lián)合愈合 斷端被慢性炎癥組織分開(kāi) Connective tissue healing The fragment is separated by chronic inflammation tissue Calcified
教學(xué)課件相關(guān)推薦
鄂ICP備17016276號(hào)-1