【大学课件】牙折的病因及治疗方法.ppt
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1、,tooth fracture,http:/ be impacted by force,biting hard food.,Etiology,http:/ characteristics,按部位分:,冠折,Crown fracture,根折,Root fracture,冠根联合折,http:/ crown fracture,前牙 : 横折、斜折,Anterior tooth: horizontal or inclined,http:/ : 斜折、纵折,Posterior teeth:inclined or vertical,http:/ root fracture,http:/ 1/3、根中
2、1/3、根尖 1/3,cervix-thirds,middle-thirds,apical-thirds,http:/ 3859,根折牙牙髓坏死率为2024,断端间隙利于炎症引流。,http:/ can be carried out by radiographic examination,http:/ crown-root fracture,http:/ fracture will often be inclined with pulp exposure,http:/ Treatment,缺损少牙本质未暴露,磨光锐边。,冠折 crown fracture,Without dentin expo
3、sure,selective grinding of the incisal edge is sufficient.,http:/ with Ca(OH)2 and composite resin restoration if dentin is expose and sensitive,http:/ case of a pulp exposure,pulpectomy is indicated if the root apical is developed,pulpotomy is sufficient if the root apical is developing.,http:/ roo
4、t fracture,根中1/3折,根尖1/3折 middle-thirds,apical-thirds,用夹板固定三个月,如牙冠端有错位,在固定前应复位。,Reposition the coronal fragment and use splinting for 3 months,http:/ for pulpal complications after 1 month,3 months,6 months and 12 months.If pulp necrosis occurs,root canal therapy should be done.,http:/ fracture:root
5、canal therapy should be done,If fracture surface above gingival level,a post-retained full crown is fabricated after RCT.,http:/ surface between gingival and alveolar:a post-retained crown is fabricated after gingivectomy expose the fracture surface.,http:/ fracture surface is 4mm below the alveolar
6、 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,http:/ resin splint,http:/ tissue healing,The fragment is separated by chronic inflammation tissue,Calcified healing,Hard-connective tissue unio
7、n healing,Healing of root fracture,http:/ fracture:,可作根管治疗,具备桩核冠修复的冠根联合折,应保留。,The tooth with crown-root fracture which can be restored by a post retained full crown should be saved to receive RCT,http:/ root fracture,发生在牙根的纵裂,未波及牙冠者。,Vertical root fracture, not involving the crown.,http:/ durative t
8、raumatic occlusal force,Defect of root development,Pulpless tooth,http:/ tooth,内因:牙本质脱水,失去弹性,牙变 脆,致使牙抗折力降低。,外因:,侧方加压充填根管,桩或桩核修复,其他,http:/ can be carried out by radiographic examination,Clinic characteristics,http:/ tooth should be extracted if it is very loose or of severe periodontal lesion or vert
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