The brittleness and cold temperatures of ice cubes can actually cause teeth to fracture.
冰块的脆性和低温竟然能致牙齿断裂。
Conclusion the fracture strength of premolar teeth filled with light curing composite resin was higher than filled with amalgam after root canal therapy.
结论根管治疗后用光固化树脂充填前磨牙的各类洞，牙体的抗折强度优于用银汞充填者。
Root canal treatment and finished tooth, lost in the pulp cavity nutrition supplies such as nerves, blood vessels, lymphatic, makes itself become more brittle fracture of teeth.
且做完根管治疗的牙齿，失去了牙髓腔中神经、血管、淋巴等营养供应，使得牙齿本身变得较脆易断裂。
Objective:To observe the clinical effect of tooth extrusion with progressive methods for anterior teeth with crown-root fracture.
目的观察牙冠延长术治疗断缘位于龈下的冠根联合折断牙的临床效果。
Methods 16 cases with fracture or exfoliation on the area of anterior teeth and premolar were selected, the damage's parts of prosthesis were recorded, and the causes of failure were analyzed.
方法随机选择16例前牙和前磨牙区因瓷裂或瓷崩而导致失败的病例，记录修复体损坏的部位，分析产生失败的原因。
Objective To compare the fracture resistance and fracture modes of teeth restored with four diferent post-and-core systems.
比较纤维桩核系统和金属铸造桩核系统修复后牙体组织的抗折裂强度和折裂模式。
Methods with fragments of the back teeth bow orthodontic traction treatment between technical joint jaws in 31 cases of patients with mandibular Angle fracture and watch curative effect.
方法在后牙用片段弓正畸技术联合颌间牵引治疗31例下颌角骨折的患者并观察疗效。
Method47 cases with fracture or exfoliation on the area of anterior teeth, premolar and molar were selected, the damage's pares of prosthesis were recorded, and the causes of failure were analyzed.
方法随机选择临床47例前牙和后牙瓷裂或瓷崩失败病例，记录修复体损坏的部位，分析产生失败的原因。
Conclusion: Tooth extrusion method with new method is an effective method for anterior teeth with crown-root fracture.
结论：使用改进的固定矫正器进行牙根牙合向牵引治疗前牙冠根折的方法有效可行。
Objective: To study the clinical therapeutic effect of the prosthesis of longitudinal fracture posterior teeth.
目的：探讨后牙纵折修复治疗的临床效果。
The method can debase the possibility of the tooth fracture during and after treatment. Methods The patients with cracked teeth have the symptom of pulpitis or periapical periodontitis.
方法选择在口腔门诊首次就诊的具有牙髓炎或根尖周炎症状的隐裂牙，采用预成金属冠修复后再作牙髓病治疗。
Conclusion: If taken for lacking of effective treatment on teeth fracture of prevention methods, then the fracture molar can be conserved.
结论：牙折裂只要采取及时有效的治疗，部分患牙是可以保留的。
Objective To observe the clinical efficacy of endodontic-orthodontic combined treatment for anterior teeth with crown-root fracture.
目的观察牙体牙髓-正畸方法联合处理恒上前牙冠根折的临床疗效。
Dental trauma may happen to a single tooth or more. Avulsion was most like to accompany with other traumatic teeth. Crown fracture was also like to involve more than one tooth.
牙创伤可以在单颗牙齿发生也可累及多颗牙，牙脱出最容易累及多颗牙，冠折也常累及多颗牙。
Abstract: Objective to compare the restorative effects of crown lengthening surgery and gingivectomy on dowel crown of deep-seated subgingival teeth fracture.
摘要：目的比较牙冠延长术与牙龈切除术用于残根残冠桩冠修复中的疗效。
CONCLUSION: Posterior teeth with vertical fracture, extraction may be avoided if prompt diagnoses and consummate treatment were performed.
结论：后牙纵折后及时诊断并经过完善治疗，可以保存患牙而避免拔牙。
PURPOSE: To explore the ideal method for conservative therapies of posterior teeth with longitudinal fracture.
目的：探索纵折后牙保存治疗的理想方法。
Methods 105 fracture molar teeth in 92 patients, treated pulp normally fulled and fixed it and then repair the whole coronary.
方法选择92例患者的105颗磨牙折裂，完成牙体根管治疗，桩核制作并进行金属全冠或烤瓷全冠修复。
In cast metal post and core group 4 teeth were found root fracture, 3 cast metal post and core were loose and 8 teeth were with gingival grey line.
而铸造金属桩核组发生根折4颗、铸造金属桩核脱落3颗，出现牙龈色素沉着8颗。
Results:Of the teeth, 61.2% were prosthetic failures which were due primarily to crown fracture. 29.8% were periodontal failures.
结果：与修复有关的失败占6 1 .2 % ，其中主要是冠折。与牙周疾病有关的失败占2 9.8%。
Methods 16 cases with fracture or exfoliation on the area of anterior teeth and premolar were selected, the damages parts of prosthesis were recorded, and the causes of failure were analyzed.
方法随机选择16例前牙和前磨牙区因瓷裂或瓷崩而导致失败的病例，记录修复体损坏的部位，分析产生失败的原因。结果瓷裂或瓷崩发生在切缘的病例数为10例占6 2。
Methods 16 cases with fracture or exfoliation on the area of anterior teeth and premolar were selected, the damages parts of prosthesis were recorded, and the causes of failure were analyzed.
方法随机选择16例前牙和前磨牙区因瓷裂或瓷崩而导致失败的病例，记录修复体损坏的部位，分析产生失败的原因。结果瓷裂或瓷崩发生在切缘的病例数为10例占6 2。
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