teeth root

Results Lesions of teeth root tips and alveolar bone loss in 69 cases of chronic renal failure with dialysis progressively destroy with long time of dialysis.(结果69例慢性肾衰长期血透的病人随着血透时间的延长，牙槽骨和牙根的损害也越严重。)

METHODS: 25 extracted human maxillary anterior teeth, with a single straight root were randomly divided into 5 groups. They were instrumented with K-files and conventional preparation technique.(方法：25颗离体直根管前牙，随机分为5组，不锈钢K锉常规法预备根管，应用5种冲洗剂组合进行冲洗。)

The tooth also had all the components of normal teeth, including enamel, crown and root, and connective fibers to fix it to bone.(培育的牙齿还具备正常牙齿的所有组成成分，包括釉质、齿冠和牙根，以及使其固定于骨头的结缔组织纤维。)

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。)

Conclusion: the rate of root resorption of two methods are consistent, there's no relationship between the root resorption of the teeth transportation distance or treatment time.(结论：两种治疗方法的牙根吸收率是一致的；牙根吸收率与牙齿移动距离和受力时间没有关系。)

I have a root canal filling in one of my teeth. The tooth is changing color. Can anything be done about it?(我有一颗牙在牙根管里补过。现在这颗牙变了颜色，有什么办法可以解决？)

The impacted teeth are often with malformation of the root.(埋伏同时常伴有牙根畸形。)

But finished his teeth root canal therapy usually will gradually change color, front teeth may affect the appearance, if the patient care, can be done on metal ceramic tooth or all-ceramic crowns.(但做完根管治疗的牙齿通常会慢慢变色，在前牙可能会影响美观，若病人在意的话，可做上金属瓷牙或全瓷冠。)

Objective To investigate the bacterial composition of infected root canal of human deciduous teeth with deep caries.(目的本研究的目的是对患有深龋的乳牙根管内细菌进行分析。)

Objective To discuss the clinical effects and feasibility of repairing old root canal perforation of front teeth using DMG calcium hydroxide.(目的探讨DMG光固化氢氧化钙修补前牙陈旧性根管穿孔的临床效果及可行性。)