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.(結果69例慢性腎衰長期血透的病人隨著血透時間的延長，牙槽骨和牙根的損害也越嚴重。)

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顆離體直根管前牙，隨機分為5組，不銹鋼K銼常規法預備根管，應用5種沖洗劑組合進行沖洗。)

The tooth also had all the components of normal teeth, including enamel, crown and root, and connective fibers to fix it to bone.(培育的牙齒還具備正常牙齒的所有組成成分，包括釉質、齒冠和牙根，以及使其固定于骨頭的結締組織纖維。)

Conclusion the fracture strength of premolar teeth filled with light curing composite resin was higher than filled with amalgam after root canal therapy.(結論根管治療后用光固化樹脂充填前磨牙的各類洞，牙體的抗折強度優于用銀汞充填者。)

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.(結論：兩種治療方法的牙根吸收率是一致的；牙根吸收率與牙齒移動距離和受力時間沒有關系。)

I have a root canal filling in one of my teeth. The tooth is changing color. Can anything be done about it?(我有一顆牙在牙根管里補過。現在這顆牙變了顏色，有什么辦法可以解決？)

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

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.(但做完根管治療的牙齒通常會慢慢變色，在前牙可能會影響美觀，若病人在意的話，可做上金屬瓷牙或全瓷冠。)

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對患有深齲的乳牙根管內細菌進行分析。)

Objective To discuss the clinical effects and feasibility of repairing old root canal perforation of front teeth using DMG calcium hydroxide.(目的探討DMG光固化氫氧化鈣修補前牙陳舊性根管穿孔的臨床效果及可行性。)