医学信息
醫學信息
의학신식
MEDICAL INFORMATION
2014年
17期
85-86
,共2页
根管预备%根管充填%牙胶充填面积
根管預備%根管充填%牙膠充填麵積
근관예비%근관충전%아효충전면적
Root canal preparation%Root canal obturation%Gut a-percha-fil ed area
目的:通过比较逐步后退与逐步深入法两种不同预备方法预备根管后的牙胶充填面积百分数来评价两种预备方法的效果。方法选取人离体单根管前磨牙20颗(正畸治疗拔除的牙齿),分别手用K锉严格按着逐步后退法预备根管。机用镍钛器械Mtwo严格按着逐步深入法预备根管。预备后随机分为两组,分别用冷牙胶侧方充填法、热牙胶充填法,然后分别在距根尖3、7、10 mm处截断,计算出牙胶充填面积百分数,以评价何种预备方法效果最佳。结果在根尖3 mm处,两种预备充填法的牙胶充填面积百分数无显著性差异(P>0.05);而在根尖7 mm、10 mm处,逐步后退与逐步深入法有显著性差异(p<0.05)。结论在根尖7 mm、10 mm水平,逐步深入法效果明显好于逐步后退法,而在3 mm水平,两种预备的的效果无明显差别。
目的:通過比較逐步後退與逐步深入法兩種不同預備方法預備根管後的牙膠充填麵積百分數來評價兩種預備方法的效果。方法選取人離體單根管前磨牙20顆(正畸治療拔除的牙齒),分彆手用K銼嚴格按著逐步後退法預備根管。機用鎳鈦器械Mtwo嚴格按著逐步深入法預備根管。預備後隨機分為兩組,分彆用冷牙膠側方充填法、熱牙膠充填法,然後分彆在距根尖3、7、10 mm處截斷,計算齣牙膠充填麵積百分數,以評價何種預備方法效果最佳。結果在根尖3 mm處,兩種預備充填法的牙膠充填麵積百分數無顯著性差異(P>0.05);而在根尖7 mm、10 mm處,逐步後退與逐步深入法有顯著性差異(p<0.05)。結論在根尖7 mm、10 mm水平,逐步深入法效果明顯好于逐步後退法,而在3 mm水平,兩種預備的的效果無明顯差彆。
목적:통과비교축보후퇴여축보심입법량충불동예비방법예비근관후적아효충전면적백분수래평개량충예비방법적효과。방법선취인리체단근관전마아20과(정기치료발제적아치),분별수용K촤엄격안착축보후퇴법예비근관。궤용얼태기계Mtwo엄격안착축보심입법예비근관。예비후수궤분위량조,분별용랭아효측방충전법、열아효충전법,연후분별재거근첨3、7、10 mm처절단,계산출아효충전면적백분수,이평개하충예비방법효과최가。결과재근첨3 mm처,량충예비충전법적아효충전면적백분수무현저성차이(P>0.05);이재근첨7 mm、10 mm처,축보후퇴여축보심입법유현저성차이(p<0.05)。결론재근첨7 mm、10 mm수평,축보심입법효과명현호우축보후퇴법,이재3 mm수평,량충예비적적효과무명현차별。
Objective The aim of the study was to comparae step-back technique and step-down technique achived in root canals fil ed with the percentage of gut a-percha-fil ed area (PGFA) to evaluate the ef ect of two kinds of preparation methods.Methods Two groups of extracted human premolars (orthodontic treatment of pul ing teeth) and single root canals (total y 20) were instrumented,which K files strictly according to step-back technique to prepare the root canal, which nickel-titanium instrument Mtwo strictly according to step-down technique prepare the root canal, after root canal preparation randomly divided into two groups, respectively, then the root canals were fil ed as fol ows:cold lateral condensation, and continuous wave of condensation. sections of each tooth was made 3,7 and 10mm from the apex to evaluate best two kinds of preparation methods.Results No significant dif erences were found between the 2 dif erent techniques at 3mm (P>0.05);At 7mm and 10mm from the apex, step-down technique produced significantly higher than the step-back technique (P<0.05). Conclusion The step-down technique are more ef ective than the step-back technique ,but there was no significant dif erences between the 2 dif erent techniques at 3mm .