重庆医学
重慶醫學
중경의학
CHONGQING MEDICAL JOURNAL
2014年
34期
4563-4565
,共3页
牙根%牙本质%根管预备%椭圆形根管
牙根%牙本質%根管預備%橢圓形根管
아근%아본질%근관예비%타원형근관
vertical root%dentin%root canal preparation%oval shaped canal
目的:通过观察3种新型镍钛机动器械预备椭圆形根管后牙根牙本质微裂情况,比较不同根管预备器械对根管预备后牙根抗折能力的影响。方法收集65个具有椭圆形单根管的下颌前牙,分为3个试验组(每组n=20)和对照组(n=5),试验组分别用自调节锉(SAF)、ProTaper Universal和ProTaper Next进行根管预备,对照组不进行根管预备。离根尖3、6、9 mm处横断牙根,体视显微镜下评估牙本质微裂情况。结果 ProTaper Universal组根折发生率高于 ProTaper Next组和 SAF组(P<0.05)。ProTaper Next组和SAF组的牙根折裂发生率比较,差异无统计学意义(P>0.05)。结论新型镍钛器械ProTaper Next和 SAF根管预备后牙本质微裂形成少,能降低根管治疗后牙根折裂风险。
目的:通過觀察3種新型鎳鈦機動器械預備橢圓形根管後牙根牙本質微裂情況,比較不同根管預備器械對根管預備後牙根抗摺能力的影響。方法收集65箇具有橢圓形單根管的下頜前牙,分為3箇試驗組(每組n=20)和對照組(n=5),試驗組分彆用自調節銼(SAF)、ProTaper Universal和ProTaper Next進行根管預備,對照組不進行根管預備。離根尖3、6、9 mm處橫斷牙根,體視顯微鏡下評估牙本質微裂情況。結果 ProTaper Universal組根摺髮生率高于 ProTaper Next組和 SAF組(P<0.05)。ProTaper Next組和SAF組的牙根摺裂髮生率比較,差異無統計學意義(P>0.05)。結論新型鎳鈦器械ProTaper Next和 SAF根管預備後牙本質微裂形成少,能降低根管治療後牙根摺裂風險。
목적:통과관찰3충신형얼태궤동기계예비타원형근관후아근아본질미렬정황,비교불동근관예비기계대근관예비후아근항절능력적영향。방법수집65개구유타원형단근관적하합전아,분위3개시험조(매조n=20)화대조조(n=5),시험조분별용자조절촤(SAF)、ProTaper Universal화ProTaper Next진행근관예비,대조조불진행근관예비。리근첨3、6、9 mm처횡단아근,체시현미경하평고아본질미렬정황。결과 ProTaper Universal조근절발생솔고우 ProTaper Next조화 SAF조(P<0.05)。ProTaper Next조화SAF조적아근절렬발생솔비교,차이무통계학의의(P>0.05)。결론신형얼태기계ProTaper Next화 SAF근관예비후아본질미렬형성소,능강저근관치료후아근절렬풍험。
Objective To compare the effect of different nickel-titanium rotary files on fracture resistance of teeth by observing status of dentinal microcracks after root canal preparation with.Methods 6 5 mandibular anterior teeth with single oval canal were randomly divided into three experimental groups (n=20)and a control group (n=5),SAF、ProTaper Universal and ProTaper Next system were used to prepare root canal in experimental groups,while the control group were left unprepared.Roots were sectioned from 3,6,9 mm to the apex,its status of dentinal microcracks was evaluated under a stereomicroscope.Results Root fracture inci-dence rate of group ProTaper Universal was significantly higher than that of group SAF and group ProTaper Next (P<0.05). There were no statistically significant differences in incidence rate of dentinal microcracks between group SAF and group ProTaper Next (P>0.05).Conclusion Roots with oval shaped canal prepared with SAF and ProTaper Next produce less dentinal microc-racks,which decrease risk of vertical root fracture.