CAJ | 학술논문

背景：根尖碎屑推出量是评价根管预备器械预备效果的一项重要指标。研究表明，推出根尖孔的碎屑将引起根管治疗后疼痛，减少根尖区碎屑的推出可降低术后疼痛发生率。目的：比较新型镍钛器械自调节根管锉、ProTaper Next和传统镍钛器械ProTaper Universal预备人下颌单根管前磨牙的根尖碎屑推出量和根管清理能力。方法：将45颗离体人下颌单根管前磨牙随机均分为3组，分别使用新型镍钛器械自调节根管锉、ProTaper Next和ProTaper Universal进行根管预备，收集推出根尖孔碎屑，比较不同根管预备器械的根尖碎屑推出量；纵向劈开根管预备后的牙根，扫描电镜下观察比较3种器械的根管清理能力。结果与结论：ProTaper Universal组的根尖碎屑推出量显著高于ProTaper Next和自调节根管锉组(P <0.05)， ProTaper Next组和自调节根管锉组的根尖碎屑推出量比较差异无显著性意义(P >0.05）。自调节根管锉组预备后根管壁的碎屑和玷污层去除能力优于ProTaper Next组和ProTaper Universal组(P <0.05)，ProTaper Next组和ProTaper Universal组预备后根管壁的碎屑和玷污层去除能力比较差异无显著性意义(P >0.05)。表明新型镍钛器械自调节根管锉和ProTaper Next的根尖碎屑推出量较传统镍钛器械ProTaper Universal少，有利于减少根管治疗后疼痛的发生率；自调节根管锉预备后根管清洁度优于ProTaper Next和ProTaper Universal。
배경：근첨쇄설추출량시평개근관예비기계예비효과적일항중요지표。연구표명，추출근첨공적쇄설장인기근관치료후동통，감소근첨구쇄설적추출가강저술후동통발생솔。목적：비교신형얼태기계자조절근관촤、ProTaper Next화전통얼태기계ProTaper Universal예비인하합단근관전마아적근첨쇄설추출량화근관청리능력。방법：장45과리체인하합단근관전마아수궤균분위3조，분별사용신형얼태기계자조절근관촤、ProTaper Next화ProTaper Universal진행근관예비，수집추출근첨공쇄설，비교불동근관예비기계적근첨쇄설추출량；종향벽개근관예비후적아근，소묘전경하관찰비교3충기계적근관청리능력。결과여결론：ProTaper Universal조적근첨쇄설추출량현저고우ProTaper Next화자조절근관촤조(P <0.05)， ProTaper Next조화자조절근관촤조적근첨쇄설추출량비교차이무현저성의의(P >0.05）。자조절근관촤조예비후근관벽적쇄설화점오층거제능력우우ProTaper Next조화ProTaper Universal조(P <0.05)，ProTaper Next조화ProTaper Universal조예비후근관벽적쇄설화점오층거제능력비교차이무현저성의의(P >0.05)。표명신형얼태기계자조절근관촤화ProTaper Next적근첨쇄설추출량교전통얼태기계ProTaper Universal소，유리우감소근관치료후동통적발생솔；자조절근관촤예비후근관청길도우우ProTaper Next화ProTaper Universal。
BACKGROUND:Amount of debris extruded apicaly is an important indicator to evaluate the effect of root canal preparation instrument. Studies have shown that debris extruded apicaly can cause post-treatment pain, and thus, reducing the amount of debris extruded apicaly can decrease the incidence of post-treatment pain. OBJECTIVE:To compare the root canal cleanness and the amount of apicaly extruded debris during root canal preparation with Self-adjusting files, ProTaper Next and ProTaper Universal. METHODS:Forty-five premolars with single canal were divided into three groups randomly, and then prepared by Self-adjusting files, ProTaper Next and ProTaper Universal, respectively. Debris extruded apicaly was colected, dried and weighed. Then roots were longitudinaly sectioned and observed under scanning electronic microscope to evaluate the cleanness of the root canal. RESULTS AND CONCLUSION:The amount of apicaly extruded debris in the ProTaper Universal group was significantly higher than that in the Self-adjusting files group and ProTaper Next group (P < 0.05), but there were no statisticaly significant differences between the groups of Self-adjusting files and ProTaper Next in apicaly extruded debris (P > 0.05). Scores on debris and smear layer were lower in the group of Self-adjusting files than the groups of ProTaper Next and ProTaper Universal (P < 0.05), but there was no difference between the latter two groups (P > 0.05). These findings indicate that the Self-adjusting files and ProTaper Next can extrude less debris beyond the apical foramen, which may decrease the incidence of post-treatment pain. Cleaning ability of Self-adjusting files is better than ProTaper Next and ProTaper Universal.