CAJ | 학술논문

目的：??比较4种机用镍钛器械预备树脂模拟弯曲根管的成形能力，为临床应用提供实验依据。方法??40个单弯树脂模拟根管随机分为4组，每组10个，分别使用Reciproc（组1）、WaveOne（组2）、Mtwo（组3）和ProTaper （组4）进行根管预备，记录4组的预备时间，测量预备后根管的工作长度；使用扫描仪获取4组预备前后的根管图像，使用Photoshop和?Image?J软件进行图像重叠并测量预备后根管弯曲角度的变化值，从距根尖孔1?mm开始，每隔1?mm测量根管内外侧壁树脂去除量，共10个测量点，计算中心定位能力。使用单因素方差分析、Kruskal-Wallis检验和SNK检验进行统计学分析，检验水准为双侧α=0.05。结果??组2预备时间最短，为（53.7±6.7）s，组1、组3和组4分别为（86.9±8.1）、（112.2±8.2）、（177.9±11.2）s，4组间差异有统计学意义（P<0.05）。4种器械预备前后根管工作长度变化的差异无统计学意义（P>0.05）。组1、组2、组3、组4根管弯曲角度变化值分别为（2.671±0.637）°?、（2.667±0.450）°、（3.664±0.870）°、（3.797±0.601）°，组1和组2的变化值显著小于组3和组4（P<0.05）。在距根尖孔3?mm位点，组1的偏移程度为（-0.016±0.094）?mm，显著小于其余3组（P<0.05）；在距根尖孔4?mm和5?mm处，组2的偏移程度分别为（-0.080±0.104）?mm和（-0.312±0.088）?mm，显著小于组1?[（-0.243±0.099）?mm和（-0.404±?0.064）?mm，P<0.05]。结论??Reciproc和WaveOne可快速有效地预备根管，且可较好地保持树脂弯曲根管的原始形态；Reciproc在根尖区具有较好的中心定位能力，WaveOne在根管弯曲中段部分具有较好的中心定位能力。
목적：??비교4충궤용얼태기계예비수지모의만곡근관적성형능력，위림상응용제공실험의거。방법??40개단만수지모의근관수궤분위4조，매조10개，분별사용Reciproc（조1）、WaveOne（조2）、Mtwo（조3）화ProTaper （조4）진행근관예비，기록4조적예비시간，측량예비후근관적공작장도；사용소묘의획취4조예비전후적근관도상，사용Photoshop화?Image?J연건진행도상중첩병측량예비후근관만곡각도적변화치，종거근첨공1?mm개시，매격1?mm측량근관내외측벽수지거제량，공10개측량점，계산중심정위능력。사용단인소방차분석、Kruskal-Wallis검험화SNK검험진행통계학분석，검험수준위쌍측α=0.05。결과??조2예비시간최단，위（53.7±6.7）s，조1、조3화조4분별위（86.9±8.1）、（112.2±8.2）、（177.9±11.2）s，4조간차이유통계학의의（P<0.05）。4충기계예비전후근관공작장도변화적차이무통계학의의（P>0.05）。조1、조2、조3、조4근관만곡각도변화치분별위（2.671±0.637）°?、（2.667±0.450）°、（3.664±0.870）°、（3.797±0.601）°，조1화조2적변화치현저소우조3화조4（P<0.05）。재거근첨공3?mm위점，조1적편이정도위（-0.016±0.094）?mm，현저소우기여3조（P<0.05）；재거근첨공4?mm화5?mm처，조2적편이정도분별위（-0.080±0.104）?mm화（-0.312±0.088）?mm，현저소우조1?[（-0.243±0.099）?mm화（-0.404±?0.064）?mm，P<0.05]。결론??Reciproc화WaveOne가쾌속유효지예비근관，차가교호지보지수지만곡근관적원시형태；Reciproc재근첨구구유교호적중심정위능력，WaveOne재근관만곡중단부분구유교호적중심정위능력。
Objective ??This?study?aims?to?evaluate?the?shaping?capability?of?Reciproc,?WaveOne,?Mtwo,?and?ProTaper?instruments?in?simulated?root?canals. Methods ??A?total?of?40?simulated?resin?blocks?were?divided?randomly?into?four?groups.?Each?group?was?prepared?with?Reciproc?(Group?1),?WaveOne?(Group?2),?Mtwo?(Group?3),?and?ProTaper?(Group?4).?The?pre-paration?time?and?reduction?in?working?length?after?preparation?were?measured.?Pre-?and?post-operative?images?were?obtained?with?a?scanner?and?superimposed?through?Photoshop.?The?changes?in?canal?curvature?and?material?removal?from?the?inner?and?outer?canal?walls?at?10?points?beginning?at?1?mm?from?the?end?point?of?the?canal?were?measured?with?Image?J.?Centering?capability?was?determined?accordingly.?Data?were?analyzed?through?one-way?ANOVA,?SNK,?and?Kruskal–Wallis?at?a?signi-ficance?level?of?P<0.05.?Results ??The?preparation?time?of?Group?2?was?(53.7±6.7)?s,?whereas?those?of?Groups?1,?3,?and?4?were?(86.9±8.1)?s,?(112.2±8.2)?s,?and?(177.9±11.2)?s,?respectively;?the?difference?was?found?to?be?significant?(P<0.05).?The?reduc-tions?in?working?length?among?the?four?groups?after?preparation?were?not?significantly?different?(P>0.05).?The?canal?curvature?for?Groups?1?to?4?were?2.671°±0.637°,?2.667°±0.450°,?3.664°±0.870°,?and?3.797°±0.601°,?respectively.?The?changes?for?Groups 1?and?2?were?significantly?smaller?than?those?for?Groups?3?and?4.?At?the?3?mm?point,?the?transportation?of?Group?1?was?(-0.016± 0.094)?mm,?which?was?significantly?less?than?that?of?the?other?instruments?(P<0.05).?At?the?4?mm?and?5?mm?points,?the?trans-portation?values?of?Group?2?were?(-0.080±0.104)?mm?and?(-0.312±0.088)?mm,?which?were?significantly?less?than?that?of?Group?1?[(-0.243±0.099)?mm,?(-0.404±0.064)?mm,?P<0.05].?Conclusion ??Reciproc?and?WaveOne?can?complete?prepa-ration?faster?and?can?maintain?the?original?canal?curvature?better?than?Mtwo?and?ProTaper.?Reciproc?exhibits?superior?centering?capability?in?the?apical?part?of?the?canal,?whereas?WaveOne?exhibits?superior?centering?capability?in?the?middle?part?of?the?canal.