CAJ | 학술논문

目的：???研究兰州市部分成人离体前磨牙的解剖外形及其根管的解剖形态特点。方法??收集兰州市成人离体前磨牙190颗，其中上颌第一前磨牙54颗，上颌第二前磨牙46颗，下颌第一前磨牙50颗，下颌第二前磨牙40颗，用精度为0.02?mm的游标卡尺测量收集到的前磨牙的牙体各项长度指标，通过锥形束CT资料观察根管形态及类型，使用SPSS?13.0软件行统计学分析。结果???获得兰州市部分成人离体前磨牙解剖形态和根管类型数据，牙体各项指标测量值均呈正态分布，牙根长度和牙体长度差异较大，前磨牙的根管形态以Ⅰ型和Ⅳ型为主。结论???前磨牙解剖外形特征总体稳定，但根长和牙长的变异情况较大，在临床操作中应予以注意。
목적：???연구란주시부분성인리체전마아적해부외형급기근관적해부형태특점。방법??수집란주시성인리체전마아190과，기중상합제일전마아54과，상합제이전마아46과，하합제일전마아50과，하합제이전마아40과，용정도위0.02?mm적유표잡척측량수집도적전마아적아체각항장도지표，통과추형속CT자료관찰근관형태급류형，사용SPSS?13.0연건행통계학분석。결과???획득란주시부분성인리체전마아해부형태화근관류형수거，아체각항지표측량치균정정태분포，아근장도화아체장도차이교대，전마아적근관형태이Ⅰ형화Ⅳ형위주。결론???전마아해부외형특정총체은정，단근장화아장적변이정황교대，재림상조작중응여이주의。
Objective???This?study?investigates?the?morphology?and?root?canal?system?of?premolars.?Methods???A?total?of?190?permanent?premolars?were?collected?from?subjects?in?Lanzhou:?54?maxillary?first?premolars,?46?maxillary?second?premolars,?50?mandibular?first?premolars,?and?40?mandibular?second?premolars.?Vernier?was?used?to?measure?the?length?indexes.?Macrography?was?used?to?observe?the?morphology?of?roots,?and?the?cone?beam?CT?technique?was?used?to?investigate?the?root?canal?systems.?The?data?were?analyzed?by?using?SPSS?13.0.?Results???The?anatomic?data?of?the?permanent?premolars?and?root?canal?systems?of?the?subjects?from?Lanzhou?were?obtained.?All?indexes?were?assumed?to?have?a?normal?distribution,?e.g.,?root?length?and?tooth?length?varied.?The?major?root?canal?types?of?the?permanent?premolars?are?types?Ⅰ?and?type?Ⅳ.?Conclusion???Results?showed?that?the?anatomy?of?permanent?premolars?is?wholly?stable,?but?the?lengths?of?the?teeth?and?root?are?not.?Hence,?caution?should?be?observed?when?operating?on?these?teeth.