郑州大学学报（医学版）
鄭州大學學報（醫學版）
정주대학학보（의학판）
JOURNAL OF ZHENGZHOU UNIVERSITY(MEDICAL SCIENCES)
2014年
4期
559-562
,共4页
孙银珑%楚金普%闫波%徐力%姜文辉
孫銀瓏%楚金普%閆波%徐力%薑文輝
손은롱%초금보%염파%서력%강문휘
锥形束CT%下颌第一恒磨牙%根管解剖形态
錐形束CT%下頜第一恆磨牙%根管解剖形態
추형속CT%하합제일항마아%근관해부형태
cone-beam computed tomography%mandibular first molar%morphology of root canal
目的：利用锥形束CT（CBCT）研究下颌第一恒磨牙四根管在人群中的发生率以及根管系统和髓室底的解剖特点。方法：利用按照纳入标准取得的180例患者的CBCT图像资料，观察下颌第一恒磨牙四根管的发生率（包括个体发生率、牙齿发生率）及左右对称率。然后筛选出具有四根管的下颌第一恒磨牙，根据牙根数目不同分为三根型组和两根型组，每组随机抽取25例样本，利用Kodak Dental 6．12．10软件对图像进行重建，对两组的根管系统进行分型，观察根管口水平的髓室横断面，测量2组根管口水平近颊至近舌、近颊至远颊、远舌至远颊、远舌至近舌根管口的距离。结果：下颌第一恒磨牙四根管的牙齿发生率和个体发生率分别为45．1％（119/264牙）和43．3％（78/180人）。男性组左右相关系数为0．635，女性组为0．574。近中根以2-2-2型根管为主，在三根型组发生率为68．0％（17/25），两根型组为76．0％（19/25）；1-1-1型根管常见于三根型的远颊根、远舌根，发生率均为100．0％（25/25）。两根型下颌第一恒磨牙的远中根比较常见的为2-2-2型和2-2-1型，发生率依次是32．0％（8/25）、28．0％（7/25）。远颊与远舌根管口的间距差异有统计学意义（t＝8．569，P＜0．001）。结论：CBCT成像可以反映下颌第一恒磨牙四根管的解剖形态，为下颌第一恒磨牙的根管治疗提供了准确的影像学参考。
目的：利用錐形束CT（CBCT）研究下頜第一恆磨牙四根管在人群中的髮生率以及根管繫統和髓室底的解剖特點。方法：利用按照納入標準取得的180例患者的CBCT圖像資料，觀察下頜第一恆磨牙四根管的髮生率（包括箇體髮生率、牙齒髮生率）及左右對稱率。然後篩選齣具有四根管的下頜第一恆磨牙，根據牙根數目不同分為三根型組和兩根型組，每組隨機抽取25例樣本，利用Kodak Dental 6．12．10軟件對圖像進行重建，對兩組的根管繫統進行分型，觀察根管口水平的髓室橫斷麵，測量2組根管口水平近頰至近舌、近頰至遠頰、遠舌至遠頰、遠舌至近舌根管口的距離。結果：下頜第一恆磨牙四根管的牙齒髮生率和箇體髮生率分彆為45．1％（119/264牙）和43．3％（78/180人）。男性組左右相關繫數為0．635，女性組為0．574。近中根以2-2-2型根管為主，在三根型組髮生率為68．0％（17/25），兩根型組為76．0％（19/25）；1-1-1型根管常見于三根型的遠頰根、遠舌根，髮生率均為100．0％（25/25）。兩根型下頜第一恆磨牙的遠中根比較常見的為2-2-2型和2-2-1型，髮生率依次是32．0％（8/25）、28．0％（7/25）。遠頰與遠舌根管口的間距差異有統計學意義（t＝8．569，P＜0．001）。結論：CBCT成像可以反映下頜第一恆磨牙四根管的解剖形態，為下頜第一恆磨牙的根管治療提供瞭準確的影像學參攷。
목적：이용추형속CT（CBCT）연구하합제일항마아사근관재인군중적발생솔이급근관계통화수실저적해부특점。방법：이용안조납입표준취득적180례환자적CBCT도상자료，관찰하합제일항마아사근관적발생솔（포괄개체발생솔、아치발생솔）급좌우대칭솔。연후사선출구유사근관적하합제일항마아，근거아근수목불동분위삼근형조화량근형조，매조수궤추취25례양본，이용Kodak Dental 6．12．10연건대도상진행중건，대량조적근관계통진행분형，관찰근관구수평적수실횡단면，측량2조근관구수평근협지근설、근협지원협、원설지원협、원설지근설근관구적거리。결과：하합제일항마아사근관적아치발생솔화개체발생솔분별위45．1％（119/264아）화43．3％（78/180인）。남성조좌우상관계수위0．635，녀성조위0．574。근중근이2-2-2형근관위주，재삼근형조발생솔위68．0％（17/25），량근형조위76．0％（19/25）；1-1-1형근관상견우삼근형적원협근、원설근，발생솔균위100．0％（25/25）。량근형하합제일항마아적원중근비교상견적위2-2-2형화2-2-1형，발생솔의차시32．0％（8/25）、28．0％（7/25）。원협여원설근관구적간거차이유통계학의의（t＝8．569，P＜0．001）。결론：CBCT성상가이반영하합제일항마아사근관적해부형태，위하합제일항마아적근관치료제공료준학적영상학삼고。
To detect the prevalence of four root canals in permanent mandibular first molars and investigate the pulp floor and root canal system in mandibular first molars with four root canals by using cone -beam computed tomography (CBCT).Methods:A total of 180 Chinese patients′CBCT images were examined.The four root canals′incidences and bilateral concurrence rates were determined for the permanent mandibular first molars .The mandibular first molars with four root canals according to the difference of root number are divided into two groups : group A was three-rooted and group B was two-rooted,each group had 25 randomly selected samples .The images of two groups were analyzed by Kodak Dental 6.12.10, the root canal morphology was analyzed and the pulp chamber′s cross-sectional morphology was observed .Re-sults:The prevalence of four root canals in the mandibular first molars was 43.3% (78/180) calculated by individuals , and 45.1%(119/264) calculated by teeth.The correlation coefficient was 0.635 in the male group and was 0.574 in the femal group.The mesial root predominately contained a type 2-2-2 root canal, with a frequency of 68.0%(17/25)in the three-rooted molar group and 76.0%(19/25) in the two-rooted molar group.Type 1-1-1 canals were seen more frequently in the DL and DB roots of the three-rooted first molars, and the incidences were all 100.0%(25/25).The mean interorifice distances from DL canal to DB which was statistical significance were (3.81 ±0.55) and (2.03 ±0.88) mm, respectively (t=8.569,P<0.001).Conclusion: CBCT has high accuracy for observing the anatomy of the root canal and can be used to study the morphology of the mandibular first molars as important tools and provide a favorable reference for the clini -cal work.
