三种方法预备下颌第二恒磨牙C型根管预备效果的体外研究
发布时间：2018-11-15 14:18
【摘要】：目的通过CBCT对C1、C2型根管进行扫描,测量比较颊舌侧管壁最小厚度及分布,来指导临床应用,避免根管预备意外的发生;通过比较三种预备方法应用于24颗根管类型为C1、C2型的下颌第二恒磨牙的预备效果,探索一种能够相对有效的预备下颌第二恒磨牙C型根管的方法。方法收集根管类型为C1、C2型的下颌第二恒磨牙离体牙,各12颗。按不同分型将样本采用区组随机法分为Pro Taper镍钛旋转根管锉与用NSK回旋手机载02锥度不锈钢K锉联合预备组(机用联合组)、Pro Taper镍钛旋转根管锉与手用不锈钢K锉联合预备组(手用联合组)、Pro Taper镍钛旋转根管锉预备组(Pro Taper组)。每组每种类型各4颗。在根管预备前进行CBCT扫描和三维重建,测量C型根管距根尖2mm、5mm、8mm处影像颊舌侧根管壁的最小厚度,进行方差分析;记录C型根管距根尖2mm、5mm、8mm处影像颊舌侧根管壁的最小厚度的位置,进行卡方检验。根管预备后再进行CBCT扫描和三维重建,将预备前后同一截面影像重叠,评价各组器械根管预备后根管未预备面积百分比。采用SPSS20.0软件包进行数据统计及方差分析。结果1.24颗下颌第二恒磨牙舌侧根管壁最小厚度均小于颊侧根管壁最小厚度(P0.05);根冠部及根中部的颊舌侧根管壁最小厚度在根面沟中央区多见,根尖部则在近远中区多见。2.3种方法预备下颌第二恒磨牙的C1、C2型根管均有未预备区域。Pro Taper镍钛旋转根管锉与用NSK回旋手机载02锥度不锈钢K锉联合预备组分别在根冠部[未预备面积百分比为(6.60±4.23)%]及根中部[未预备面积百分比为(13.87±2.61)%]未预备面积较小;Pro Taper镍钛旋转根管锉与手用不锈钢K锉联合预备组分别在根中部[未预备面积百分比为(13.91±1.92)%]及根尖部[未预备面积百分比为(13.43±2.06)%]未预备面积较小。结论1.下颌第二恒磨牙C1、C2型根管的舌侧根管壁较薄,是根管预备过程中侧穿危险区。2.对于下颌第二恒磨牙的C1、C2型根管的机械预备方式宜采用Pro Taper镍钛旋转根管锉预备主根管,使用NSK回旋手机载02锥度不锈钢K锉水平运动方向的预备方式预备峡区的根冠部,手用不锈钢K锉沿根管方向提拉式预备峡区的根中部及根尖部。
[Abstract]:Objective to detect and compare the minimum thickness and distribution of C _ 1C _ 2 root canal by CBCT in order to guide clinical application and avoid accidental root canal preparation. By comparing the effects of three preparation methods applied to 24 mandibular second permanent molars with C1C _ 2 root canal type, a relatively effective method for the preparation of C type root canal of mandibular second permanent molar was explored. Methods the isolated mandibular second molars with C _ 1 C _ 2 type were collected, each with 12 teeth. According to different typing, the samples were randomly divided into two groups: Pro Taper nickel titanium rotary root canal file and NSK mobile phone carrying 02 taper stainless steel K file (machine combined group). Pro Taper nickel titanium rotary root canal file combined with hand stainless steel K file preparation group (hand combined group), Pro Taper nickel titanium rotary root canal file preparation group (Pro Taper group). Each group had 4 pieces for each type. Before root canal preparation, CBCT scanning and 3D reconstruction were performed, and the minimum thickness of the image of the lateral root wall of buccal and lingual root canal was measured at the distance of 2 mm to 5 mm or 8 mm from the root tip of type C root canal, and the variance analysis was carried out. The location of the minimum thickness of the lateral buccal and lingual root canal wall was recorded at the distance of 2 mm to 5 mm and 8 mm from the root tip of type C root canal, and chi-square test was performed. After root canal preparation, CBCT scanning and 3D reconstruction were performed, and the image of the same section before and after preparation was overlapped to evaluate the percentage of unprepared root canal area after root canal preparation in each group. Data statistics and ANOVA were carried out by SPSS20.0 software package. Results 1.The minimum thickness of lingual lateral canal wall of 24 mandibular second permanent molars was smaller than that of buccal lateral root canal wall (P0.05). The minimum thickness of the lateral buccal and lingual canals in the crown and the middle of the root was found in the central region of the facial sulcus, and in the proximal and distal region of the root tip. 2.3 methods were used to prepare the C _ 1 of the mandibular second permanent molar. Type C2 root canal all had unprepared area. Pro Taper nickel titanium rotary root canal file and combined preparation group with 02 taper stainless steel K file carried by NSK gyrotron cell phone [percentage of unprepared area was (6.60 卤4.23)%] and root in root preparation group, respectively. The percentage of unprepared area was (13.87 卤2.61)%. Pro Taper Ni-Ti rotary root canal file combined with hand stainless steel K file in the middle of root [percentage of unprepared area was (13.91 卤1.92)%] and apical part [percentage of unprepared area was (13.43 卤2.06)%] The unprepared area is small. Conclusion 1. The lateral lingual canals of the second mandibular permanent molar C _ 1 and C _ 2 are relatively thin, which is the dangerous area of lateral penetration during the preparation of root canals. 2. For the second mandibular permanent molar C _ 1C _ 2 root canal preparation, Pro Taper Ni-Ti rotary root canal file should be used to prepare the main root canal. The root crown of the isthmus region should be prepared by using the NSK rotary mobile phone with 02 taper stainless steel K file in horizontal motion direction. Hand stainless steel K file along the root canal along the root preparation isthmus center and root tip.
【学位授予单位】：山西医科大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R781.05
本文编号：2333542
[Abstract]:Objective to detect and compare the minimum thickness and distribution of C _ 1C _ 2 root canal by CBCT in order to guide clinical application and avoid accidental root canal preparation. By comparing the effects of three preparation methods applied to 24 mandibular second permanent molars with C1C _ 2 root canal type, a relatively effective method for the preparation of C type root canal of mandibular second permanent molar was explored. Methods the isolated mandibular second molars with C _ 1 C _ 2 type were collected, each with 12 teeth. According to different typing, the samples were randomly divided into two groups: Pro Taper nickel titanium rotary root canal file and NSK mobile phone carrying 02 taper stainless steel K file (machine combined group). Pro Taper nickel titanium rotary root canal file combined with hand stainless steel K file preparation group (hand combined group), Pro Taper nickel titanium rotary root canal file preparation group (Pro Taper group). Each group had 4 pieces for each type. Before root canal preparation, CBCT scanning and 3D reconstruction were performed, and the minimum thickness of the image of the lateral root wall of buccal and lingual root canal was measured at the distance of 2 mm to 5 mm or 8 mm from the root tip of type C root canal, and the variance analysis was carried out. The location of the minimum thickness of the lateral buccal and lingual root canal wall was recorded at the distance of 2 mm to 5 mm and 8 mm from the root tip of type C root canal, and chi-square test was performed. After root canal preparation, CBCT scanning and 3D reconstruction were performed, and the image of the same section before and after preparation was overlapped to evaluate the percentage of unprepared root canal area after root canal preparation in each group. Data statistics and ANOVA were carried out by SPSS20.0 software package. Results 1.The minimum thickness of lingual lateral canal wall of 24 mandibular second permanent molars was smaller than that of buccal lateral root canal wall (P0.05). The minimum thickness of the lateral buccal and lingual canals in the crown and the middle of the root was found in the central region of the facial sulcus, and in the proximal and distal region of the root tip. 2.3 methods were used to prepare the C _ 1 of the mandibular second permanent molar. Type C2 root canal all had unprepared area. Pro Taper nickel titanium rotary root canal file and combined preparation group with 02 taper stainless steel K file carried by NSK gyrotron cell phone [percentage of unprepared area was (6.60 卤4.23)%] and root in root preparation group, respectively. The percentage of unprepared area was (13.87 卤2.61)%. Pro Taper Ni-Ti rotary root canal file combined with hand stainless steel K file in the middle of root [percentage of unprepared area was (13.91 卤1.92)%] and apical part [percentage of unprepared area was (13.43 卤2.06)%] The unprepared area is small. Conclusion 1. The lateral lingual canals of the second mandibular permanent molar C _ 1 and C _ 2 are relatively thin, which is the dangerous area of lateral penetration during the preparation of root canals. 2. For the second mandibular permanent molar C _ 1C _ 2 root canal preparation, Pro Taper Ni-Ti rotary root canal file should be used to prepare the main root canal. The root crown of the isthmus region should be prepared by using the NSK rotary mobile phone with 02 taper stainless steel K file in horizontal motion direction. Hand stainless steel K file along the root canal along the root preparation isthmus center and root tip.
【学位授予单位】：山西医科大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：R781.05
【参考文献】
相关期刊论文 前10条
1 白银;武云霞;孙雯;;C型根管的根管预备研究进展[J];全科口腔医学电子杂志;2016年02期
2 顾永春;朱琦;张燕萍;周培刚;丁月峰;陈花花;周涛;;下颌第二恒磨牙C型根根管壁厚度的显微CT分析[J];实用口腔医学杂志;2014年02期
3 陈晨;;化学预备在根管治疗中的临床作用评价[J];医学综述;2014年06期
4 牟素丽;柳忠豪;;根管手术显微镜在疑难根管治疗中的应用研究[J];实用临床医药杂志;2012年13期
5 高飞;刘荣森;李颖超;石校伟;李雅彬;;锥形束CT在下颌第二磨牙C形根管治疗中的应用研究[J];人民军医;2010年05期
6 田慧颖;冯超;赵晶;刘丽;;应用显微超声技术进行根管再治疗的临床评价[J];华西口腔医学杂志;2008年05期
7 何飞;汪蕾;张萍;;超声在下颌磨牙C形根管预备中的应用[J];牙体牙髓牙周病学杂志;2008年06期
8 贾文祥;王彦超;;超声根管预备技术应用于弯曲、细小和堵塞根管的疗效分析[J];包头医学;2008年01期
9 庄最新;;下颌第二磨牙C形根管预备方法的临床探讨[J];广东牙病防治;2007年02期
10 范兵;边专;樊明文;;牙体牙髓临床治疗Ⅰ.C形根管的形态、识别和治疗[J];中华口腔医学杂志;2006年02期
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