三種方法預備下頜第二恒磨牙C型根管預備效果的體外研究
發(fā)布時間：2018-11-15 14:18
【摘要】：目的通過CBCT對C1、C2型根管進行掃描,測量比較頰舌側(cè)管壁最小厚度及分布,來指導臨床應用,避免根管預備意外的發(fā)生;通過比較三種預備方法應用于24顆根管類型為C1、C2型的下頜第二恒磨牙的預備效果,探索一種能夠相對有效的預備下頜第二恒磨牙C型根管的方法。方法收集根管類型為C1、C2型的下頜第二恒磨牙離體牙,各12顆。按不同分型將樣本采用區(qū)組隨機法分為Pro Taper鎳鈦旋轉(zhuǎn)根管銼與用NSK回旋手機載02錐度不銹鋼K銼聯(lián)合預備組(機用聯(lián)合組)、Pro Taper鎳鈦旋轉(zhuǎn)根管銼與手用不銹鋼K銼聯(lián)合預備組(手用聯(lián)合組)、Pro Taper鎳鈦旋轉(zhuǎn)根管銼預備組(Pro Taper組)。每組每種類型各4顆。在根管預備前進行CBCT掃描和三維重建,測量C型根管距根尖2mm、5mm、8mm處影像頰舌側(cè)根管壁的最小厚度,進行方差分析;記錄C型根管距根尖2mm、5mm、8mm處影像頰舌側(cè)根管壁的最小厚度的位置,進行卡方檢驗。根管預備后再進行CBCT掃描和三維重建,將預備前后同一截面影像重疊,評價各組器械根管預備后根管未預備面積百分比。采用SPSS20.0軟件包進行數(shù)據(jù)統(tǒng)計及方差分析。結(jié)果1.24顆下頜第二恒磨牙舌側(cè)根管壁最小厚度均小于頰側(cè)根管壁最小厚度(P0.05);根冠部及根中部的頰舌側(cè)根管壁最小厚度在根面溝中央?yún)^(qū)多見,根尖部則在近遠中區(qū)多見。2.3種方法預備下頜第二恒磨牙的C1、C2型根管均有未預備區(qū)域。Pro Taper鎳鈦旋轉(zhuǎn)根管銼與用NSK回旋手機載02錐度不銹鋼K銼聯(lián)合預備組分別在根冠部[未預備面積百分比為(6.60±4.23)%]及根中部[未預備面積百分比為(13.87±2.61)%]未預備面積較小;Pro Taper鎳鈦旋轉(zhuǎn)根管銼與手用不銹鋼K銼聯(lián)合預備組分別在根中部[未預備面積百分比為(13.91±1.92)%]及根尖部[未預備面積百分比為(13.43±2.06)%]未預備面積較小。結(jié)論1.下頜第二恒磨牙C1、C2型根管的舌側(cè)根管壁較薄,是根管預備過程中側(cè)穿危險區(qū)。2.對于下頜第二恒磨牙的C1、C2型根管的機械預備方式宜采用Pro Taper鎳鈦旋轉(zhuǎn)根管銼預備主根管,使用NSK回旋手機載02錐度不銹鋼K銼水平運動方向的預備方式預備峽區(qū)的根冠部,手用不銹鋼K銼沿根管方向提拉式預備峽區(qū)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 鹵4.23)%] and root in root preparation group, respectively. The percentage of unprepared area was (13.87 鹵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 鹵1.92)%] and apical part [percentage of unprepared area was (13.43 鹵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.
【學位授予單位】：山西醫(yī)科大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：R781.05
本文編號：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 鹵4.23)%] and root in root preparation group, respectively. The percentage of unprepared area was (13.87 鹵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 鹵1.92)%] and apical part [percentage of unprepared area was (13.43 鹵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.
【學位授予單位】：山西醫(yī)科大學
【學位級別】：碩士
【學位授予年份】：2017
【分類號】：R781.05
【參考文獻】
相關(guān)期刊論文 前10條
1 白銀;武云霞;孫雯;;C型根管的根管預備研究進展[J];全科口腔醫(yī)學電子雜志;2016年02期
2 顧永春;朱琦;張燕萍;周培剛;丁月峰;陳花花;周濤;;下頜第二恒磨牙C型根根管壁厚度的顯微CT分析[J];實用口腔醫(yī)學雜志;2014年02期
3 陳晨;;化學預備在根管治療中的臨床作用評價[J];醫(yī)學綜述;2014年06期
4 牟素麗;柳忠豪;;根管手術(shù)顯微鏡在疑難根管治療中的應用研究[J];實用臨床醫(yī)藥雜志;2012年13期
5 高飛;劉榮森;李穎超;石校偉;李雅彬;;錐形束CT在下頜第二磨牙C形根管治療中的應用研究[J];人民軍醫(yī);2010年05期
6 田慧穎;馮超;趙晶;劉麗;;應用顯微超聲技術(shù)進行根管再治療的臨床評價[J];華西口腔醫(yī)學雜志;2008年05期
7 何飛;汪蕾;張萍;;超聲在下頜磨牙C形根管預備中的應用[J];牙體牙髓牙周病學雜志;2008年06期
8 賈文祥;王彥超;;超聲根管預備技術(shù)應用于彎曲、細小和堵塞根管的療效分析[J];包頭醫(yī)學;2008年01期
9 莊最新;;下頜第二磨牙C形根管預備方法的臨床探討[J];廣東牙病防治;2007年02期
10 范兵;邊專;樊明文;;牙體牙髓臨床治療Ⅰ.C形根管的形態(tài)、識別和治療[J];中華口腔醫(yī)學雜志;2006年02期
，本文編號：2333542
本文鏈接：http://www.sikaile.net/yixuelunwen/kouq/2333542.html
最近更新
教材專著
