α和β相主牙胶尖热垂直加压根管充填的根尖微渗漏评价
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摘要
目的:采用葡萄糖定量微渗漏模型评价2种主牙胶尖进行热垂直加压根管充填技术封闭根尖的能力。方法:68颗单根管牙,随机分为3个实验组和2个对照组,采用冠向下根管预备技术,实验组分别为SystemBα相主牙胶尖组、SystemBβ相主牙胶尖组、冷牙胶侧压组(Cold Lateral Condensation,CLC),每组20颗牙。各组按照要求进行根管充填后连接于葡萄糖定量检测微渗漏模型,从冠方给予1.6kPa压力,检测第1d、2d、4d、7d、10d、15d、20d、30d从冠方向根方渗漏的葡萄糖含量。通过计算渗漏葡萄糖的浓度推算微渗漏的大小。结果:阴性对照组30d的渗漏值为0,阳性对照组30 d的最大渗漏值为177.5mmol/l。SystemBα组、SystemBβ组、冷侧压组三种充填材料在30d内均具有较好的根尖封闭能力。自第7d起,SystemBα组、SystemBβ组渗漏量显著少于冷侧压组(P<0.05),Systemα组与SystemBβ组之间无明显统计学差异(P>0.05)。结论:热垂直加压根管充填技术在根尖微渗漏方面优于冷侧压根管充填技术,在30d内,两种不同相主牙胶尖的根尖微渗漏量无统计学意义。
Objective: To evaluate the effect of warm vertical condensation on microleakage Methods: 68 extracted single-rooted teeth were randomly divided into 3 experimental groups(n=20) and 2 control groups(n=4). Group α was obturated with System B and the α phase gutta-percha. Group β was obturated with System B and the β phase gutta-percha.Group ClC(Cold Lateral Condensation) was obturated with cold lateral condensation. After that, the control groups remained apical 4 mm gutta-percha, corresponding to these teeth to do some processing. Using a newly designed leakage test device, coronal 1mol/L glucose solution was forced under a hydrostatic pressure of 1.6 KPa toward the apical part of the root. Leakage was measured by the concentration of leaked glucose in apical reservoir at 1, 2, 4, 7, 10, 15, 20, and 30 days.Result: All 3 filling materials showed good apical sealing ability during 30 days, and from the seven days on, α and β were statistically superior to CLC(P<0.05). There was no statistical difference among the α and β filling materials. Conclusion:Warm vertical condensation technique had less micro leakage than cold lateral condensation in 30 days.
Objective: To evaluate the effect of warm vertical condensation on microleakage Methods: 68 extracted single-rooted teeth were randomly divided into 3 experimental groups(n=20) and 2 control groups(n=4). Group α was obturated with System B and the α phase gutta-percha. Group β was obturated with System B and the β phase gutta-percha.Group ClC(Cold Lateral Condensation) was obturated with cold lateral condensation. After that, the control groups remained apical 4 mm gutta-percha, corresponding to these teeth to do some processing. Using a newly designed leakage test device, coronal 1mol/L glucose solution was forced under a hydrostatic pressure of 1.6 KPa toward the apical part of the root. Leakage was measured by the concentration of leaked glucose in apical reservoir at 1, 2, 4, 7, 10, 15, 20, and 30 days.Result: All 3 filling materials showed good apical sealing ability during 30 days, and from the seven days on, α and β were statistically superior to CLC(P<0.05). There was no statistical difference among the α and β filling materials. Conclusion:Warm vertical condensation technique had less micro leakage than cold lateral condensation in 30 days.
引文
[1]周秀娟,董艳梅,高学军.三种根管充填技术根管系统充盈致密度的实验观察[J].中华口腔医学杂志,2010,45(8):494-497
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[8]秦娜,刘丹,单兆臣.改进的连续波热牙胶根充法应用于老年人根管充填的临床评价[J].中华老年口腔医学杂志,2010,8(5):271-275
[9]Schilder H,Goodman A,Aldrich W.The thermomechanical properties of gutta-percha.Part V.Volume changes in bulk gutta-percha as a function of temperature and its relationship to molecular phase transformation[J].Oral Surg Oral Med Oral Pathol,1985,59(3):285-296
[10]张琛,黄巍,侯本祥.四种根管充填技术根充同质性和致密性评价[J].中华口腔医学杂志,2010,45(11):673-677
[11]Gen觭olu N,Oru觭olu H,Helvac1olu D.Apical Leakage of Different Gutta-Percha Techniques:Thermafil,Js Quick-Fill,Soft Core,Microseal,System B and Lateral Condensation with a Computerized Fluid Filtration Meter[J].Eur J Dent,2007,1(2):97-103
[12]Nelson EA.Increased density of gutta-percha using a controlled heat instrument with lateral condensation[J].J Endod,2000,26(12):748-750
[13]范兵.根管充填的长度和致密度[J].中华口腔医学杂志,2006,41(6):380-382
[14]Jurcak JJ.In vitro intracanal temperatures produced during warm lateral condensation of Gutta-percha[J].J Endod,1992,18(1):1-3
[15]张琛,黄巍,侯本祥.4种根管充填技术根尖微渗漏评价[J].北京口腔医学,2010,15(6):307-309
[16]Gurgel-Filho ED.Assessment of different gutta-percha brands during the filling of simulated lateral canals[J].Int Endod,2006,39(2):113-118
[2]Yilmaz Z,Deniz D,Ozcelik B,et al.Sealing efficiency of BeeFill 2in1 and System B/Obtura II versus single-cone and cold lateral compaction techniques[J].Oral,2009,108(6):51-55
[3]JL Gutmann,WP Saunders.An assessment of the plastic Thermafil obturation technique.Part 1 Radiographic evaluation of adaptation and placement[J].Int Endod,1993,26(3):173-178
[4]Wolcott J.Effect of two obturation techniques on the filling of lateral canals and the main canal[J].J Endod,1997,23(10):632-635
[5]徐琼,樊明文,范兵.葡萄糖定量分析根管微渗漏模型的建立[J].现代口腔医学杂志,2003,17(3):215-217
[6]Xu Q.A quantitative evaluation of sealing ability of 4obturation techniques by using a glucose leakage test[J].Oral Surg Oral Med Oral Pathol Oral Radiol Endod,2007,104(4):109-113
[7]王成龙,刘洪臣,储冰峰,等.ObturaⅡ牙胶充填根管的微渗漏研究[J].中华老年口腔医学杂志,2005,3(1):12-13
[8]秦娜,刘丹,单兆臣.改进的连续波热牙胶根充法应用于老年人根管充填的临床评价[J].中华老年口腔医学杂志,2010,8(5):271-275
[9]Schilder H,Goodman A,Aldrich W.The thermomechanical properties of gutta-percha.Part V.Volume changes in bulk gutta-percha as a function of temperature and its relationship to molecular phase transformation[J].Oral Surg Oral Med Oral Pathol,1985,59(3):285-296
[10]张琛,黄巍,侯本祥.四种根管充填技术根充同质性和致密性评价[J].中华口腔医学杂志,2010,45(11):673-677
[11]Gen觭olu N,Oru觭olu H,Helvac1olu D.Apical Leakage of Different Gutta-Percha Techniques:Thermafil,Js Quick-Fill,Soft Core,Microseal,System B and Lateral Condensation with a Computerized Fluid Filtration Meter[J].Eur J Dent,2007,1(2):97-103
[12]Nelson EA.Increased density of gutta-percha using a controlled heat instrument with lateral condensation[J].J Endod,2000,26(12):748-750
[13]范兵.根管充填的长度和致密度[J].中华口腔医学杂志,2006,41(6):380-382
[14]Jurcak JJ.In vitro intracanal temperatures produced during warm lateral condensation of Gutta-percha[J].J Endod,1992,18(1):1-3
[15]张琛,黄巍,侯本祥.4种根管充填技术根尖微渗漏评价[J].北京口腔医学,2010,15(6):307-309
[16]Gurgel-Filho ED.Assessment of different gutta-percha brands during the filling of simulated lateral canals[J].Int Endod,2006,39(2):113-118