根管湿润度对根管封闭性的影响
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摘要
目的:探究根管内湿润程度对根管封闭性的影响。方法:将160个离体单根牙根管预备后按湿润度分为(含水量,V为4组:①0. 250～0. 299,②0. 300～0. 599,③0. 600～0. 899和④0. 900～1. 199。80个样本分4组(n=20)用于染料渗透实验,另80个分4组(n=20)用于细菌渗漏实验。分别用氧化锌糊剂和AH-Plus与热牙胶垂直加压术封闭各组根管(n=10)。体视显微镜测量离体牙染料渗透长度;观测离体牙于细菌渗漏模型中出现浑浊的天数。结果:在2种根管封闭剂的样本中,随着湿润度的增加染料渗入长度明显增加(P <0. 05),粪肠球菌渗漏到模型下室的天数逐渐缩短(P <0. 05)。结论:根管湿润度增加可降低根管充填的封闭性能。
Objective: To study the effect of different wetness degrees in the root canal on the canal sealing. Methods: 160 root canal prepared single rooted teeth were divided into 4 groups( n = 40) by the root canal wetness degree( water content,V) :(1)0. 250 ～0. 299,(2)0. 300 ～ 0. 599,(3)0. 600 ～ 0. 899 and(4)0. 900 ～ 1. 199 respectively. 80 teeth were divided into 4 groups( n = 20) for dye leakage test and another 80 for bacterial microleakage test. Zinc oxide paste( ZOP) and AH-Plus( AH-P) with vertical condensation of warm gutta-percha were respectively used to seal the canals in each group of the samples( n = 10). The length of in vitro tooth dye penetration was measured by stereomicroscope; the time( days) of turbidity in the bacterial leakage model observed and compared. Results: Of all the canals sealed by ZOP or AH-P with the increase of the wetness the dye infiltration length increased significantly( P <0. 05) and the days in which the faecal intestine ball infiltrated into the lower chamber of the model was gradually decreased( P <0. 05). Conclusion: The increase of root canal moisture may reduce the sealing of the root canal.
Objective: To study the effect of different wetness degrees in the root canal on the canal sealing. Methods: 160 root canal prepared single rooted teeth were divided into 4 groups( n = 40) by the root canal wetness degree( water content,V) :(1)0. 250 ～0. 299,(2)0. 300 ～ 0. 599,(3)0. 600 ～ 0. 899 and(4)0. 900 ～ 1. 199 respectively. 80 teeth were divided into 4 groups( n = 20) for dye leakage test and another 80 for bacterial microleakage test. Zinc oxide paste( ZOP) and AH-Plus( AH-P) with vertical condensation of warm gutta-percha were respectively used to seal the canals in each group of the samples( n = 10). The length of in vitro tooth dye penetration was measured by stereomicroscope; the time( days) of turbidity in the bacterial leakage model observed and compared. Results: Of all the canals sealed by ZOP or AH-P with the increase of the wetness the dye infiltration length increased significantly( P <0. 05) and the days in which the faecal intestine ball infiltrated into the lower chamber of the model was gradually decreased( P <0. 05). Conclusion: The increase of root canal moisture may reduce the sealing of the root canal.
引文
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[15]Marques-Ferreira M,Abrantes M,Ferreira HD,et al.Sealing efficacy of system B versus thermafil and guttacore obturation techniques evidenced by scintigraphic analysis[J].JClin Exp Dent,2017,9(1):e56-e60.
[2]Alves FR,Vieira MV,Moreno JO,et al.Removal of filling material in the apicalroot canal by three retreatment approaches[J].End Pract Tod,2012,6(4):257-262.
[3]Wang X,Chang J,Hu S.A study on the sealing ability and antibacterial activity of Ca3Si O5/Ca Cl2composite cement for dental applications[J].Dent Mater J,2012,31(4):617-622.
[4]Rajbhandari SM,Pradhan B.Evaluation of sealing ability of three root-end filling materials[J].Orthodon J Nep,2016,5(1):27-30.
[5]刘颖,苗苗,张昕,等.终末冲洗方案对根管封闭剂与根管壁牙本质粘接强度的影响[J].实用口腔医学杂志,2016,32(1):72-76.
[6]Mokhtari F,Fard AS,Tabrizizadeh M,et al.The effect of contact with moisture on the voids in the sealer during canal obturation with lateral condensation method:An In-vitro Study[J].J Int Oral Health,2016,8(1):17-20.
[7]Gibby SG,Wong Y,Kulild JC,et al.Novel methodology to evaluate the effect of residual moisture on epoxy resin sealer/dentine interface:A pilot study[J].Int Endod J,2011,44(3):236-244.
[8]Leal FM,Camargo CHR,Valera MC,et al.Coronal bacterial leakage in root canals filled with single cone technique and different endodontic sealers[J].Braz Dent Sci,2014,17(2):57-62.
[9]G9rduysus M,G9rduysus M,Kü9ükkaya S.Apical microleakage of a silicone based root canal sealer:An electrochemical study[J].Int End J,2013,46(1-75):37.
[10]Silvestrin T,Torabinejad M,Handysides R,et al.Effect of apex size on the leakage of gutta-percha and sealer-filled root canals[J].Quintessence Int,2016,47(5):373-378.
[11]Hosoya N,Nomura M,Yoshikubo A,et al.Effect of canal drying methods on the apical seal[J].J Endod,2000,26(5):292-294.
[12]Pawar SS,Pujar MA,Makandar SD.Evaluation of the apical sealing ability of bioceramic sealer,AH plus&epiphany:An in vitro study[J].J Conserv Dent,2014,17(6):579-582.
[13]Viapiana R,Moinzadeh AT,Camilleri L,et al.Porosity and sealing ability of root fillings with gutta-percha and BioRoot RCS or AH Plus sealers.Evaluation by three ex vivo methods[J].Int Endod J,2016,49(8):774-782.
[14]Zhang C,Du J,Peng Z.Correlation between enterococcus faecalis and persistent intraradicular infection compared with primary intraradicular infection:A systematic review[J].JEndod,2015,41(8):1207-1213.
[15]Marques-Ferreira M,Abrantes M,Ferreira HD,et al.Sealing efficacy of system B versus thermafil and guttacore obturation techniques evidenced by scintigraphic analysis[J].JClin Exp Dent,2017,9(1):e56-e60.