4种暂封材料体外微渗漏实验研究及临床观察

目的　了解临床上常用的4种暂封材料的密合性能,以及在牙髓病、根尖周病治疗中用于暂封的临床效果，为临床选择暂封材料提供参考依据。方法　实验对象采用随机数字表法分为4组，A组:Caviton暂封组、B组:Ceivitron暂封组、C组:氧化锌丁香油水门汀（ZOE）暂封组、D组:牙胶条暂封组；实验研究选取122颗完整前磨牙,常规根管治疗后分别按实验分组暂封，用2%亚甲基蓝染料进行渗透试验,观察染料渗透深度并进行分析；临床观察选择101例患者牙髓炎、根尖周炎患牙218 颗，按实验分组分别应用不同暂封材料封药，复诊观察临床效果。结果　离体牙实验中1、2周A组及B组较C组及D组好（P<0.05），D组效果最差(P<0.05)；在暂封4周后，B组暂封效果好于A组（P<0.05），均好于C组及D组（P<0.05）；在临床实验中，A组及B组优于C组（P<0.05），C组优于D组（P<0.05），D组暂封效果与洞型相关。结论　Ceivitron暂封膏及Caviton暂封膏是较为理想的临床暂封材料，值得临床推广。

Experimental study and clinical observation of clinical effects of four temporary restorative materials

Objective To evaluate sealability of four temporary restorative materials by experiment and clinical application.Methods The experimental groups include A：Caviton temporary restorative ointment（Caviton group）,B：Ceivitron temporary restorative ointment（Ceivitron group）、C：ZOE group and D：gutta group.A total of 122 premolar teeth were randomly divided into four experimental groups and one control group.After root canal being prepared and filled,cavities were filled with different temporary restorative materials respectively.A 2 % methylene blue solution was used to test the sealing capacity of the four different dental temporary restorative materials against microleakage.The penetrating depths of the dye were observed.218 teeth from 101 patients with pulpitis or periodontitis were treated by temporary restorative materials according to groups.Follow-up examinations were conducted 2 days and 2 weeks later.Results In experiments in vitro the sealability of group A and group B had significant difference comparing with group C and group D（P0.05） one week and two week after experiments.Group D had the worst sealability（P0.05）.4 weeks later,the sealability of group B was better than group A（P0.05）,and both were better than group C and group D（P0.05）.The sealabilty of group A and group B was better than group C,and group C was better than group D（P0.05） in cilinical observation.The sealability of group D was related to types of cavities.Conclusions Caviton temporary restorative ointment and Ceivitron temporary restorative ointment are ideal temporary restorative materials,and are worth clinical promotion.