热牙胶充填系统携热头工作状态下的实际温度  

Real temperature of the continuous-wave pluggers

作　　者：渠薇 白伟[2] 梁宇红[1,3] 高学军[1] 

机构地区：[1]北京大学口腔医学院.口腔医院牙体牙髓科,北京100081 [2]北京大学口腔医学院.口腔医院口腔材料研究室,北京100081 [3]北京大学国际医院口腔医学科,北京102206

出　　处：《北京大学学报（医学版）》2015年第5期834-837,共4页Journal of Peking University:Health Sciences

摘　　要：目的：测量热牙胶充填系统携热头工作状态下的实际温度,为临床研究热损伤、观察温度升高对充填材料影响提供理论依据。方法：使用双通道K型电偶温度计测量3种热牙胶充填系统的不同大小携热头和携热头不同部位（工作端尖端和距尖端2 mm、5 mm、10 mm处）的实际温度（设置温度200℃）,重复测量5次,比较不同充填系统、不同携热头大小、不同测量位点的实际工作温度和设置温度的差异,并用单因素方差分析法分析各因素的影响。结果：Bee Fill 40/0.03携热头尖端工作温度最高（198.7±7.7）℃,与设定温度200℃差异无统计学意义（P〉0.05）,其余携热头工作温度均低于设定温度200℃,差异有统计学意义（P〈0.05）,Bee Fill 60/0.06携热头距尖端10 mm处温度最低（69.9±4.0）℃。所有携热头尖端（0 mm）及尖端2 mm处温度较高（112.1∽198.7℃,中位数140.8℃）。结论：大部分热牙胶充填系统的携热头实际工作温度低于设定温度200℃。Objective： To measure the real temperatures on the pluggers of three continuous-wave devices,and to provide theoretical reference to evaluate thermal damage and heat＇s influence on the filling materials. Methods： The dual channel K type thermocouple was contacted to various sizes＇ pluggers in three different continuous-wave devices（ Bee Fill,Elements,BL）,and the highest temperatures at different points（ tip,and 2 mm,5 mm,10 mm from the tip） of the pluggers（ preset temperature was 200℃） were recorded. The measurements were performed 5 times. T-test was used to compare the real temperatures at the tips with that set on the display and one-way ANOVA was used to compare the temperatures of the pluggers in different devices,sizes and points. Results： The highest temperature was at the tip of Bee Fill 40 /0. 03 plugger（ 198. 7 ± 7. 7） ℃,but there was on statistical differences between that and the preset temperature 200 ℃. The temperatures of the remaining pluggers were obviously lower than200 ℃（ P〈0. 05）. The lowest temperature of the pluggers was detected at 10 mm from the tip of Bee Fill60 /0. 06 plugger（ 69. 9 ± 4. 0） ℃. The highest temperature of each plugger was detected at the tip or 2mm from the tip（ 112. 1 to 198. 7 ℃,and the median was 140. 8 ℃）. Conclusion： The real temperature of most continuous-wave pluggers included in this study is below the set temperature 200 ℃.

关 键 词：温度 根管充填材料 携热头 

分 类 号：R783.1[医药卫生—口腔医学]