水温变化对藻酸盐印模材料精度及凝固时间的影响  

The influence of water temperature variations on the accuracy and setting time of alginate impression materials

作　　者：周亿岸 肖松 王宇华[2] 翁维民[2] Zhou Yian;Xiao Song;Wang Yuhua;Weng Weimin(Department of Stomatology,School of Medicine,Jinggangshan University,Ji'an 343000;Department of Prosthodontics,Shanghai Ninth People's Hospital,Shanghai Jiao Tong University School of Medicine,College of Stomatology,Shanghai Jiao Tong University,National Center for Stomatology,National Clinical Research Center for Oral Diseases,Shanghai Key Laboratory of Stomatology,Shanghai 200011)

机构地区：[1]井冈山大学医学部口腔医学系,吉安343000 [2]上海交通大学医学院附属第九人民医院口腔修复科,上海交通大学口腔医学院,国家口腔疾病临床医学研究中心,上海市口腔医学重点实验室,上海市口腔医学研究所,上海200011

出　　处：《口腔材料器械杂志》2024年第1期20-23,共4页Chinese Journal of Dental Materials and Devices

基　　金：上海市自然科学基金面上项目(编号:20ZR1431900);上海第九人民医院院级教学项目(编号:JYJX03201904)。

摘　　要：目的探究水温变化对藻酸盐印模材料流动性、工作时间、凝固时间和形变量的影响。方法分别将液剂控制在4种不同水温(8℃、14℃、23℃和32℃)下用全自动印模调拌机调拌藻酸盐粉体,通过比较4组藻酸盐印模材料在玻璃板上的流动性,观测测量工作时间、凝固时间;利用模具套件制取印模,再观察印模形变量。采用SPSS 24.0软件包对数据进行统计学分析,比较各组之间的差异。结果4种不同温度液剂调制的藻酸盐印模材料的流动性从大到小依次为8℃组>14℃组>23℃组>32℃组,且不同组别间差异具有统计学意义(P<0.05)。工作时间及凝固时间从短到长依次为32℃组<23℃组<14℃组<8℃组,各组间差异具有统计学意义(P<0.05),32℃组的工作时间(29.3±1.0)s和凝固时间(41.0±1.4)s以及8℃组的凝固时间(133.2±3.8)s均不符合临床使用要求。各组形变量之间存在差异,但不具有统计学意义(P>0.05)。结论在一定范围内,水温变化和藻酸盐印模材料的流动性、工作时间及凝固时间呈负相关,临床使用时以14℃~25℃的水温较合适。Objective Explore the influence of water temperature variations on the flowability,working time,setting time,and deformation of alginate impression materials.Methods Four different water temperatures were used to mix alginate with a fullautomatic impression mixing machine,grouped according to different water temperatures(8℃,14℃,23℃and 32℃),and the work⁃ing time and setting time were observed and measured by comparing the flowability of alginate impression materials on the glass plate;a mold kit was used to prepare the impression and observe its deformation.The data was statisically analyze using the SPSS 24.0 soft⁃ware package and compare the differences between the groups.Results The flowability of the alginate impression materials prepared by the four different water temperature was in order of 8℃group>14℃group>23℃group>32℃group,and the difference between groups was statistically significant(P<0.05).The working time and the setting time in descending order was 32℃group<23℃group<14℃group<8℃group,and the difference between different groups was statistically significant(P<0.05).The working time of(29.3±1.0)s and setting time of(41.0±1.4)s in the 32℃group,as well as the setting time of(133.2±3.8)s in 8℃group,did not meet the requirements for clinical application.There was a differences in deformation between the groups,but it was not statistically significant(P>0.05).Conclusion Within a certain range,the water temperature has a negative correlation with the fluidity,working time and setting time of alginate impression materials.A water temperature of 14~25℃is suitable for clinical use.

关 键 词：藻酸盐印模材料 温度 流动性 工作时间 形变量 

分 类 号：R783.1[医药卫生—口腔医学]