三维打印光敏树脂牙列模型形态的长期稳定性研究  

Study on long-term morphological stability of three-dimensional-printed photosensitive resin dental models

作　　者：古瑞 王义鹏 叶吴霜 邵靖贻 薛超然[1] 白丁[1] Rui Gu;Yipeng Wang;Wushuang Ye;Jingyi Shao;Chaoran Xue;Ding Bai(Department of Orthodontics,West China Hospital of Stomatology,Sichuan University&State Key Laboratory of Oral Diseases&National Clinical Research Center for Oral Diseases,Chengdu 610041,China)

机构地区：[1]四川大学华西口腔医院正畸科、口腔疾病研究国家重点实验室、国家口腔疾病临床医学研究中心,成都610041

出　　处：《中华口腔医学杂志》2023年第3期271-276,共6页Chinese Journal of Stomatology

基　　金：中华口腔医学会口腔正畸专业委员会中青年临床科研项目(COS-C2021-02);四川省科技厅自然科学基金(22NSFSC2984);四川大学华西口腔医院探索与研发项目交叉学科创新项目(RD-03-202108);四川大学华西口腔医院新技术项目(LCYJ-2022-YY-3)。

摘　　要：目的探讨自然光照与严格避光条件下三维打印光敏树脂牙列模型(简称树脂牙列模型)形态的长期稳定性。方法利用标准牙列模型数据,使用桌面三维打印机制作80副(共160个)树脂牙列模型,随机抽样分为自然光照组(40副共80个)与严格避光组(40副共80个)进行密闭储存。储存1、3、5、7、14、21、28、40、60、90 d(每组每个时间点各4副)后使用光学模型扫描仪获取树脂牙列模型三维数据,测量树脂牙列模型三维数据与标准牙列模型数据的均方根误差(root-mean-square error,RMSE),即树脂牙列模型表面平均形变量。选择3项线距指标(尖牙间宽度、第一磨牙间宽度和牙弓长度),测量树脂牙列模型三维数据与标准牙列模型数据3项线距指标的差值,比较不同光照条件、不同储存时间组线距指标差值的差异。结果储存90 d内96.9%(155/160)的树脂牙列模型RMSE值未超过0.1 mm。对于相同储存时间点,两组树脂牙列模型RMSE值差异均无统计学意义(P>0.05)。75.0%(360/480)线距指标测量值与标准模型数据差值的绝对值在0.2 mm内,0.1%(3/480)超过0.5 mm,总体范围为0~0.6 mm。结论三维打印光敏树脂牙列模型在自然光照与严格避光条件下密封储存的长期形态稳定性良好。Objective To study the long-term morphological stability of three-dimensional(3D)-printed photosensitive resin dental models under natural light and dark conditions.Methods Eighty sets of resin dental models were made by the desktop 3D printer from one digital standard model set,and randomly divided into two groups,namely natural light group(40 sets)and dark group(40 sets).All resin models were stored in sealed bags,with 4 model sets from each group randomly collected after 1,3,5,7,14,21,28,40,60,or 90 days of storage and 3D scanned using an optical model scanner.The root-mean-square error(RMSE)was calculated to represent the mean deviation of the difference between the digital standard model and the scanned resin model.Meanwhile,three linear indexes(the width between the canines,the width between the first molars,and the arch length)of the resin dental model were measured and compared with the corresponding values of the standard model.RMSE and the linear measurements between the digital standard model and the scanned resin models were compared between the natural light group and the dark group and among models from different time points.Results Compared with the digital standard model,the RMSE values of 96.9%(155/160)resin dental models were less than 0.1 mm within 90-day storage.At the same time point,there was no significant difference in the RMSE between the natural light group and the dark group(P>0.05).75.0%(360/480)of the absolute values of the linear differences(differences in inter-canine width,intra-molar width,and arch length between the digital standard model and the scanned resin model)were within 0.2 mm,and about 0.1%(3/480)of the linear differences were greater than 0.5 mm,and all of the linear differences were within 0.6 mm.Conclusions 3D-printed resin dental models can be stored stably under natural light and dark conditions for a long time.

关 键 词：牙模型 牙科材料 树脂类 合成 光敏树脂 三维打印 形态稳定性 

分 类 号：R783.1[医药卫生—口腔医学]