不同尺寸铸瓷连接体的抗折强度分析  

Study on the bending strength of cast porcelain material of different linker sizes

作　　者：楼丽君 于卫强[2] 翁维民[2] LOU Li-jun;YU Wei-qiang;WENG Wei-min(Department of Stomatology,Hengdian Wenrong Hospital.Dongyang 322118,Zhejiang Province;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 of Oral Diseases,Shanghai Key Laboratory of Stomatology.Shanghai 200011,China)

机构地区：[1]浙江横店文荣医院口腔科,浙江东阳322118 [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,国家口腔医学中心,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200011

出　　处：《上海口腔医学》2022年第1期29-31,共3页Shanghai Journal of Stomatology

基　　金：上海市卫健委项目(201540061)。

摘　　要：目的:通过体外实验探讨不同连接体尺寸与铸瓷材料抗折强度的关系。方法:按照全瓷材料和模拟连接体面积不同分为5组,A组采用铸瓷材料模拟连接体,截面为2 mm×3 mm;B组采用铸瓷材料模拟连接体,截面为2 mm×4 mm;C组采用铸瓷材料模拟连接体,截面为3 mm×3 mm;D组采用铸瓷材料模拟连接体,截面为3 mm×4 mm;E组为采用氧化锆材料模拟连接体,截面为2 mm×3 mm。利用经典三点弯曲实验测试样品的断裂载荷,采用SPSS 18.0软件包进行统计学分析。结果:对于二硅酸锂铸瓷而言,随着截面积的不断增加,其断裂载荷也不断增加,但均低于截面为2 mm×3 mm的可切削氧化锆的断裂载荷,有统计学差异(P<0.05)。相对于长度,宽度增加更能提高铸瓷样品的断裂载荷。结论:铸瓷用于粘接单端桥时要尽量增加连接体面积,可通过增加连接体处的宽度予以实现。PURPOSE:To investigate the relationship between size of different connectors and bending strength of cast porcelain materials.METHODS:The samples were divided into 5 groups according to the area of all-porcelain materials and simulated connector.In group A,simulated connector with cast porcelain material with a cross-section of 2 mm×3 mm was selected;In group B,simulated connector with cast porcelain material with a cross-section of 2 mm×4 mm was selected;In group C,simulated connector with cast porcelain material with a cross-section of 3 mm×3 mm was selected;In group D,simulated connector with cast porcelain material with a cross-section of 3 mm×4 mm was selected;In group E,simulated connector with zirconium oxide material with a cross-section of 2 mm×3 mm was selected.The fracture load was tested using classical three-point bending experiment,statistical analysis was performed using SPSS 18.0 software package.RESULTS:For lithium disilicate cast porcelain,the fracture load increased with increasing cross section area,but both below the shear zirconia fracture load with a cross section of 2 mm×3 mm(P<0.05).The increase in width increased the fracture load of porcelain samples compared to the length.CONCLUSIONS:It is suitable to increase linker area when cast porcelain is applied to single-end bridge,which is especially achieved by increasing the width at the linker.

关 键 词：铸瓷 连接体 三点弯曲 

分 类 号：R783.1[医药卫生—口腔医学]