上海口腔医学

上海口腔医学 ›› 2022, Vol. 31 ›› Issue (1): 29-31.doi: 10.19439/j.sjos.2022.01.006

• 论著 • 上一篇    下一篇

不同尺寸铸瓷连接体的抗折强度分析

楼丽君1, 于卫强2, 翁维民2   

  1. 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
  • 收稿日期:2021-09-20 修回日期:2021-10-25 出版日期:2022-02-25 发布日期:2022-03-10
  • 通讯作者: 翁维民,E-mail:wengweimin31@126.com
  • 作者简介:楼丽君（1986-）,女,本科,主治医师,E-mail:731537676@qq.com
  • 基金资助:
    上海市卫健委项目 (201540061)

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

LOU Li-jun1, YU Wei-qiang2, WENG Wei-min2   

  1. 1. Department of Stomatology, Hengdian Wenrong Hospital. Dongyang 322118, Zhejiang Province;
    2. 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
  • Received:2021-09-20 Revised:2021-10-25 Online:2022-02-25 Published:2022-03-10

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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。

关键词: 铸瓷, 连接体, 三点弯曲

Abstract: 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.

Key words: Cast porcelain, Connector, Three-point bending

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