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中华口腔医学研究杂志(电子版)

中华口腔医学研究杂志(电子版) ›› 2023, Vol. 17 ›› Issue (03) : 197 -202. doi: 10.3877/cma.j.issn.1674-1366.2023.03.007

论著

可摘局部义齿卡环固位力测量系统的研制及其初步效果评价
王冬怡1, 戴沄1, 尹欣萍2, 孟佳丽3, 吴国锋4,†()   
  1. 1. 南京大学医学院附属口腔医院，南京市口腔医院修复科，南京　210008
    2. 南方医科大学第五附属医院口腔科，广州　510920
    3. 南京大学医学院附属口腔医院，南京市口腔医院数字化工程中心，南京　210008
    4. 南京大学医学院附属口腔医院，南京市口腔医院修复科，南京　210008；南京大学医学院附属口腔医院，南京市口腔医院数字化工程中心，南京　210008
  • 收稿日期:2022-10-20 出版日期:2023-02-21
  • 通信作者: 吴国锋

Development of a retention force measuring system for removable partial denture clasps and preliminary evaluation of its effects

Dongyi Wang1, Yun Dai1, Xinping Yin2, Jiali Meng3, Guofeng Wu4,†()   

  1. 1. Department of Prosthodontics, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, China
    2. Department of Stomatology, the Fifth Affiliated Hospital of Southern Medical University, Guangzhou 510920, China
    3. Stomatological Digital Engineering Center, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, China
    4. Department of Prosthodontics, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, China; Stomatological Digital Engineering Center, Nanjing Stomatological Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing 210008, China
  • Received:2022-10-20 Published:2023-02-21
  • Corresponding author: Guofeng Wu
  • Supported by:
    Open Project of Research Center of Engineering and Technology for Computerized Dentistry Ministry of Health(PKUSS20200501); "3456" Cultivation Program For Junior Talents of Nanjing Stomatological School, Medical School of Nanjing University(0222C117)
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王冬怡, 戴沄, 尹欣萍, 孟佳丽, 吴国锋. 可摘局部义齿卡环固位力测量系统的研制及其初步效果评价[J]. 中华口腔医学研究杂志(电子版), 2023, 17(03): 197-202.

Dongyi Wang, Yun Dai, Xinping Yin, Jiali Meng, Guofeng Wu. Development of a retention force measuring system for removable partial denture clasps and preliminary evaluation of its effects[J]. Chinese Journal of Stomatological Research(Electronic Edition), 2023, 17(03): 197-202.

目的

探讨可摘局部义齿卡环固位力测量系统的研制方法，并对其性能进行初步评价。

方法

设计研制可摘局部义齿卡环固位力测量系统，系统由卡环固位力测量仪、钳式测力计及测试系统软件3部分组成，主要设计指标为力学量程0 ~ 50 N、可连续测量固位力变化（每秒采集1 000个有效数据）。利用砝码对测量系统的测量精度进行验证。通过增材制造方式制作纯钛、钴铬合金卡环试件各12个，将每种材料卡环随机数字表法分为2组，每组6个。其中，使用电子万能材料试验机测量纯钛卡环和钴铬卡环分别为对照组1和2，每组6个，可摘局部义齿固位力测量系统测量纯钛卡环和钴铬卡环分别为实验组1和2，每组6个。比较2种测量方式测得的卡环初始固位力大小。使用单因素方差分析法比较系统精密度，对不同测量方式测得的义齿卡环试件初始固位力进行独立样本t检验。

结果

可摘局部义齿固位力测量系统精度符合设计要求。电子万能材料试验机测得对照组1（13.96 ± 1.51） N，对照组2（18.93 ± 1.42） N；可摘局部义齿固位力测量系统测得实验组1（10.35 ± 0.75） N，实验组2（15.34 ± 0.68） N。由相同材料及制作方式制成的卡环，经不同测量方式测得的初始固位力之间差异有统计学意义（t纯钛 = -11.740，P纯钛<0.001；t钴铬 = -12.492，P钴铬<0.001）。

结论

本实验研制的测量系统能更真实地体现卡环脱位过程中的固位力变化，更接近临床情况。

关键词: 可摘局部义齿, 义齿固位, 义齿卡环
Objective

This study was to develop a retention force measuring system and evaluate its performance.

Methods

A retention force measuring system was designed with three parts: retention force measuring instrument, clamp dynamometer, and retention force measuring software system. Main indicators included the measuring range from 0 to 50 N and the continuous measurement which collected 1 000 valid data per second. Then accuracy measurement experiment of the system was conducted using weights. Next, 12 CoCr and 12 CP-titanium clasps fabricated by additive manufacturing. The clasps made from the same material were labeled from 1 to 12, and 12 corresponding random numbers were generated and sorted in a descending order using Excel software. The first six clasps in the list were to form a group. The clasps of each material were divided into two groups (n = 6) , and their initial retention forces were measured using two methods. The obtained results were statistically analyzed using SPSS 18.0. One-Way ANOVA was used to compare the system precision, and independent sample t-test was performed to compare the initial retention force of denture clasps obtained by different measurement methods.

Results

The accuracy of the developed retention force measurement system complied with the design requirements. There was significant difference in the initial retention forces of clasps between the universal material testing machine [CP-titanium: (13.96 ± 1.51) N, CoCr: (18.93 ± 1.42) N] and the retention force measurement system [CP-titanium: (10.35 ± 0.75) N, CoCr: (15.34 ± 0.68) N] (tCPTi = -11.740, PCPTi<0.001; tCoCr = -12.492, PCoCr<0.001) .

Conclusion

The measurement system developed in this study revealed a more reliable retention force change in the process of clasp dislocation, which was closer to the clinical situation.

Key words: Denture, partial, removable, Dental prosthesis retention, Dental clasp
图1 可摘局部义齿卡环固位力测量系统的组成
图2 利用砝码验证测量系统精度实验
图3 金属基牙及三臂卡环支撑设计示意图　A：基牙支撑设计；B：三臂卡环支撑设计。
图4 可摘局部义齿固位力测量系统
图5 可摘局部义齿固位力测量系统口内操作
图6 可摘局部义齿卡环固位力口内测量结果曲线
图7 固位力测量方式示意图　A：电子万能材料试验机法；B：可摘局部义齿固位力测量系统法。箭头方向指示卡环脱位方向。
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