口腔医学研究

口腔医学研究 ›› 2026, Vol. 42 ›› Issue (5): 386-390.DOI: 10.13701/j.cnki.kqyxyj.2026.05.005

• 口腔材料学研究 • 上一篇    下一篇

4种数字化义齿基托树脂材料弯曲强度比较研究

赵天然, 柳玉晓*   

  1. 解放军第960医院口腔科 山东 济南 250031
  • 收稿日期:2025-11-03 出版日期:2026-05-28 发布日期:2026-05-25
  • 通讯作者: *柳玉晓,E-mail: 894085709@qq.com
  • 作者简介:赵天然(1988~ ),女,山东德州人,本科,主治医师,主要从事数字化口腔修复技术研究。

Comparative Study on Flexural Strength of Four Different Digital Dental Base Materials

ZHAO Tianran, LIU Yuxiao*   

  1. Department of Stomatology, The 960th Hospital of PLA, Jinan 250031, China
  • Received:2025-11-03 Online:2026-05-28 Published:2026-05-25

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摘要： 目的:探讨4种数字化义齿基托树脂材料的弯曲强度,为其临床应用提供证据。方法:选取4种数字化义齿基托树脂材料,其中两种为切削材料:计算机辅助设计/计算机辅助制造(computer-aided design/computer-aided manufacture, CAD/CAM)聚甲基丙烯酸甲酯(polymethyl methacrylate,PMMA)和ADT树脂,两种为3D打印材料HGT树脂和HJT树脂,制作尺寸为80 mm×10 mm×4 mm的矩形试件各8个,使用万能材料试验机进行三点弯曲试验,记录断裂载荷、计算弯曲强度、电镜观察失效模式。使用SPSS 22.0软件对数据进行统计分析。结果:切削树脂(CAD/CAM PMMA和ADT树脂)断裂载荷、弯曲强度与3D打印树脂(HGT树脂和HJT树脂)比较均有统计学差异(P<0.05),CAD/CAM PMMA和ADT树脂之间断裂载荷和弯曲强度比较有统计学差异(P<0.05),HGT树脂和HJT树脂两项指标比较均无统计学差异(P>0.05),两者的弯曲强度均低于65 MPa。4种树脂的失效模式均为脆性断裂。结论:CAD/CAM PMMA和ADT树脂弯曲强度能满足全口义齿基托树脂要求,HGT树脂和HJT树脂弯曲强度低于全口义齿基托树脂要求。

关键词: 计算机辅助设计/计算机辅助制造聚甲基丙烯酸甲酯, ADT树脂, HGT树脂, HJT树脂, 弯曲强度, 失效模式

Abstract: Objective: To compare the flexural strength of four different digital dental base materials, and provide evidence for their clinical application. Methods: Four different digital dental base materials including two milling resin [computer-aided design/computer-aided manufacture (CAD/CAM) polymethyl methacrylate (PMMA) and ADT resin] and two 3D printing resin (HGT resin and HJT resin) were selected and fabricated samples with the size of 80 mm×10 mm×4 mm (n=8). A three-point bending test was carried out by using a Universal Testing Machine. The flexural strength were calculated, and the failure mode of the samples was observed by SEM. Results: Statistical difference was found between milling samples and 3D printing samples for fracture resistance and flexural strength (P<0.05). Statistical difference was also found between CAD/CAM PMMA and ADT resin (P<0.05) while not found between HGT resin and HJT resin (P>0.05) for flexural strength and fracture resistance. The flexural strengths of two 3D printing resins were lower than 65 Mpa. The failure modes of four resins were all brittle fracture. Conclusion: The flexural strength of CAD/CAM PMMA and ADT resin meet the requirements of digital complete denture base resin, while that of HGT and HJT resin is lower than the requirements.

Key words: CAD/CAM PMMA, ADT resin, HGT resin, HJT resin, flexural strength, failure mode