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北京大学学报（医学版） ›› 2022, Vol. 54 ›› Issue (1): 140-145. doi: 10.19723/j.issn.1671-167X.2022.01.022

• 论著 • 上一篇    下一篇

不同材料及厚度椅旁CAD/CAM瓷贴面的边缘特征

李怡1,王丽瑜2,刘晓强1,△(),周倜3,吕季喆1,谭建国1   

  1. 1.北京大学口腔医学院·口腔医院修复科,国家口腔医学中心,国家口腔疾病临床医学研究中心,口腔数字化医疗技术和材料国家工程实验室,北京 100081
    2.南京医科大学口腔医学院,南京 210029
    3.烟台市口腔医院福山分院修复科,烟台 264001
  • 收稿日期:2021-10-08 出版日期:2022-02-18 发布日期:2022-02-21
  • 通讯作者: 刘晓强 E-mail:liuxiaoqiang@bjmu.edu.cn
  • 基金资助:
    国家临床重点专科建设项目(PKUSSNMP-201901);北京大学口腔医院临床新技术新疗法项目(PKUSSNCT-21B01)

Marginal features of CAD/CAM laminate veneers with different materials and thicknesses

LI Yi1,WONG Lai U2,LIU Xiao-qiang1,△(),ZHOU Ti3,LYU Ji-zhe1,TAN Jian-guo1   

  1. 1. Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Center of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology, Beijing 100081, China
    2. Stomatological College of Nanjing Medical University, Nanjing 210029, China
    3. Department of Prosthodontics, Fushan Clinical Division, Yantai Stomatological Hospital, Yantai 264001, Shandong, China
  • Received:2021-10-08 Online:2022-02-18 Published:2022-02-21
  • Contact: Xiao-qiang LIU E-mail:liuxiaoqiang@bjmu.edu.cn
  • Supported by:
    National Clinical Key Discipline Construction Project(PKUSSNMP-201901);Program for New Clinical Techniques and Therapies of Peking University School and Hospital of Stomatology(PKUSSNCT-21B01)

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摘要：

目的: 评价不同材料及厚度椅旁计算机辅助设计和计算机辅助制作(computer-aided design and computer-aided manufacturing,CAD/CAM)瓷贴面的边缘粗糙度和边缘密合度,旨在为瓷贴面的临床应用提供参考。方法: 在树脂人工牙上进行对接型瓷贴面牙体预备,利用扫描仪扫描预备体,利用椅旁切削设备CAD/CAM瓷贴面。根据陶瓷材料类型(玻璃基陶瓷和树脂基陶瓷)及贴面厚度(0.3 mm和0.5 mm)将贴面分为4组(n=9),共36个。利用体式显微镜拍摄瓷贴面边缘形貌的数码照片,在软件内测量边缘粗糙度;利用间隙检查剂和数字化扫描与测量方法评价瓷贴面的边缘密合度;同时利用万能力学试验机测试玻璃基陶瓷和树脂基陶瓷条形试件(n=20)的力学性能。结果: 厚度为0.3 mm和0.5 mm玻璃基陶瓷贴面的边缘粗糙度分别为(24.48±5.55) μm和(19.06±5.75) μm,差异有统计学意义(P<0.001);厚度为0.3 mm和0.5 mm树脂基陶瓷贴面的边缘粗糙度分别为(6.13±1.27) μm和(6.84±2.19) μm,差异无统计学意义(P>0.05);玻璃基陶瓷贴面的边缘粗糙度大于树脂基陶瓷,差异有统计学意义(P<0.001)。厚度为0.3 mm和0.5 mm玻璃基陶瓷贴面的边缘密合度分别为(66.30±26.71) μm和(85.48±30.44) μm,厚度为0.3 mm和0.5 mm树脂基陶瓷贴面的边缘密合度分别为(56.42±19.27) μm和(58.36±8.33) μm,4组间差异均无统计学意义(P>0.05)。玻璃基陶瓷的弯曲强度为(327.40±54.25) MPa,弯曲模量为(44.40±4.39) GPa,回弹模量为(1.24±0.37) MPa;树脂基陶瓷的弯曲强度为(173.71±16.61) MPa,弯曲模量为(11.88±0.51) GPa,回弹模量为(1.29±0.27) MPa;玻璃基陶瓷的弯曲强度和弯曲模量大于树脂基陶瓷,差异有统计学意义(P<0.001),但两种材料的回弹模量差异无统计学意义(P>0.05)。结论: 椅旁CAD/CAM玻璃基陶瓷贴面的边缘粗糙度大于树脂基陶瓷贴面,但二者的边缘密合度无显著差异。增加贴面厚度可降低玻璃基陶瓷贴面的边缘粗糙度,但对树脂基陶瓷贴面的边缘粗糙度无影响。

关键词: 牙贴面, 陶瓷, 计算机辅助设计, 牙科边缘适合性, 材料试验

Abstract:

Objective: To analyze the marginal roughness and marginal fitness of chairside computer-aided design and computer-aided manufacturing (CAD/CAM) laminate veneers with different materials and thicknesses, and to provide a reference for the clinical application of laminate veneers. Methods: The butt-to-butt type laminate veneers were prepared on resin typodonts, the preparations were scanned, and the laminate veneers were manufactured by chairside CAD/CAM equipment. The laminate veneers were divided into four groups (n=9) according to the materials (glass-matrix ceramics and resin-matrix ceramics) and thickness (0.3 mm and 0.5 mm) of the veneers, with a total of 36. The marginal topo-graphies of each laminate veneer were digitally recorded by stereomicroscope, and the marginal rough-nesses of the laminate veneers were determined by ImageJ software. The marginal fitness of the laminate veneers was measured by a fit checker and digital scanning and measuring method. At the same time, the mechanical properties of glass-matrix ceramic and resin-matrix ceramic bars (n=20) were tested by a universal testing device. Results: The marginal roughness of 0.3 mm and 0.5 mm glass-matrix ceramic laminate veneers was (24.48±5.55) μm and (19.06±5.75) μm, respectively, with a statistically significant difference (P<0.001). The marginal roughness of 0.3 mm and 0.5 mm resin-matrix ceramic laminate veneers was (6.13±1.27) μm and (6.84±2.19) μm, respectively, without a statistically significant difference (P>0.05). The marginal roughness of the glass-matrix ceramic laminate veneers was higher than that of the resin-matrix ceramic laminate veneers with a statistically significant difference (P<0.001). The marginal fitness of 0.3 mm and 0.5 mm glass-matrix ceramic laminate veneers were (66.30±26.71) μm and (85.48±30.44) μm, respectively. The marginal fitness of 0.3 mm and 0.5 mm resin-matrix ceramic laminate veneers were (56.42±19.27) μm and (58.36±8.33) μm, respectively. There was no statistically significant difference among the 4 groups (P>0.05). For glass-matrix ceramics, the flexural strength was (327.40±54.25) MPa, the flexural modulus was (44.40±4.39) GPa, and the modulus of resilience was (1.24±0.37) MPa. For resin-matrix ceramics, the flexural strength was (173.71±16.61) MPa, the flexural modulus was (11.88±0.51) GPa, and the modulus of resilience was (1.29±0.27) MPa. The flexural strength and modulus of glass-matrix ceramics were significantly higher than those of resin-matrix ceramics (P<0.001), but there was no statistically significant difference in the modulus of resilience between the two materials (P>0.05). Conclusion: The marginal roughness of CAD/CAM glass-matrix ceramic laminate veneers is greater than that of resin-matrix ceramic laminate veneers, but there was no statistically significant difference in marginal fitness among them. Increasing the thickness can reduce the marginal roughness of glass-matrix ceramic laminate veneers, but has no effect on the marginal roughness of resin-matrix ceramic laminate veneers.

Key words: Dental veneers, Ceramics, Computer-aided design, Dental marginal adaptation, Materials testing

中图分类号: 

  • R783.1

表1

贴面的分组信息"

Material Thickness/mm Color Composition
Glass-matrix ceramics 0.3 LT/A2 SiO2 58.5%-72.5%, Li2O 13%-15%, K2O 3%-5%, other oxides 7.5%-25%
Glass-matrix ceramics 0.5 LT/A2 SiO2 58.5%-72.5%, Li2O 13%-15%, K2O 3%-5%, other oxides 7.5%-25%
Resin-matrix ceramics 0.3 LT/A2 Resin polymer 13%-43%, inorganic filler 55%-85%, additives <1%, colorant <1%
Resin-matrix ceramics 0.5 LT/A2 Resin polymer 13%-43%, inorganic filler 55%-85%, additives <1%, Colorant <1%

图1

树脂人工牙模型"

图2

贴面边缘粗糙度测量方法"

图3

贴面边缘密合度的测量点"

图4

三点弯曲试验示意图"

图5

贴面的边缘形貌"

图6

贴面的边缘粗糙度"

图7

贴面的边缘密合度"

表2

陶瓷的力学性能"

Material Flexural strength/MPa Flexural modulus/GPa Modulus of resilience/MPa
Glass-matrix ceramics 327.40±54.25 44.40±4.39 1.24±0.37
Resin-matrix ceramics 173.71±16.61* 11.88±0.51* 1.29±0.27
P value <0.001 <0.001 0.632
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ISSN 1671-167X
CN 11-4691/R
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