中国组织工程研究 ›› 2018, Vol. 22 ›› Issue (26): 4128-4132.doi: 10.3969/j.issn.2095-4344.0747

• 组织工程口腔材料 tissue-engineered oral materials • 上一篇    下一篇

三种椅旁CAD/CAM全瓷高嵌体的抗压强度

喻璐璐1,2,顾卫平1,2   

  1. 1南京医科大学口腔疾病研究江苏省重点实验室,江苏省南京市 210029;2南京医科大学附属口腔医院综合科,江苏省南京市 210029
  • 收稿日期:2017-12-16 出版日期:2018-09-18 发布日期:2018-09-18
  • 通讯作者: 顾卫平,硕士生导师,主任医师,南京医科大学附属口腔医院综合科,江苏省南京市 210029
  • 作者简介:喻璐璐,女,1993年生,浙江省杭州市人,汉族,南京医科大学在读硕士,主要从事口腔修复研究。
  • 基金资助:

    江苏高校优势学科建设工程资助项目(2014-37)

Compressive strength of three all-ceramic chairside CAD/CAM onlays

Yu Lu-lu1, 2, Gu Wei-ping1, 2   

  1. 1Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China; 2Department of Polyclinics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
  • Received:2017-12-16 Online:2018-09-18 Published:2018-09-18
  • Contact: Gu Wei-ping, Master’s supervisor, Chief physician, Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China; Department of Polyclinics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
  • About author:Yu Lu-lu, Master candidate, Jiangsu Key Laboratory of Oral Diseases, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China; Department of Polyclinics, Affiliated Hospital of Stomatology, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
  • Supported by:

    the Advantage Discipline Construction Project in Jiangsu Universities, No. 2014-37

摘要:

文章快速阅读:

 

文题释义:
高嵌体:是利用黏结技术部分嵌入牙冠内、部分高于牙面的修复体,当患牙有较大范围缺损,需恢复外形及咬合接触同时有完整颊舌壁可保留时,适宜行高嵌体修复,其备牙量少,保留牙体组织较多,牙壁的受力将由嵌体时的拉应力改为压应力,可降低牙折风险。
高嵌体材料:CEREC Blocs属于天然长石质瓷,是一种非晶玻璃,其主要成分为SiO2、Al2O3、Na2O和K2O。IPS e.max CAD是新型的二硅酸锂增强型玻璃陶瓷材料,其中二硅酸锂晶体的加入有效阻止了微裂纹的扩展,经热处理后可提高陶瓷的强度,其弯曲强度可达360-400 MPa。Lava Ultimate是有机树脂与无机填料混合而成的复合材料,在二甲基丙烯酸酯树脂的网状结构中,添加了80%的纳米型胶体硅与ZrO2颗粒的混合物,降低了材料的脆性同时增强其韧性。
CAD/CAM:是计算机辅助设计与制作(computer aided design/computer aided manufacture)的简称,口腔修复学领域的CAD/CAM技术是指将数字、光电子技术、计算机信息处理技术和自动控制机械加工技术相组合用于修复体制作的一种工艺,通常由数据采集(数字化模型)、CAD、CAM三部分组成。
 
 
背景:椅旁CAD/CAM全瓷高嵌体修复在临床上的应用越来越广泛。不同椅旁CAD/CAM全瓷材料具有不同的理化性能,为临床选择造成一定难度,目前国内外对于椅旁CAD/CAM全瓷高嵌体修复的抗压强度研究较少。
目的:研究不同椅旁CAD/CAM全瓷高嵌体修复的抗压强度,观察其折裂模式。
方法:制备30个人离体牙高嵌体试件,分别以CEREC Blocs、IPS e.max CAD、Lava Ultimate陶瓷材料为高嵌体,每种材料10个试件,每种材料又分黏结组与非黏结组,黏结组试件用双固化树脂粘接剂将高嵌体与离体牙进行黏结,非黏结组将高嵌体试戴调改后直接密合于离体牙上。检测各组试件垂直加载下的抗压强度值,同时观察其折裂模式。

结果与结论:①在6组中,抗压强度最大的是IPS e.max CAD黏结组,抗压强度值为(313.22±56.00) MPa;抗压强度最小的是CEREC Blocs非黏结组,抗压强度值为(15.85±5.20) MPa。IPS e.max CAD黏结组抗压强度大于其余5组(P < 0.05);Lava Ultimate黏结组与CEREC Blocs黏结组的抗压强度无差异;CEREC Blocs、IPS e.max CAD、Lava Ultimate三种材料黏结组的抗压强度远大于对应的非黏结组(P < 0.05);②试件折裂模式为:非黏结组仅有瓷块折裂;粘结组86.6%的试件瓷块折裂同时伴有牙齿折裂。黏结组的牙齿折裂率大于非黏结组(P < 0.05);3种材料黏结组的折裂模式无差异(P > 0.05);③结果表明在3种椅旁CAD/CAM全瓷材料中,IPS e.max CAD陶瓷材料高嵌体黏结后的抗压强度最大。

ORCID: 0000-0001-9079-5844(喻璐璐)

 

关键词: 椅旁CAD/CAM, 全瓷材料, 纳米复合陶瓷, 高嵌体, 抗压强度, 折裂模式, 口腔生物材料, 生物材料

Abstract:

BACKGROUND: The use of chairside computer aided design/computer aided manufacture (CAD/CAM) system is a convenient way to fabricate porcelain onlays that have been widely used in clinical practice. Different chairside CAD/CAM all-ceramic materials have different physical and chemical properties, which make a certain difficulty in clinical selection. There are few studies on compressive strength of chairside CAD/CAM porcelain onlays at home and abroad.

OBJECTIVE: To investigate the fracture strength of onlay restorations with different chairside CAD/CAM all-ceramic materials.

METHODS: Thirty onlay specimens of isolated teeth were prepared in the study. These specimens were randomly divided into three groups: CEREC Blocs group, IPS e.max CAD group and Lava Ultimate group. In each group, 10 specimens were randomized into two subgroups: bonding group (dual-curing resin adhesive) and unbonded group. Afterwards, these specimens were subjected to vertical compressive loading; the maximum force at fracture and patterns of failure were recorded.

RESULTS AND CONCLUSION: (1) In these groups, the maximum fracture strength was (313.22±56.00) MPa for IPS e.max CAD bonding group; the minimum fracture strength was (15.85±5.20) MPa for CEREC Blocs unbonded group. The fracture strength of IPS e.max CAD was higher than that of the other five groups (P < 0.05). The fracture strength of the bonding group was greater than that of the unbonded group (P < 0.05). There was no significant difference in the fracture strength of the Lava Ultimate and CEREC Blocs groups. (2) In the unbonded group, only fractured porcelain pieces were detected. In the bonding group, fracture of porcelain pieces was often accompanied by tooth fractures. The tooth fracture rate of the bonding group was greater than that of the unbonded group (P < 0.05). There was no significant difference in the failure mode between all-ceramic materials (P > 0.05). (3) Under the condition of this study, the highest fracture strength was found with the IPS e.max CAD material in the three kinds of CAD/CAM all ceramic materials.

 

Key words: Dental Porcelain, Inlays, Compressive Strength, Tissue Engineering

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