光固化成型ZTA全瓷冠的机械性能及精度研究

doi:10.13701/j.cnki.kqyxyj.2021.06.016

口腔医学研究 ›› 2021, Vol. 37 ›› Issue (6): 554-558.DOI: 10.13701/j.cnki.kqyxyj.2021.06.016

光固化成型ZTA全瓷冠的机械性能及精度研究

陈欢欢¹, 朱莉¹, 宋逸婷¹, 蔡孟哲¹, 徐一迪¹, 黄盛斌^1,2, 麻健丰^1,2*

1.温州医科大学口腔医学研究所浙江温州 325027;
2.温州医科大学口腔医学院附属口腔医院浙江温州 325027

收稿日期:2021-01-21 出版日期:2021-06-28 发布日期:2021-06-17
通讯作者: *麻健丰,E-mail:dentistmacn@aliyun.com
作者简介:陈欢欢(1994~ ),女,浙江温州人,硕士在读,研究方向:口腔修复学。
基金资助:
国家自然科学基金(编号:81870813);温州市重大科技专项项目(编号:2018ZY012)

Mechanical Properties and Precision Analysis of Zirconia Toughened Alumina Crowns Fabricated by Stereolithography Method

CHEN Huanhuan¹, ZHU Li¹, SONG Yiting¹, CAI Mengzhe¹, XU Yidi¹, HUANG Shengbin^1,2, MA Jianfeng^1,2*

1. Institute of Stomatology, Wenzhou Medical University, Wenzhou 325027, China;
2. School and Hospital of Stomatology, Wenzhou Medical University, Wenzhou 325027, China

Received:2021-01-21 Online:2021-06-28 Published:2021-06-17

摘要/Abstract

摘要： 目的:研究利用立体光固化成型(stereolithography,SLA)技术制作氧化锆增韧氧化铝(zirconia toughened alumina,ZTA)试件的机械性能及其全瓷冠的精度研究,为其临床应用提供实验依据。方法:将SLA技术制作的ZTA试件(SL组,stereolithography)与数控切削的氧化锆试件(CM组,CAD/CAM milling)进行抗弯强度(ISO 6872)、硬度、断裂韧性、脆性指数比较,并制作相应全瓷冠进行精度比较。结果:虽然SL组抗弯强度小于CM组(P＞0.05),但已达(579.01±43.24) MPa,符合包含磨牙的三单位修复体基底陶瓷的最小挠曲强度临床标准;硬度及脆性指数大于CM组,断裂韧性小于CM组,差异均有统计学意义(P＜0.05)。SL组全瓷冠的精度在外表面与CM组无明显差异(P＞0.05),在内表面比CM组较差(P＜0.05)。结论:利用SLA技术制作ZTA全瓷冠的机械性能及精度能初步满足临床要求,但与数控切削技术仍有一定差距,在后期临床应用推广前尚需优化。

关键词: 氧化锆增韧氧化铝, 立体光固化成型技术, 计算机辅助设计/计算机辅助制造, 全瓷冠, 精度

Abstract: Objective: To evaluate the mechanical properties and precision of zirconia toughened alumina (ZTA) crowns fabricated by stereolithography (SLA) method. Methods: ZTA specimens (group SL) were made by SLA technology and zirconia specimens (group CM) were made by CAD/CAM milling technology. The flexural strength, Vickers hardness, fracture toughness, and brittleness index were compared. Ten ZTA crowns were made by SLA technology and ten zirconia crowns were made by CAD/CAM milling technology. The precision was evaluated. Results: Although the flexural strength of group SL was lower than that of group CM (P＞0.05), it satisfied the clinical requirement (579.01±43.24) MPa. The Vickers hardness and brittleness index of group SL were higher than group CM, and the fracture toughness of group SL was lower than group CM (P＜0.05). There was no significant difference on the precision between two all-ceramic crown groups in the outer surface (P＞0.05), however, significant difference in the inner surface (P＜0.05). Conclusion: Although in the clinical acceptable range, the mechanical properties and precision of ZTA crowns made by SLA method are still less than those of crowns made by CAD/CAM milling technology. It needs further optimization

Key words: zirconia toughened alumina, stereolithography, CAD/CAM, all-ceramic crown, precision

陈欢欢, 朱莉, 宋逸婷, 蔡孟哲, 徐一迪, 黄盛斌, 麻健丰. 光固化成型ZTA全瓷冠的机械性能及精度研究[J]. 口腔医学研究, 2021, 37(6): 554-558.

CHEN Huanhuan, ZHU Li, SONG Yiting, CAI Mengzhe, XU Yidi, HUANG Shengbin, MA Jianfeng. Mechanical Properties and Precision Analysis of Zirconia Toughened Alumina Crowns Fabricated by Stereolithography Method[J]. Journal of Oral Science Research, 2021, 37(6): 554-558.

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光固化成型ZTA全瓷冠的机械性能及精度研究

Mechanical Properties and Precision Analysis of Zirconia Toughened Alumina Crowns Fabricated by Stereolithography Method

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