不同配方新型牙用玻璃陶瓷的显微结构与力学性能  

Microstructure and mechanical properties of the new dental glass ceramics with different formulations

作　　者：任世鹏[1] 陈新民[2] 青松[1] 喻洁 杨婷 唐婉容[1] Ren Shipeng;Chen Xinmin;Qing Song;Yu Jie;Yang Ting;Tang Wanrong(Department of Stomatology,Affiliated Hospital of North Sichuan Medical College,Nanchong 637000,Sichuan Province,China;Department of Prosthodontics,West China Hospital of Stomatology,Sichuan University,Chengdu 610000,Sichuan Province,China)

机构地区：[1]川北医学院附属医院口腔科,四川省南充市637000 [2]四川大学华西口腔医院修复科,四川省成都市610000

出　　处：《中国组织工程研究》2021年第34期5427-5431,共5页Chinese Journal of Tissue Engineering Research

基　　金：南充市校合作课题(19SXHZ0350),项目负责人:唐婉容;川北医学院校级科研课题(CBY17-A-YB48),项目负责人:喻洁。

摘　　要：背景:通过调整基础玻璃的成分和工艺制度可以得到各种符合预定性能的微晶玻璃。目的:通过不同配方制取以二硅酸锂为主晶相的玻璃陶瓷,晶化后对其力学性能和显微结构进行测定。方法:以二硅酸锂为主晶相,通过熔融法制备不同配方的G1、G2、G3号玻璃胚体,打磨、抛光,相对面互相平行。将G1、G2、G3号玻璃胚体进行晶化热处理(以10℃/min升温至606℃保温30 min,继续升温至880℃保温30 min),打磨、抛光、干燥,以未晶化热处理的G1号玻璃胚体为空白对照。测定各组玻璃陶瓷的弯曲强度、弹性模量、努普硬度及显微结构。结果与结论:①G1、G2、G3号玻璃陶瓷的弯曲强度和弹性模量均高于空白对照组(P<0.05),G1、G2、G3号玻璃陶瓷的弯曲强度和弹性模量比较差异均无显著性意义(P>0.05);②G1、G2、G3号玻璃陶瓷的努普硬度均高于空白对照组(P<0.05),G1、G2、G3号玻璃陶瓷的努普硬度比较差异均无显著性意义(P>0.05);③扫描电镜显示,G1、G2、G3号玻璃陶瓷的主晶相均为二硅酸锂,但配方的改变导致其微观结构出现差异,G1、G3号玻璃陶瓷的显微结构相似,晶体形态为棒状,大小均匀,晶体含量较高;G2号玻璃陶瓷晶体形态呈片状,大小不均匀,晶体含量较高;④结果表明,该新型玻璃陶瓷的力学性能与IPS e.max Press接近,是一种有开发前景的修复材料。BACKGROUND:Through adjusting the base glass elements and process system,glass-ceramic with specific features can be expected to obtain.OBJECTIVE:To prepare a self-formulated lithium disilicate glass-ceramic,and determine their mechanical properties and microstructures after crystallization.METHODS:Using lithium disilicate as the basic composition of glass,G1,G2,and G3 glass base bodies were fabricated with different formulations by melting method.After burnishing and polishing,relative surface was kept parallel.The glass base bodies of No.G1,G2,and G3 were prepared by crystallization heat treatment(increase the temperature to 606℃ for 30 minutes,then 880℃ in speed of 10℃/min as keeping the temperature for 30 minutes).The glass was burnished,polished,and dried.The glass base body of No.G1 without crystallization heat treatment was set as blank control.The bending strength,elastic modulus,Knoop hardness and microstructure of each group of glass-ceramic were measured in each group.RESULTS AND CONCLUSION:(1)The bending strength and elastic modulus of G1,G2,and G3 glass ceramics were significantly higher than those of blank control group(P<0.05),and there was no significant difference in bending strength and elastic modulus of G1,G2,and G3 glass ceramics(P>0.05).(2)The Knoop hardness of G1,G2,and G3 glass ceramics was significantly higher than that of blank control group(P<0.05),and there was no significant difference in Knoop hardness of G1,G2,and G3 glass ceramics(P>0.05).(3)The results of scanning electron microscopy showed that the main crystal phase of G1,G2,and G3 glass ceramics was lithium disilicate,but the microstructures of those glass ceramics were changed by adjusting the processing formula.G1 and G3 glass ceramics have similar microstructure.The crystalline forms of the samples were rodlike crystals with uniform size and high crystal content.The crystalline form of G2 was flakes,inhomogeneous in size,and high in crystal content.(4)The results showed that the mechanic performance of this new type of

关 键 词：材料 玻璃陶瓷 二硅酸锂 玻璃胚体 晶化 机械性能 显微结构 

分 类 号：R459.9[医药卫生—治疗学] R318.08[医药卫生—临床医学]