三种CAD/CAM全瓷材料[牙合]贴面抗折能力实验研究  

Study on Fracture Resistance of Occlusal Veneers Fabricated by Three Different CAD/CAM Ceramic Materials

作　　者：黄小艳 董瑞 王培欢 付崇建 柳玉晓 HUANG Xiaoyan;DONG Rui;WANG Peihuan;FU Chongjian;LIU Yuxiao(Department of Stomatology,the 960th Hospital of PLA,Jinan 250031,Shandong,China)

机构地区：[1]解放军第960医院口腔科,山东济南250031

出　　处：《中国美容医学》2024年第8期17-21,共5页Chinese Journal of Aesthetic Medicine

摘　　要：目的:探讨三种CAD/CAM(Computer-aided design/Computer-aided manufacturing)全瓷材料全解剖式[牙合]贴面的抗折能力,为临床应用提供参考。方法:扫描离体下颌右侧第一磨牙建立数字模型,在数字模型上进行[牙合]贴面数字备牙,共四个厚度,分别为1.0 mm、1.5 mm、2.0 mm、2.5 mm,选取二硅酸锂玻璃陶瓷瓷块2种(IPS e.max CAD瓷、VITA SUPRINITY瓷)和树脂基陶瓷瓷块1种(Lava Ultimate优韧瓷),数字设计和数字切削制作相应厚度全瓷[牙合]贴面,每种瓷块每个厚度10例,共获120例[牙合]贴面。将[牙合]贴面加压粘接到3D打印硬质树脂代型上,循环加载后,使用万能材料试验机进行垂直加载试验,记录[牙合]贴面断裂载荷,观察失效模式。使用SPSS 22.0软件对数据进行统计分析。结果:断裂载荷结果显示,在厚度为1.0 mm、1.5 mm、2.0 mm时三种材料间断裂载荷比较差异有统计学意义(P<0.05),厚度为2.5 mm时,两种玻璃陶瓷之间差异无统计学意义(P>0.05),而玻璃陶瓷和树脂基陶瓷之间断裂载荷比较差异有统计学意义(P<0.05)。两种玻璃陶瓷随着厚度增加,断裂载荷也随之增大(P<0.05);树脂基陶瓷厚度为1.0 mm、1.5 mm、2.0 mm时的断裂载荷也随着厚度增大(P<0.05)。三种[牙合]贴面的断裂模式均表现为裂纹,破碎和折裂。结论:三种CAD/CAM全瓷材料全解剖式[牙合]贴面抗折能力均能满足后牙[牙合]面缺损修复的需要,树脂基陶瓷操作步骤相对简单;临床上尽量选择较薄的贴面进行修复,以利于颞下颌关节的适应。Objective To explore the fracture resistance of occlusal veneers fabricated by three different CAD/CAM ceramic materials.Methods A right mandibular first molar with normal morphology in vitro was scanned and its digital model was constructed.Then digital preparation of occlusal veneer were processed on the digital models,the thickness of the digital veneers was 1.0 mm,1.5 mm,2.0 mm,2.5mm separately.Then the data was transferred to the carving machine and the processing of the veneers was completed with a sort of resin-based ceramic ignot and two sorts of lithium disilicate glassceramic ignot.120 occlusal veneers were fabricated while every sort of ceramic ingot with every thickness is 10.Then the occlusal veneers were bonded to the 3D printed hard resin bodies.After cyclic loading,the vertical loading experiment was conducted to the veneers by electric universal test machine.The fracture resistance strength was recorded and the failure modes were observed.SPSS22.0 was used to analyze the data.Results The results of fracture load showed that the difference of fracture load between the three materials was statistically significant when the thickness was 1.0 mm,1.5 mm and 2.0 mm(P<0.05),while there was no statistically significant difference between the two glass-ceramics when the thickness was 2.5 mm(P>0.05).There was significant difference in fracture load between glass ceramics and resinbased ceramics(P<0.05).The fracture load increases with the increase of the thickness of the two glass-ceramics(P<0.05).The fracture load of resin-based ceramics increased with the thickness of 1.0 mm,1.5 mm and 2.0 mm(P<0.05).The fracture modes of the three kinds of occlusal surfaces were cracks,crushing and fracture.Conclusion The fracture resistance of three different CAD/CAM ceramic occlusal veneers can meet the demand of the restoration of posterior tooth occlusal defect,the operation steps of resin-based ceramics are relatively simple.In clinical practice,the thinner veneer should be selected to repair the temporal-mandibula

关 键 词：二硅酸锂玻璃陶瓷 树脂基陶瓷 [牙合]贴面 抗折能力 失效模式 

分 类 号：R783.1[医药卫生—口腔医学]