3D打印多孔钛合金桩的粘接强度及粘接破坏模式和表面、粘接界面特征  

Bonding strength,bonding failure mode,surface and bonding interface characteristics of 3D printed porous titanium alloy posts

作　　者：李宁 王丁 孙琳瑶[2] 白保晶[2] LI Ning;WANG Ding;SUN Linyao;BAI Baojing(Department of Stomatology,Civil Aviation General Hospital,Beijing 100123,China;不详)

机构地区：[1]民航总医院口腔科,北京100123 [2]首都医科大学附属北京口腔医院修复科

出　　处：《山东医药》2024年第24期52-56,共5页Shandong Medical Journal

基　　金：民航总医院医学科学研究基金(201947)。

摘　　要：目的 观察3D打印多孔钛合金桩的粘接强度及粘接破坏模式和表面、粘接界面特征,以期利用多孔结构的机械嵌合来提高金属桩核的粘接强度。方法 实验设计4组,A组选取10根预成纤维桩,扫描并获取三维数据,B、C、D组均使用A组获得的数据分别进行3D打印实心钛合金桩、3D打印多孔钛合金桩、氧化锆桩的设计与制作,将各组桩包埋、切片,使用万能力学实验机将桩从桩核树脂中推出,记录各组桩的粘接强度和粘接破坏模式,并用扫描电镜观察桩的表面、粘接界面特征。结果 A、B、C、D组粘接强度分别为(229.11±80.15)、(389.29±58.39)、(572.35±128.08)、(137.54±26.81)MPa,组间两两比较,P均<0.05。A、B、C、D组粘接界面破坏的例数分别为7、2、1、8例,粘接内部破坏的例数分别为0、1、3、0例,混合粘接破坏的例数分别为3、7、6、2例,组间两两比较,P均<0.05。A组扫描电镜下可见纤维桩表面大量排列紧密的纤维束,纤维桩与桩核树脂结合紧密;B组可见3D打印实心钛合金桩的表面有大量点状颗粒,点状颗粒间可见树脂嵌入,钛合金实心桩与桩核树脂结合紧密;C组可见3D打印多孔钛合金桩表面大量不规则空隙,桩的表面也存在大量点状颗粒,在颗粒间以及空隙间可见大量树脂嵌入,极大的增加了桩与桩核树脂的机械嵌合作用;D组可见氧化锆桩和表面相对平整,桩与桩核树脂结合紧密,机械嵌合明显少于前面三组。结论 与预成纤维桩、氧化锆桩和3D打印实心钛合金桩相比,使用3D打印技术制作的多孔钛合金桩,粘接强度有明显的提升,粘接破坏模式主要为混合粘接破坏,桩表面有大量不规则空隙及点状颗粒,在颗粒间及空隙间可见大量树脂嵌入,极大增加了桩与桩核树脂的机械嵌合作用。Objective To observe the bonding strength,bonding failure mode,surface and bonding interface char-acteristics of 3D printed porous titanium alloy posts,in order to improve the bonding strength of metal posts by utilizing me-chanical interlocking of porous structures.Methods Four experimental groups were designed.In the group A,we se-lected 10 preformed fiber posts,scanned and obtained three-dimensional data.In the groups B,C,and D,we used the data obtained from group A to design and manufacture 3D printed solid titanium alloy posts,3D printed porous titanium alloy posts,and zirconia posts.The posts were embedded and sliced,and the posts were pushed out of the resin using a universal mechanical testing machine.The bonding strength and bonding failure mode of posts in each group were record-ed,and the surface and bonding interface characteristics of the posts were observed using a scanning electron micro-scope.Results The adhesive strengths of groups A,B,C,and D were(229.11±80.15),(389.29±58.39),(572.35±1280.8),and(137.54±26.81)MPa,respectively,with statistically significant difference between every two groups(all P<0.05).The numbers of cases of adhesive interface failure in the groups A,B,C,and D were 7,2,1,and 8,respectively;the numbers of cases of internal adhesive failure were 0,1,3,and 0,respectively;the numbers of cases of mixed adhesive failure were 3,7,6,and 2,respectively;there were statistically significant differences between every two groups(all P<0.05).Under the scanning electron microscope,in the group A,a large number of tightly arranged fi-ber bundles were seen on the surface of the fiber post,and the fiber post was tightly bonded to the post core resin;in the group B,there were a large number of spot-shaped particles on the surface of the 3D printed solid titanium alloy posts,with resin embedded between the spot-shaped particles,and the titanium alloy solid post was tightly bonded to the post-core res-in;in the group C,there were a large number of irregular voids on the surface of 3D printed po

关 键 词：3D打印技术 3D打印实心钛合金桩 3D打印多孔钛合金桩 氧化锆桩 预成纤维桩 粘接强度 粘接破坏模式 

分 类 号：R783.4[医药卫生—口腔医学]