激光及涂层表面处理对氧化锆陶瓷粘接强度的影响OA北大核心CSTPCDMEDLINE
Effect of laser and coating surface treatment on the bond strength of zirconia ceramics
目的 探讨Er:YAG激光、Nd:YAG激光及硅锆涂层处理氧化锆陶瓷表面对其粘接强度的影响.方法 用粉末压片机制作直径为18 mm、厚度为1.5 mm的氧化锆预烧结圆形瓷片,按照伪随机数字表法随机分为5组,分别接受不处理烧结(空白对照组)、烧结后氧化铝颗粒喷砂(喷砂组)、烧结后Er:YAG激光照射(Er:YAG激光组)、烧结后Nd:YAG激光照射(Nd:YAG激光组)、硅锆涂层后烧结(硅锆涂层组)表面处理,用树脂粘接剂粘接氧化锆陶瓷与复合树脂柱,用万能测试机进行剪切强度测试,体式显微镜下观察并记录断裂破坏模式,粗糙度测量仪测量瓷片表面粗糙度,扫描电子显微镜下观察表面微观形貌,能谱仪分析表面元素组成.结果 剪切粘接强度测试结果表明,硅锆涂层组的剪切粘接强度高于其余各组,差异有统计学意义(P<0.05);喷砂组与Er:YAG激光组的粘接强度差异无统计学意义(P>0.05),但均高于Nd:YAG激光组,差异有统计学意义(P<0.05).粗糙度测量结果表明,硅锆涂层组的表面粗糙度高于其余各组,差异有统计学意义(P<0.05);喷砂组、Er:YAG激光组和Nd:YAG激光组的表面粗糙度差异无统计学意义(P>0.05),但均高于空白对照组(P<0.05).扫描电子显微镜下观察可见,喷砂组表面可见无规则深浅不同的划痕,Er:YAG激光组表面可见激光作用形成的较大凹坑,较大凹坑中可见散在较小的孔洞,氧化锆晶体结构消失,取而代之的是局部熔融形成的相对平整表面,表面可见大量裂纹.Nd:YAG激光组表面可见激光作用区形成凹坑,凹坑表面可见大量裂纹形成.硅锆涂层组表面可见较为复杂的多孔结构,可见大量"小岛样"结构,"小岛样"结构表面及其周围沟壑内可见大量氧化锆晶粒,晶粒间存在大量微小孔隙.空白对照组、Er:YAG激光组及Nd:YAG激光组表面仅有Zr、O、Y元素,喷砂组表面可见Al元素存在,硅锆涂层组可见较高比例的Si元素.结论 Er:YAG激光及Nd:YAG激光处理氧化锆陶瓷表面可使其粗糙度增加,提高与树脂粘接剂间的粘接强度.硅锆涂层处理能增加氧化锆表面粗糙度和粘接强度,且效果优于喷砂及激光处理.
Objective This study aims to investigate bond strength between zirconia and resin cement through sur-face treatments with Er:YAG laser,Nd:YAG laser,and Si-Zr coating.Methods Seventy-five round pre-sintered zirco-nia discs with a diameter of 18 mm and a thickness of 1.5 mm were prepared by a powder compactor.Fifty discs were randomly divided into five groups of 10 discs each and were subjected to five surface treatments:no treatment(control group),sandblasting with alumina particles(sandblasting group),Er:YAG laser treatment(Er:YAG laser group),Nd:YAG laser treatment(Nd:YAG laser group),and Si-Zr coating treatment(Si-Zr coating group).The discs were then bonded to composite resin columns with resin cement.The shear bond strength of each group was tested with a universal tester.Roughness tester,scanning electron mi-croscope(SEM),and energy dispersive spectroscopy were used to analyze surface performance.Results The bond strength of the Si-Zr coating group was higher than that of the remaining groups(P<0.05).The difference in bond strength between the sandblasting group and the Er:YAG laser group was not statistically significant(P>0.05),but both of them had higher bond strength than the Nd:YAG laser group(P<0.05).The Si-Zr coating group had the highest sur-face roughness(P<0.05).The surface roughness of the sandblasting,Er:YAG laser,and Nd:YAG laser groups was high-er than that of the control group(P<0.05),but the difference among the three groups was not statistically significant(P>0.05).SEM observations showed irregular scratches on the surface of the sandblasting group and large pits with holes on the surface of the Er:YAG and Nd:YAG laser groups.In the Er:YAG laser group,the crystal structure was replaced by a smooth surface with a large amount of microcracks due to partial melting.Complex porous structures that comprised"is-land-like"structures and mass pores among the grains were observed on the surface of the Si-Zr coating.Only Zr,O,and Y were detected on the surfaces of the control,Er:YAG laser,and Nd:YAG laser groups.Al was found on the surface of the sandblasted group,and a higher proportion of Si was detected on the surface of the Si-Zr coating group.Conclusion Er:YAG laser and Nd:YAG laser treatment on the zirconia ceramic surface could increase roughness and improve the bond strength to resin cement.Si-Zr coating treatment is an effective alternative for increasing the roughness and bond strength of zirconia surface and is superior to sandblasting and laser treatments.
杜桥;牛光良
北京中西医结合医院口腔科,北京 100039
口腔医学
氧化锆表面处理粘接强度激光涂层
zirconiasurface treatmentbond strengthlasercoating
《华西口腔医学杂志》 2024 (003)
359-364 / 6
National Key Research and Development Program(2017YFC1104300);Scientific Research and Cultiva-tion Program of Beijing Hospital of Integrated Traditional Chinese and Western Medicine(zxykt202303)国家重点研发计划(2017YFC1104300);北京中西医结合医院科研培育计划(zxykt202303)
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