摘要
目的 本研究旨在探讨负压对不同粗糙度钛与树脂粘接剂粘接性能的影响。方法 铸造钛片(1×10×10)mm抛光后随机分为4组(n=50)。1组(对照组):只作抛光处理;2、3和4组用110μm氧化铝分别在0.2 MPa、0.3 MPa和0.4 MPa的压力下喷砂。扫描电镜观察钛表面形貌并测量粗糙度。随机将每组分为2个亚组:常压(A)组和负压(S)组。A组常规用Panavia F树脂粘接剂粘接钛与树脂柱;S组在钛表面涂布Panavia F粘接剂后,在-0.1 MPa的负压箱内放置20 s,然后粘接树脂柱。每组随机选取一试件纵切,电镜观察粘接界面。将半数试件进行冷热循环(10000次),对冷热循环前后的粘接试件进行剪切强度测试并分析断裂模式。采用双因素方差分析和Tukey LSD对数据进行统计分析。结果 随着喷砂压力的增加,钛表面粗糙度显著增加(P<0.05)。冷热循环前后,S组的剪切强度均显著高于A组(P<0.05), S3组的剪切强度最高(P<0.05)。S组混合断裂的比例明显增加(P<0.05)。扫描电镜显示,与A组相比,S组试件与粘接剂结合更紧密。结论 负压能显著提高钛与树脂粘接剂的剪切强度,并改善粘接的耐久性。
Objective To evaluate the effect of subpressure on the bonding between titanium and resin adhesive.Methods After polishing with 600-grit silicon, cast titanium disks were randomly divided into 4 groups(n=50), group one was untreated as control,groups 2, 3 and 4 were sandblasted with 110 μm aluminia at the pressure of 0.2 MPa, 0.3 MPa,and 0.4 MPa, respectively. The surface morphology was observed by scanning electron microscopy(SEM) and the roughness was measured. Each group was divided into two subgroups, atmospheric pressure(A) and subpressure(S) groups. Group S was put into a subpressure box at-0.1 MPa for 20s after appliying the Panavia F on the titanium surface, and group A was manufactured according to the manufacturer’s instructions. Then the resin columns were bonded. One specimen in each group was randomly selected to observe the bonding interface. Half of the specimens was subjected to thermocycle(10000 cycles).Before and after the thermocycling, the shear bonding strength tests were performed and the failure mode was analyzed.The data were analyzed by two-way ANOVA and Tukey LSD analysis(P<0.05). Results With the increase of sandblasting pressure, the surface roughness of titanium increased significantly(P<0.05). Before and after thermal cycling, the shear bond strength of subpressure groups were higher than that of group A(P<0.05), and the shear bonding strength of group S3 was the highest(P<0.05). The proportion of mixed fracture increased significantly after subpressure treatment(P<0.05). SEM showed that compared with group A, the surface of group S was combined more closely with the adhesive. Conclusions Subpressure could significantly improve the shear bonding strength and the durability of titanium-resin adhesives.
作者
丁宁
李永梅
唐爽
张祖太
DING Ning;LI Yong-mei;TANG Shuang;ZHANG Zu-tai(Beijing Institute of Dental Research,School of Stomatology,Capital Medical University,Beijing 100050,China)
出处
《北京口腔医学》
CAS
2022年第6期402-406,共5页
Beijing Journal of Stomatology
基金
国家自然科学基金(81671027)。
关键词
负压
钛
喷砂
剪切强度
耐久性
Subpressure
Titanium
Sandblast
Shear bonding strength
Durability
