Cheng Chih-Wen, Yang Chun-Chuan, Yan Min
Department of Prosthodontics, Chi Mei Hospital, No.901, Zhonghua Rd., Yongkang Dist., Tainan City 710, Taiwan.
Department of Dental Technology, Shu Zen Junior College of Medicine and Management, No.452, Huanqiu Rd. Luzhu Dist., Kaohsiung City 82144, Taiwan.
J Dent Sci. 2018 Dec;13(4):301-310. doi: 10.1016/j.jds.2018.03.002. Epub 2018 Mar 23.
BACKGROUND/PURPOSE: With the technology of dental prostheses and materials progress, the bond durability of the all-ceramic restoration system plays an important role in the oral environment. The purpose of this study was to evaluate the influence of the parameters of blasting on the shear bond strength between zirconia and pressed veneer ceramics.
Zirconia was blasted with different alumina particle size subjected to two types of applied pressures. Heat-pressed and layered veneer ceramic blocks were served as an experimental group and control group, respectively. The shear strength of specimens after thermocycling for 20,000 times was also investigated to simulate oral environment.
The results indicated that the surface roughness was increased significantly (P < 0.05) with increasing particle size of alumina and blasting pressure. The alumina particle size had statistically significant influence (P < 0.05) on shear strength of heat-pressed groups. Among heat-pressed ceramic specimens, the highest and lowest shear strength could be obtained when 50 μm of alumina was used at pressure of 0.3 MPa and 110 μm of alumina was used at 0.5 MPa, respectively. The negligible effect of thermal cycle on shear strength of heat-pressed groups can be seen.
Blasting with 50 μm of alumina at 0.3 MPa could enhance the bond strength between zirconia and veneer ceramics.
背景/目的：随着牙科修复技术和材料的进步，全瓷修复系统的粘结耐久性在口腔环境中起着重要作用。本研究的目的是评估喷砂参数对氧化锆与热压铸面陶瓷之间剪切粘结强度的影响。
采用不同粒径的氧化铝对氧化锆进行喷砂处理，并施加两种压力。热压铸面陶瓷块和分层铸面陶瓷块分别作为实验组和对照组。还对经过20000次热循环的试件的剪切强度进行了研究，以模拟口腔环境。
结果表明，随着氧化铝粒径和喷砂压力的增加，表面粗糙度显著增加（P<0.05）。氧化铝粒径对热压铸面组的剪切强度有统计学显著影响（P<0.05）。在热压铸面陶瓷试件中，分别使用粒径为50μm的氧化铝在0.3MPa压力下和粒径为110μm的氧化铝在0.5MPa压力下时，可获得最高和最低的剪切强度。热循环对热压铸面组剪切强度的影响可忽略不计。
使用粒径为50μm的氧化铝在0.3MPa压力下喷砂可提高氧化锆与铸面陶瓷之间的粘结强度。
