Effect of sandblasting particle sizes on bonding strength between porcelain and titanium fabricated by rapid laser forming
10.3760/cma.j.issn.1002-0098.2009.11.010
- VernacularTitle:喷砂粒度对激光快速成形纯钛与瓷结合强度的影响
- Author:
Li-Jun ZHANG
1
;
Zhong-Yi WANG
;
Bo GAO
;
Yang GAO
;
Chun-Bao ZHANG
Author Information
1. 第四军医大学口腔医学院
- Keywords:
Titanium;
Ceramics;
Laser rapid forming;
Flexural strength
- From:
Chinese Journal of Stomatology
2009;44(11):677-680
- CountryChina
- Language:Chinese
-
Abstract:
Objective To evaluate the effect of sandblasting particle sizes of Al_2O_3 on the bonding strength between porcelain and titanium fabricated by laser rapid forming(LRF).Methods The thermal expansion coeffcient,roughness(Ra),contact angle,surface morphology of titanium surface and the bonding strength between titanium and porcelain were evaluated after the titanium surface being sandblasted using different sizes of Al_2O_3(50 μm,120 μm,250 μm)at a pressure of 0.5 MPa.The cast titanium specimens were used as conlrol,and were sandblasted with 50 μm Al_2O_3 at the same pressure.Results The thermal expansion coefficient of cast titanium[(9.84±0.42)×10~(-6)/℃]and LRF Ti[(9.79±0.31)×10~(-6)/℃)matched that of Noritake Ti-22 dentin porcelain[(8.93±0.36)×10~(-6)/℃).When larger size of Al_2O_3 was used,the value of Ra and contact angle increased as well.There was no significant difierente in bonding strength between the LRF Ti-50 μm[(25.91±1.02)MPa]and cast titanium [(26.42±1.65)MPa].Significantly lower bending strength wag found in LRF Ti-120 μm[(21.86±1.64)MPa] and LRF Ti-250 μm[(19.96±1.03)MPa].Conclusions The bond strength between LRF Ti and Nofitake Ti-22 dentin porcelain was above the lower limit value in the ISO 9693(25 MPa)after using 50 μm Al_2O_3 sandblasting in 0.5 MPa air pressure.
