title: In vitro and in vivo evaluation of SLA titanium surfaces with further alkali or hydrogen peroxide and heat treatment.
abstract: The present study aimed to evaluate the bioactivity of titanium surfaces sandblasted with large-grit corundum and acid etched (SLA) plus further alkali or hydrogen peroxide and heat treatment for dental implant application. Pure titanium disks were mechanically polished as control surface (Ti-control) and then sandblasted with large-grit corundum and acid etched (SLA). Further chemical modifications were conducted using alkali and heat treatment (ASLA) and hydrogen peroxide and heat treatment (HSLA) alternatively. The surface properties were characterized by scanning electron microscopy (SEM), x-ray photoelectron spectroscopy (XPS), and contact angle and roughness measurements. Further evaluation of surface bioactivity was conducted by MC3T3-E1 cell attachment, proliferation, morphology, alkaline phosphatase (ALP) activity and calcium deposition on the sample surfaces. After insertion in the beagle's mandibula for a specific period, cylindrical implant samples underwent micro-CT examination and then histological examination. It was found that ASLA and HSLA surfaces significantly increased the surface wettability and MC3T3-E1 cell attachment percentage, ALP activity and the quality of calcium deposition in comparison with simple SLA and Ti-control surfaces. Animal studies showed good osseointegration of ASLA and HSLA surfaces with host bone. In conclusion, ASLA and HSLA surfaces enhanced the bioactivity of the traditional SLA surface by integrating the advantages of surface topography, composition and wettability.
authors.affiliation: State Key Laboratory for Turbulence and Complex System, Department of Advanced Materials and Nanotechnology, College of Engineering, Peking University, Beijing 100871, People's Republic of China. enwei@pku.edu.cn
authors.forename: E W
authors.initials: EW
authors.lastname: Zhang
authors.forename: Y B
authors.initials: YB
authors.lastname: Wang
authors.forename: K G
authors.initials: KG
authors.lastname: Shuai
authors.forename: F
authors.initials: F
authors.lastname: Gao
authors.forename: Y J
authors.initials: YJ
authors.lastname: Bai
authors.forename: Y
authors.initials: Y
authors.lastname: Cheng
authors.forename: X L
authors.initials: XL
authors.lastname: Xiong
authors.forename: Y F
authors.initials: YF
authors.lastname: Zheng
authors.forename: S C
authors.initials: SC
authors.lastname: Wei
mesh_terms: D016475:3T3 Cells; D000818:Animals; D002118:Calcium / Q000737:chemistry; D002448:Cell Adhesion; D018929:Cell Culture Techniques; D049109:Cell Proliferation; D004285:Dogs; D006358:Hot Temperature; D006861:Hydrogen Peroxide / Q000737:chemistry*; D051379:Mice; D008855:Microscopy, Electron, Scanning / Q000379:methods; D016348:Osseointegration; D010006:Osteoblasts / Q000378:metabolism; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D055114:X-Ray Microtomography / Q000379:methods
chemical_list: D006861:Hydrogen Peroxide; D014025:Titanium; D002118:Calcium