The biocompatibility of SLA-treated titanium implants

Abstract

The titanium implant surface was sandblasted with large grits and acid etched (SLA) to increase the implant surface for osseointegration. The topography of the titanium surface was investigated with scanning electron microscopy (SEM) and a profilometer. The SLA implant demonstrated uniform small micro pits (1-2 microm in diameter). The values of average roughness (R(a)) and maximum height (R(t)) were 1.19 microm and 10.53 microm respectively after sandblasting and the acid-etching treatment. In the cell-surface interaction study, the human osteoblast cells grew well in vitro. The in vivo evaluation of the SLA implant placed in rabbit tibia showed good bone-to-implant contact (BIC) with a mean value of 29% in total length of the implant. In the short-term clinical study, SLA implants demonstrated good clinical performance, maintaining good crestal bone height.

Producing Bulk Ultrafine-Grained Materials by Severe Plastic Deformation: Ten Years Later

“…64 The effect of grain refinement of the bulk of the material on the surface characteristics, which in turn control fatigue properties and cellular response, may be weakened by such surface treatments. A recent study 60 shed some light on the effect of sand-blasting combined with acid-etching (the SLA process 65 ) on the fatigue performance of CP Ti. The study demonstrated that the SLA surface treatment of Ti with different bulk microstructures gave rise to different levels of surface roughness.…”

Surface Treatments and Functional Coatings for Biocompatibility Improvement and Bacterial Adhesion Reduction in Dental Implantology

“…Microspheres of diameter in the range 10-540 µm are typically accelerated toward the surface to be treated, using a compressed air or nitrogen blow. Most used grid materials include corundum (Al 2 O 3 ) [9,10], silicon carbide (SiC) [11], titania (TiO 2 ) [12], hydroxyapatite (HA) [13], zirconia (ZrO 2 ) [14], silica (SiO 2 ) [15] and aluminum powders [15]. The main effect of sandblasting is to change the morphology of the treated surface, substantially increasing its roughness.…”

“…The main effect of these acid-etching processes is to modify the implant morphology by producing micro-pits of a few microns diameter on titanium surfaces [16,17]. These processes are commonly applied after sandblasting, and the complete process, usually referred to as sandblasting and large grit acid etching (SLA) [18], is often considered the reference surface treatment to which other ones are compared [12,[16][17][18]. The most common process involves the use of Al 2 O 3 microspheres of 200-540 µm diameter, followed the etching with a mixture of HCl and H 2 SO 4 [16].…”

“…Among the surface modifications aiming at improving abrasion resistance, titanium nitride (TiN) coatings were successfully proposed [122]. For the same reason, tantalum is gaining considerable attention for designing a novel type of dental implant, due to its biocompatibility, corrosion resistance and elastic modulus (1.3-10 GPa) close to that of cortical bone (12)(13)(14)(15)(16)(17)(18). Tantalum promotes bone ingrowth by establishing osseoincorporation that will enhance the secondary stability of implants in bone tissue and is more osteoconductive than titanium or cobalt-chromium alloys.…”

Avaliação da taxa de sobrevida de implantes unitários instalados em maxila com diferentes tratamentos de superfície: estudo retrospectivo

“…Os implantes de superfície tratada com ataque ácido e jateamento de areia ou "sandblasted and acid-etched" (SAE) combinam jateamento com partículas de alumina e condicionamento ácido para obter macro-rugosidade e microporos (Kim et al, 2008). A superfície tratada por oxidação anódica ou "anodic oxidation" (AO) é resultante de um processo eletroquímico que aumenta a superfície da camada de óxido de titânio e de rugosidade (Aalam;Nowzari, 2005).…”