Reality of dental implant surface modification: a short literature review

In-Sung Yeo, In-Sung Yeo

Abstract

Screw-shaped endosseous implants that have a turned surface of commercially pure titanium have a disadvantage of requiring a long time for osseointegration while those implants have shown long-term clinical success in single and multiple restorations. Titanium implant surfaces have been modified in various ways to improve biocompatibility and accelerate osseointegration, which results in a shorter edentulous period for a patient. This article reviewed some important modified titanium surfaces, exploring the in vitro, in vivo and clinical results that numerous comparison studies reported. Several methods are widely used to modify the topography or chemistry of titanium surface, including blasting, acid etching, anodic oxidation, fluoride treatment, and calcium phosphate coating. Such modified surfaces demonstrate faster and stronger osseointegration than the turned commercially pure titanium surface. However, there have been many studies finding no significant differences in in vivo bone responses among the modified surfaces. Considering those in vivo results, physical properties like roughening by sandblasting and acid etching may be major contributors to favorable bone response in biological environments over chemical properties obtained from various modifications including fluoride treatment and calcium phosphate application. Recently, hydrophilic properties added to the roughened surfaces or some osteogenic peptides coated on the surfaces have shown higher biocompatibility and have induced faster osseointegration, compared to the existing modified surfaces. However, the long-term clinical studies about those innovative surfaces are still lacking.

Keywords: Anodic oxidation; BMP; fluoride; functional peptide; hydrophilicity; implant surface; SLA; surface modification..

Figures

Fig. (1)
Fig. (1)
Scanning electron microscopic images (x2000 magnification) of a sandblasted, large-grit, acid-etched (SLA) Ti surface (a) and an anodized Ti surface (b). Note that the SLA surface mainly displays a honeycomb-like structure while the anodized surface shows a crater-like structure.

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