Enhanced osteoblast response to hydrophilic strontium and/or phosphate ions-incorporated titanium oxide surfaces

Clinical Oral Implants Research
Jin-Woo ParkJe-Hee Jang

Abstract

This study investigated the surface characteristics and in vitro biocompatibility of titanium (Ti) surfaces incorporated with strontium ions (Sr) and/or phosphate ions (P) produced by hydrothermal treatment for future applications as endosseous implant surfaces. Sr and/or P-incorporated Ti oxide surfaces were produced by hydrothermal treatment. The surface characteristics were evaluated by scanning electron microscopy, thin-film X-ray diffractometry, X-ray photoelectron spectroscopy, contact angle and surface energy measurements, inductively coupled plasma atomic emission spectroscopy, and profilometry. MC3T3-E1 pre-osteoblast cell attachment, morphology of spread cells, viability, and quantitative analysis of osteoblastic gene expression on grit-blasted microrough (RBM), P-incorporated (P), and P- and Sr-incorporated (SrP) Ti surfaces were evaluated. Microstructured P and SrP surfaces showed significantly higher wettability and surface energy compared with RBM surfaces (P<0.01). After immersion in Hank's balanced salt solution, considerable apatite deposition was observed on the P and SrP surfaces. Sr incorporation significantly increased cellular attachment and viability compared with other surfaces (P<0.05). Real-time polyme...Continue Reading

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