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Article

UV-Pre-Treated and Protein-Adsorbed Titanium Implants Exhibit Enhanced Osteoconductivity

1
Weintraub Center for Reconstructive Biotechnology, Division of Advanced Prosthodontics, UCLA School of Dentistry, Los Angeles, CA 90095-1668, USA
2
Department of Oral Pathology, School of Dentistry, Aichi Gakuin University, 1-1-100 Kusumoto-cho, Chikusa-ku, Aichi 464-8650, Japan
3
Department of Oral Science, Graduate School of Dentistry, Kanagawa Dental University, 82 Inaoka, Kanagawa 238-8580, Japan
4
Department of Oral and Maxillofacial Surgery, Graduate School of Medicine, Yokohama City University, 3-9 Fukuura, Kanazawa-ku, Kanagawa 236-0004, Japan
5
Department of Oral and Maxillofacial Surgery/Orthodontics, Yokohama City University Medical Center, 4-57 Urafune-cho, Kanagawa 232-0024, Japan
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Int. J. Mol. Sci. 2020, 21(12), 4194; https://doi.org/10.3390/ijms21124194
Received: 3 June 2020 / Accepted: 10 June 2020 / Published: 12 June 2020
(This article belongs to the Special Issue Functional Materials for Bone Regeneration: Biomaterials and Cells)
Titanium materials are essential treatment modalities in the medical field and serve as a tissue engineering scaffold and coating material for medical devices. Thus, there is a significant demand to improve the bioactivity of titanium for therapeutic and experimental purposes. We showed that ultraviolet light (UV)-pre-treatment changed the protein-adsorption ability and subsequent osteoconductivity of titanium. Fibronectin (FN) adsorption on UV-treated titanium was 20% and 30% greater after 1-min and 1-h incubation, respectively, than that of control titanium. After 3-h incubation, FN adsorption on UV-treated titanium remained 30% higher than that on the control. Osteoblasts were cultured on titanium disks after 1-h FN adsorption with or without UV-pre-treatment and on titanium disks without FN adsorption. The number of attached osteoblasts during the early stage of culture was 80% greater on UV-treated and FN-adsorbed (UV/FN) titanium than on FN-adsorbed (FN) titanium; osteoblasts attachment on UV/FN titanium was 2.6- and 2.1-fold greater than that on control- and UV-treated titanium, respectively. The alkaline phosphatase activity of osteoblasts on UV/FN titanium was increased 1.8-, 1.8-, and 2.4-fold compared with that on FN-adsorbed, UV-treated, and control titanium, respectively. The UV/FN implants exhibited 25% and 150% greater in vivo biomechanical strength of bone integration than the FN- and control implants, respectively. Bone morphogenetic protein-2 (BMP-2) adsorption on UV-treated titanium was 4.5-fold greater than that on control titanium after 1-min incubation, resulting in a 4-fold increase in osteoblast attachment. Thus, UV-pre-treatment of titanium accelerated its protein adsorptivity and osteoconductivity, providing a novel strategy for enhancing its bioactivity. View Full-Text
Keywords: titanium implants; osteoblast; fibronectin; UV-photofunctionalization; bone morphogenetic protein-2; mechanical anchorage; osteoconductivity titanium implants; osteoblast; fibronectin; UV-photofunctionalization; bone morphogenetic protein-2; mechanical anchorage; osteoconductivity
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MDPI and ACS Style

Sugita, Y.; Saruta, J.; Taniyama, T.; Kitajima, H.; Hirota, M.; Ikeda, T.; Ogawa, T. UV-Pre-Treated and Protein-Adsorbed Titanium Implants Exhibit Enhanced Osteoconductivity. Int. J. Mol. Sci. 2020, 21, 4194. https://doi.org/10.3390/ijms21124194

AMA Style

Sugita Y, Saruta J, Taniyama T, Kitajima H, Hirota M, Ikeda T, Ogawa T. UV-Pre-Treated and Protein-Adsorbed Titanium Implants Exhibit Enhanced Osteoconductivity. International Journal of Molecular Sciences. 2020; 21(12):4194. https://doi.org/10.3390/ijms21124194

Chicago/Turabian Style

Sugita, Yoshihiko, Juri Saruta, Takashi Taniyama, Hiroaki Kitajima, Makoto Hirota, Takayuki Ikeda, and Takahiro Ogawa. 2020. "UV-Pre-Treated and Protein-Adsorbed Titanium Implants Exhibit Enhanced Osteoconductivity" International Journal of Molecular Sciences 21, no. 12: 4194. https://doi.org/10.3390/ijms21124194

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