Biomechanical Evaluation of Amorphous Calcium Phosphate Coated TNTZ Implants Prepared Using a Radiofrequency Magnetron Sputtering System

Naru Shiraishi; Rong Tu; Risa Uzuka; Takahisa Anada; Takayuki Narushima; Takashi Goto; Mitsuo Niinomi; Keiichi Sasaki; Osamu Suzuki

doi:10.2320/matertrans.M2012078

Naru Shiraishi, Rong Tu, Risa Uzuka, Takahisa Anada, Takayuki Narushima, Takashi Goto, Mitsuo Niinomi, Keiichi Sasaki, Osamu Suzuki

Author information

Naru Shiraishi
Research Unit for Interface Oral Health Science, Graduate School of Dentistry, Tohoku University
Rong Tu
Institute for Materials Research, Tohoku University
Risa Uzuka
Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University
Takahisa Anada
Division of Craniofacial Function Engineering, Graduate School of Dentistry, Tohoku University
Takayuki Narushima
Department of Materials Processing, Graduate School of Engineering, Tohoku University
Takashi Goto
Institute for Materials Research, Tohoku University
Mitsuo Niinomi
Institute for Materials Research, Tohoku University
Keiichi Sasaki
Division of Advanced Prosthetic Dentistry, Graduate School of Dentistry, Tohoku University
Osamu Suzuki
Division of Craniofacial Function Engineering, Graduate School of Dentistry, Tohoku University

Keywords: amorphous calcium phosphate, dental implant, osseointegration, push-in test, Ti–29Nb–13Ta–4.6Zr (TNTZ)

JOURNAL FREE ACCESS

2012 Volume 53 Issue 7 Pages 1343-1348

DOI https://doi.org/10.2320/matertrans.M2012078

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Abstract

Ti–29Nb–13Ta–4.6Zr alloy (TNTZ), a new β-type Ti alloy, has excellent advantages as a biomaterial, such as low Young’s modulus and cytotoxicity, and the absence of allergens. However, it is unclear whether TNTZ can achieve sufficient osseointegration for it to be used as a dental implant. The effectiveness of surface modification of TNTZ implants by radiofrequency (RF) magnetron sputtering is also unclear. We investigated the biomechanical behaviors of TNTZ implants in vivo, using cylindrical implants of four types: pure Ti, TNTZ, and pure Ti and TNTZ coated with amorphous calcium phosphate (ACP). The implants were inserted in rat femurs, and the femurs were subjected to biomechanical analyses after various time intervals. The results suggest that TNTZ implants can achieve osseointegration similar to that of pure Ti, and that surface modification with ACP by RF magnetron sputtering improves osseointegration, especially in the later stages of healing.

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