TY - JOUR
T1 - Initial stability of a highly porous titanium cup in an acetabular bone defect model
AU - Yoshimoto, Kensei
AU - Nakashima, Yasuharu
AU - Wakiyama, Miyo
AU - Hara, Daisuke
AU - Nakamura, Akihiro
AU - Iwamoto, Mikio
N1 - Funding Information:
Part of this research was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (No. 15 K10450 ) and Kyocera Medical Corporation . Three of the authors (M.W., A.N., and M.I.) are employed by Kyocera Medical Corporation. We thank Junji Kishimoto, a statistician from the Digital Medicine Initiative, Kyushu University, for his valuable comments and suggestions in regards to the statistical analysis.
Funding Information:
Part of this research was supported by a Grant-in-Aid for Scientific Research from the Japan Society for the Promotion of Science (No. 15 K10450) and Kyocera Medical Corporation. Three of the authors (M.W., A.N., and M.I.) are employed by Kyocera Medical Corporation. We thank Junji Kishimoto, a statistician from the Digital Medicine Initiative, Kyushu University, for his valuable comments and suggestions in regards to the statistical analysis.
Publisher Copyright:
© 2018
PY - 2018/7
Y1 - 2018/7
N2 - Backgrounds: The purpose of this study was to quantify the initial stability of a highly porous titanium cup using an acetabular bone defect model. Methods: The maximum torque of a highly porous titanium cup, with a pore size of 640 μm and porosity of 60%, was measured using rotational and lever-out torque testing and compared to that of a titanium-sprayed cup. The bone models were prepared using a polyurethane foam block and had three levels of bone coverage: 100, 70, and 50%. Results: The highly porous titanium cup demonstrated significantly higher maximum torque than the titanium-sprayed cups in the three levels of bone defects. On rotational torque testing, it was found to be 1.5, 1.3, and 1.3 times stronger than the titanium-sprayed cups with 100, 70 and 50% bone coverage, respectively. Furthermore, it was found to be 2.2, 2.3, and 1.5 times stronger on lever-out testing than the titanium-sprayed cup. No breakage in the porous layers was noted during the testing. Conclusion: This study provides additional evidence of the initial stability of highly porous titanium cup, even in the presence of acetabular bone defects.
AB - Backgrounds: The purpose of this study was to quantify the initial stability of a highly porous titanium cup using an acetabular bone defect model. Methods: The maximum torque of a highly porous titanium cup, with a pore size of 640 μm and porosity of 60%, was measured using rotational and lever-out torque testing and compared to that of a titanium-sprayed cup. The bone models were prepared using a polyurethane foam block and had three levels of bone coverage: 100, 70, and 50%. Results: The highly porous titanium cup demonstrated significantly higher maximum torque than the titanium-sprayed cups in the three levels of bone defects. On rotational torque testing, it was found to be 1.5, 1.3, and 1.3 times stronger than the titanium-sprayed cups with 100, 70 and 50% bone coverage, respectively. Furthermore, it was found to be 2.2, 2.3, and 1.5 times stronger on lever-out testing than the titanium-sprayed cup. No breakage in the porous layers was noted during the testing. Conclusion: This study provides additional evidence of the initial stability of highly porous titanium cup, even in the presence of acetabular bone defects.
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U2 - 10.1016/j.jos.2018.03.007
DO - 10.1016/j.jos.2018.03.007
M3 - Article
C2 - 29657105
AN - SCOPUS:85045239529
SN - 0949-2658
VL - 23
SP - 665
EP - 670
JO - Journal of Orthopaedic Science
JF - Journal of Orthopaedic Science
IS - 4
ER -