Preliminary study of the biomechanical behavior and physical characteristics of tantalum (Ta)-coated prostheses
| Autor: | Dayu Yin, Mao Li, Lie Liu, Fei Guo, Haoping Li, Lei Shi, Ling Wang, Qingsheng Zhu, Yonghong Duan, Chi Jiang |
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| Rok vydání: | 2011 |
| Předmět: |
Male
Materials science Biocompatibility Surface Properties Tantalum chemistry.chemical_element Materials testing Bone and Bones Biomechanical Phenomena Adhesion strength Bone volume fraction Coated Materials Biocompatible Materials Testing Animals Orthopedics and Sports Medicine Electron probe microanalysis Prostheses and Implants chemistry Microscopy Electron Scanning Surgery Rabbits Stress Mechanical Biomedical engineering Electron Probe Microanalysis |
| Zdroj: | Journal of orthopaedic science : official journal of the Japanese Orthopaedic Association. 17(2) |
| ISSN: | 1436-2023 |
| Popis: | Use of Ta biomaterials in medicine started in the middle of the last century. The good biocompatibility and chemical stability, and the unique physical characteristics of Ta metal have resulted in many possible developments of Ta biomaterials.In this study, histopathological observation, histomorphometric analysis, scanning electron microscope (SEM) observation, energy-dispersive X-ray spectroscopy (EDX) analysis, biomechanical testing, and examination of the coating's mechanical strength have been used to evaluate the value of clinical application of Ta-coated prostheses prepared by a plasma-spraying process.Histopathological observation has demonstrated that the periprosthetic new bone tissues tightly and stably adhere to the Ta coating after the implantation, with no signs of loosening. Early after implantation, there is no significant difference in periprosthetic bone volume and ultimate shear strength between Ta-coated and Ti-coated prostheses (P 0.05). EDX analysis suggests that the ultimate shear stress does not damage Ta coating. Mechanical strength testing shows that the adhesive strength and Vicker's surface hardness (HV) of the Ta coating are significantly higher than those of the Ti coating (P 0.01).Ta coating has good stability and bone biocompatibility; the extraordinary physical characteristics of Ta coating have great significance in maintaining prosthetic stability and surface porosity after implantation. |
| Databáze: | OpenAIRE |
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