Objective To review the advances in research on factors of cranioauricular angle formation after auricular reconstruction.Methods The related literature concerning the main surgical methods and influencing factors for...Objective To review the advances in research on factors of cranioauricular angle formation after auricular reconstruction.Methods The related literature concerning the main surgical methods and influencing factors for the ear elevation by Nataga method and dilated method was reviewed and summarized.Results The ear elevation by Nataga method and dilated method has achieved satisfactory clinical results.Although rapid prototyping technology and tissue engineering have developed rapidly,it is still some time before a beautiful and practical cranioauricular angle can be reconstructed.Conclusion The surgical programs for ear elevation by Nataga method and dilated method have been constantly improved in recent years,which provides a great deal of reference for obtaining a beautiful and practical cranioauricular angle.展开更多
Inadequate strength at the bone/cement interface is one of the main drawbacks of poly(methylmethacrylate)(PMMA) bone cement in the current orthopedic surgeries. In the present work, a partially degradable PMMA/Mg comp...Inadequate strength at the bone/cement interface is one of the main drawbacks of poly(methylmethacrylate)(PMMA) bone cement in the current orthopedic surgeries. In the present work, a partially degradable PMMA/Mg composite bone cement (PMC) was developed for enhancing the bone/cement interfacial strength, which is proposed to be accomplished by increasing the osteo-conductivity of PMMA and enhancing the mechanical interlocking between bone tissue and the porous PMMA surface formed by the degradation of Mg on the surface of the cement. PMCs were prepared with various concentrations of Mg particles with different sizes and alloy compositions. The effects of Mg particle size, composition and content on the injectability, mechanical and degradation properties, and biocompatibility of PMCs were evaluated. The results show that these parameters affected the properties of the PMCs simultaneously. The good injectability and compressive strengths of PMMA were preserved, while the compatibility to osteoblasts was enhanced when adding Mg particles in a proper manner. The PMCs degraded at the surface with time and formed porous surface structures in the physiological environment, while maintaining the original compressive strengths. This preliminary study shows that the PMC is promising for minimally invasive orthopedic surgery;however, it still requires to be optimized and evaluated in the future.展开更多
文摘Objective To review the advances in research on factors of cranioauricular angle formation after auricular reconstruction.Methods The related literature concerning the main surgical methods and influencing factors for the ear elevation by Nataga method and dilated method was reviewed and summarized.Results The ear elevation by Nataga method and dilated method has achieved satisfactory clinical results.Although rapid prototyping technology and tissue engineering have developed rapidly,it is still some time before a beautiful and practical cranioauricular angle can be reconstructed.Conclusion The surgical programs for ear elevation by Nataga method and dilated method have been constantly improved in recent years,which provides a great deal of reference for obtaining a beautiful and practical cranioauricular angle.
基金supported by the National Natural Science Foundation of China (Nos. 81501858, 81622032, 51501109 and 51672184)the Principal Project of Natural Science Research of Jiangsu Higher Education Institutions (No. 17KJA180011)+1 种基金Jiangsu Innovation and Entrepreneurship Programthe Priority Academic Program Development of Jiangsu High Education Institutions (PAPD)
文摘Inadequate strength at the bone/cement interface is one of the main drawbacks of poly(methylmethacrylate)(PMMA) bone cement in the current orthopedic surgeries. In the present work, a partially degradable PMMA/Mg composite bone cement (PMC) was developed for enhancing the bone/cement interfacial strength, which is proposed to be accomplished by increasing the osteo-conductivity of PMMA and enhancing the mechanical interlocking between bone tissue and the porous PMMA surface formed by the degradation of Mg on the surface of the cement. PMCs were prepared with various concentrations of Mg particles with different sizes and alloy compositions. The effects of Mg particle size, composition and content on the injectability, mechanical and degradation properties, and biocompatibility of PMCs were evaluated. The results show that these parameters affected the properties of the PMCs simultaneously. The good injectability and compressive strengths of PMMA were preserved, while the compatibility to osteoblasts was enhanced when adding Mg particles in a proper manner. The PMCs degraded at the surface with time and formed porous surface structures in the physiological environment, while maintaining the original compressive strengths. This preliminary study shows that the PMC is promising for minimally invasive orthopedic surgery;however, it still requires to be optimized and evaluated in the future.
