A study suggests dinosaurs weren’t fading before the asteroid hit – fossil gaps, not a real decline, may explain why their diversity seemed to dip. Credit: SciTechDaily.com Dinosaurs may not have been ...

在全髋关节置换术（THA）中，髋臼杯精准定位至关重要。为解决传统机械对准导向（MAG）方法精度不足的问题，研究人员开展 3D-CT 引导髋臼杯定位技术与 MAG 技术对比研究。结果显示新技术能显著提升定位精度，对 THA 临床应用意义重大。 在骨科领域，全髋关节 ...

The protrusio cage should be mechanically stable ... Michael Ries of the University of California, San Francisco, reviewed his acetabular revision techniques and criteria for implant selection.