Bone Pins (image) Cell Press Share Print E-Mail Caption These images show bone pins. A. Pins made of sheep's long bones (Tibia and Femur) and B. pins made of dog's long bones (Tibia and Femur). Credit Nazhvani et al. Usage Restrictions Credit Required. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.