Figure 8. (A) Fluoroscopic image of cross-section of magnesium rod in a guinea pig femur. E: endosteal bone formation; I: implant residual; P: periosteal bone formation. (B) Three-dimensional reconstruction of remaining AZ91D in the femur of a guinea pig. (C) Three-dimensional reconstruction of remaining LAE442 in the femur of a guinea pig. Scale bars: 1.5 mm. A-C were reprinted from Witte et al.^{39, 109} Copyright 2005 & 2006, with permission from Elsevier Ltd.