Related Experiment Video
Updated: May 8, 2026
Surgical Technique of the 3-Dimensional-printed Personalized Hip Implant for the Treatment of Canine Hip Dysplasia
Published on: April 19, 2024
Effect of acetabular reinforcement ring with hook for acetabular dysplasia clarified by three-dimensional finite
Xin Zhao1, Etsuo Chosa, Go Yamako
1Department of Orthopaedic Surgery, Faculty of Medicine, University of Miyazaki, Kiyotake, Miyazaki, Japan.
Abstract:
The objective of this study was to biomechanically determine the effect of the severity of acetabular dysplasia, number and positions of screws and type of bone graft material used on the initial fixation strength of the acetabular reinforcement ring with hook (Ganz ring) using the finite element method. Relative micromotion increased as the severity of acetabular dysplasia increased and tended to decrease as the number of screws increased, but varied according to screw placement position. Increased strength of the bone graft material led to decreased relative micromotion. Biomechanically, the Ganz ring can be placed securely using 3 screws in patients with Crowe 1 dysplasia. However, in patients with Crowe 2 or higher dysplasia, it is necessary to spread at least 4 screws across an area of good host bone.
