Related Experiment Video
Updated: Aug 10, 2025
Author Spotlight: A Novel 3D-Printed Titanium Implant for Minimally Invasive Treatment of Hip Dysplasia in Young Dogs
Published on: April 19, 2024
Acetabular Diameter Assessment and Three-Dimensional Simulation for Acetabular Reconstruction in Dysplastic Hips
Xi Chen1, Songlin Li2, Xingyu Liu3
1Department of Orthopedics, Orthopedic Research Institute, West China Hospital, West China School of Medicine, Sichuan University, Chengdu, China; Department of Orthopedic Surgery, Peking Union Medical College Hospital, Beijing, China; Department of Orthopedic Surgery, Peking Union Medical College Hospital, Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing, China.
Outer acetabular width better predicts hip replacement cup size in developmental dysplasia of the hip (DDH). Three-dimensional simulation is more accurate for severe deformities, particularly Crowe type IV.
Area of Science:
- Orthopedic surgery
- Biomedical engineering
- Radiology
Background:
- Developmental dysplasia of the hip (DDH) presents challenges in total hip arthroplasty (THA).
- Accurate pre-operative planning is crucial for successful THA in DDH patients.
Purpose of the Study:
- To evaluate the relationship between acetabular width measurements, 3D simulation, and surgical outcomes in THA for DDH.
- To compare the accuracy of 2D templating and 3D simulation in predicting implant size.
Main Methods:
- Retrospective analysis of 216 DDH cases undergoing THA.
- Measurement of inner and outer acetabular width (OAW).
- Comparison of 2D templating and 3D simulation accuracy for predicting cup size across Crowe classifications.
Main Results:
- Outer acetabular width (OAW) showed a smaller difference compared to inner acetabular width when predicting actual cup size.
- 3D simulation demonstrated significantly higher accuracy than 2D templating for Crowe type IV DDH.
- Augments and bone grafts were more frequently used in Crowe type II cases.
Conclusions:
- OAW is a more reliable predictor of actual cup size in THA for DDH than inner acetabular width.
- 3D simulation offers superior accuracy for predicting cup size in severe DDH, especially Crowe type IV, and is recommended for these cases.
- Attention to supero-lateral acetabular bone defects is necessary for type II cases.
