Related Experiment Video
Updated: Feb 6, 2026

Three-Dimensional Preoperative Virtual Planning in Derotational Proximal Femoral Osteotomy
Published on: February 17, 2023
Unilateral uniplanar modular external fixator for percutaneous proximal femoral osteotomy in children: surgical
Valentino Coppa1, Mario Marinelli2, Nicola Specchia3,2
1Clinical Orthopedics, Department of Clinical and Molecular Science, School of Medicine, Università Politecnica delle Marche, Via Tronto, 10/A, 60126, Ancona, Italy. coppa.valentino@gmail.com.
Insights
Varus derotation femoral osteotomy (VDFO) using a modular external fixator is presented for treating developmental hip dysplasia. This technique offers a viable alternative for proximal osteotomy fixation in pediatric hip dislocation cases.
Area of Science:
- Orthopedic Surgery
- Pediatric Orthopedics
- Biomedical Engineering
Background:
- Developmental hip dysplasia often requires surgical intervention, including pelvic osteotomy and femoral osteotomy.
- Varus derotation femoral osteotomy (VDFO) is a key procedure for hip dislocation in pediatric patients.
- Existing internal fixation methods for VDFO lack demonstrated superiority and have variable complication rates.
Observation:
- External fixators have shown promise for proximal osteotomy fixation in previous studies.
- A modular external fixator system can be adapted for VDFO procedures.
- This study details the surgical technique for VDFO utilizing a specific modular external fixator.
Findings:
- The described technique effectively utilizes a modular external fixator for VDFO.
- The case illustration demonstrates the application and potential benefits of this fixation method.
- No specific outcomes or complication rates are detailed in this technical description.
Implications:
- This modular external fixator technique provides an alternative fixation option for VDFO.
- Further research is needed to compare its efficacy and safety against existing methods.
- This approach may offer advantages in specific clinical scenarios for treating hip dysplasia.
Abstract:
Varus derotation femoral osteotomy (VDFO) is a commonly used surgical procedure in association with pelvic osteotomy for dislocated hip in developmental hip dysplasia. Several types of internal fixation devices were described in the literature, but none of them showed a superiority or a lower rate of complication over the others. Different types of external fixator were also described for proximal osteotomy fixation with good results. We describe the surgical technique of the VDFO using a modular external fixator with an illustrative case.
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