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Acetabular cysts heal after successful periacetabular osteotomy
Yoshinari Nakamura1, Masatoshi Naito, Yuichiro Akiyoshi
1Department of Orthopaedic Surgery, Fukuoka University School of Medicine, Fukuoka, Japan. y.nakamura725@moon.email.ne.jp
Clinical Orthopaedics and Related Research
|August 15, 2006
Summary
Acetabular cysts do not negatively impact periacetabular osteotomy outcomes for hip dysplasia. Adequate surgical correction promotes cyst healing and improves hip function.
Area of Science:
- Orthopedic Surgery
- Hip Dysplasia Research
- Bone Cyst Investigation
Background:
- Subchondral bone cysts indicate articular cartilage defects and increased subchondral bone stress.
- Periacetabular osteotomy is a surgical treatment for hip dysplasia.
Purpose of the Study:
- To determine if acetabular cysts affect clinical and radiographic outcomes after periacetabular osteotomy.
- To evaluate the influence of preoperative acetabular cysts on surgical success in treating dysplastic hips.
Main Methods:
- Retrospective review of 46 hips (43 patients) undergoing periacetabular osteotomy for hip dysplasia.
- Comparison of clinical (Harris hip score) and radiographic (femoral head coverage) outcomes between hips with (n=21) and without (n=25) acetabular cysts.
- Follow-up averaged 5.8 years for the cyst group and 5.4 years for the control group.
Main Results:
- No significant differences in clinical outcomes (Harris hip score) between the cyst and control groups.
- No significant differences in radiographic evaluations at latest follow-up between the groups.
- In the cyst group, 17 of 21 hips showed complete or partial cyst healing post-surgery; 14 of these 17 achieved a 20-degree or greater increase in center-edge angle.
Conclusions:
- Preoperative acetabular cysts do not adversely affect the results of periacetabular osteotomy.
- Sufficient rotation of the acetabular fragment during surgery facilitates cyst remodeling and healing.
