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Updated: Jul 13, 2026

In Vivo Quantification of Hip Arthrokinematics during Dynamic Weight-bearing Activities using Dual Fluoroscopy
Published on: July 2, 2021
[Etiopathogenesis of spastic hip pain and dislocation in children]
Marek Jóźwiak1, Piotr Harasymczuk, Aleksander Koch
1Katedra i Klinika Ortopedii i Traumatologii Dzieciecej, Akademia Medyczna im. Karola Marcinkowskiego w Poznaniu.
Insights
Hip pain is common in children with spastic cerebral palsy and dislocated hips. Degenerative cartilage lesions, especially on the anterior femoral head, are key risk factors for pain development.
Area of Science:
- Orthopedics
- Pediatric Medicine
- Biomedical Engineering
Context:
- Hip joint dislocation is a severe complication in children with spastic cerebral palsy.
- The natural history and pain development in these cases are not well understood.
Purpose:
- To determine the prevalence of hip pain in children with spastic cerebral palsy and dislocated hips.
- To investigate the correlation between degenerative cartilage changes and hip pain.
Summary:
- A study of 45 hips in 33 children with spastic cerebral palsy and dislocated hips found degenerative cartilage lesions in 33 hips.
- Pain was present in 75% of hips with degenerative lesions.
- Correlations were observed between anterior femoral head lesions, lesion size, femoral antetorsion, and pain intensity.
Impact:
- Identifies key risk factors for hip pain in this vulnerable pediatric population.
- Provides insights for clinical management and surgical planning.
- Highlights the need for further research into the pathophysiology of pain in pediatric hip dislocation.
Unlabelled:
The hip joint dislocation is one of the most serious complications associated with severe type of spastic cerebral palsy in children. The natural history of this secondary problem is poorly defined: how often and why the dislocated hip joint is going to be painful. The aim of our study was to specify prevalence of hip pain in the quadriplegic spastic type of cerebral palsy children with dislocated one or two hip joints. The next purpose was to establish correlation between cartilage degenerative changes and pain appearance.
Material And Method:
The clinical study population consisted of cerebral palsy children, who presented a unilateral or bilateral dislocation of the hip joint, operated in Department of Pediatric Orthopedics during the period 2002 through 2005. Performed surgical procedures allowed us to evaluate degenerative changes of femoral head cartilage. In 45 operated hips (33 patients) we discovered that 33 had degenerative cartilage lesions which in 25 cases (75%) were associated with pain appearance.
Results:
We observed correlation between anterior location of the femoral head lesion and pain appearance, between the size of the lesion and intensity of pain complaints and also between femoral antetorsion and magnitude of pain.
Conclusions:
Risk factors of pain appearance in spastic dislocated hip joint are degenerative lesions on anterior face of femoral head cartilage, age of the patient, large antetorsion angle and cartilage lesion bigger than 1/4 of femoral head surface.
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