Related Experiment Videos
Femoral anteversion in Perthes' disease with observations on irritable hips. Application of a new method using
Insights
Children with Perthes' disease exhibit higher femoral anteversion in affected hips. Both affected and unaffected hips show abnormal scatter, suggesting developmental issues in femoral torsion.
Area of Science:
- Pediatric Orthopedics
- Biomechanical Analysis
- Developmental Dysplasia
Background:
- Femoral anteversion (torsion) is a critical parameter in hip development and biomechanics.
- Abnormal femoral torsion is implicated in various pediatric hip conditions, including Perthes' disease and irritable hips.
- Accurate measurement of femoral anteversion is essential for understanding disease etiology and guiding treatment.
Purpose of the Study:
- To investigate femoral anteversion in children with unilateral Perthes' disease, previous irritable hips, and healthy controls using a novel ultrasound method.
- To compare femoral anteversion and its variability between affected, unaffected, and control hips.
- To explore potential developmental abnormalities in femoral torsion associated with these conditions.
Main Methods:
- Utilized a new ultrasound technique to measure femoral anteversion of both hips in three groups of children: unilateral Perthes' disease, previous irritable hips, and healthy controls.
- Performed statistical analysis to compare mean anteversion, scatter (variability), and asymmetry between the groups.
- Assessed right and left hips separately to identify limb-specific differences.
Main Results:
- Children with Perthes' disease showed significantly higher mean femoral anteversion in affected hips compared to controls.
- Both affected and unaffected hips in Perthes' disease exhibited significantly greater scatter in anteversion than normal hips.
- Femoral anteversion asymmetry was pronounced in Perthes' disease, with affected hips typically more anteverted; irritable hips displayed greater asymmetry, often with the affected femur less anteverted.
Conclusions:
- Perthes' disease is characterized by significant femoral anteversion asymmetry and increased variability, suggesting potential developmental contributions beyond the disease process itself.
- The unaffected contralateral hip in unilateral Perthes' disease also shows abnormal scatter, indicating a possible systemic developmental abnormality of femoral torsion.
- Findings may inform the understanding of Perthes' disease etiology, surgical interventions like femoral osteotomy, and patient prognosis.
Abstract:
A new ultrasound method was used to measure femoral anteversion (torsion) of both hips in children with unilateral Perthes' disease, children with previous irritable hips, and healthy children of a similar age. In children with Perthes' disease, the mean femoral anteversion of affected hips is significantly higher compared with normal controls. In the opposite hips, femoral anteversion for right and left hips separately is not significantly different from that of controls. The affected hips show a significantly greater scatter of anteversion than do normal hips, which could be secondary to the disease; but the opposite hips also show a significantly wider scatter of anteversion than do normal hips, which suggests a developmental abnormality of femoral torsion in the femur of the unaffected limb. In children with Perthes' disease, femoral anteversion asymmetry is characteristic, marked, and significantly different from that of normal hips, with the affected hips usually being the more anteverted (with two exceptions). Irritable hips show significantly greater femoral anteversion asymmetry than do normal hips, with the affected femur usually being less anteverted than the opposite femur. These observations may have relevance in Perthes' disease with respect to both etiology, femoral osteotomy, and prognosis.