JOURNAL CLUB · ARCHIVE
Abduction treatment in stable hip dysplasia does not alter acetabular growth
Pollet V, Castelein RM, van de Sande M, et al. Scientific Reports. 2020;10:9647. A multicentre randomised controlled trial.
WATCH,
DON'T BRACE
No benefit from bracing
No difference in acetabular index at 10 months between the harness and surveillance groups.
Most resolve on their own
About 80% of hips showed normal development within 12 weeks.
Observation is reasonable
The authors recommend observation rather than routine treatment for stable dysplastic hips.
Stable hips only
This is about stable dysplasia - not unstable (Ortolani / Barlow positive) or dislocated hips, which still need treatment.
WHY THIS MATTERS
- DDH is a common newborn-screening finding (breech, family history, unstable hips)
- Mild sonographic dysplasia is often picked up - and often treated
- Bracing has costs: monitoring, harness care, parental anxiety, small complication risk
- Whether to treat stable dysplasia or watch has long been debated
- Getting this right avoids overtreating babies who would resolve anyway
STRENGTHS
- Randomised, multicentre design
- Directly compares treatment vs observation for a common dilemma
- Objective imaging outcome (acetabular index)
- Addresses a real overtreatment question
- A clear, actionable message for stable dysplasia
LIMITATIONS
- Applies only to stable dysplasia - not unstable or dislocated hips
- Outcome at 10 months; longer-term hip development not the focus
- Sonographic classification and thresholds vary between centres
- It excludes the babies who most need treatment
- Local screening pathways and definitions differ
Practice implications
Developmental dysplasia of the hip is a routine part of the newborn check and follow-up - especially for breech babies and those with risk factors or an abnormal exam, who get a hip ultrasound. This trial addresses a common dilemma: what to do with a hip that is sonographically dysplastic but clinically stable. It found Pavlik harness treatment made no difference to acetabular development at 10 months, and about 80% normalised within 12 weeks - supporting observation over routine bracing for stable dysplasia. It does not change the management of unstable (Ortolani / Barlow positive) or dislocated hips, which still need referral and treatment. Follow your local orthopaedic pathway.
Which babies in your unit get a hip ultrasound, and when?
How do you distinguish a stable dysplastic hip from an unstable or dislocated one?
Does this change how you counsel parents when a mild dysplasia is found?
What are the harms of overtreating hips that would have resolved on their own?
Scientific Reports 2020 RCH MELBOURNE
DDH clinical guideline RADIOPAEDIA
DDH imaging GRAF METHOD
Ultrasound classification
Take-home message: Developmental dysplasia of the hip is common on newborn screening, and mild sonographic dysplasia is often treated. This multicentre RCT found that abduction (Pavlik harness) treatment of stable but sonographically dysplastic hips made no difference to acetabular development at 10 months, with about 80% normalising within 12 weeks - supporting observation over routine bracing for stable dysplasia. It does not change the management of unstable or dislocated hips, which still need treatment. A useful reminder to match the treatment to the hip, and to avoid overtreating those that would resolve.
For educational purposes only. Journal club appraisal - figures paraphrased from the published trial; read the full article for complete data. Always align practice to current local guidelines.