Hip Dysplasia in Newborns: Screening and Treatment
Abnormal hip ultrasound results? Learn about Graf classification, when Pavlik harness is needed, treatment duration and complete recovery chances.
Quick Answers
When is the newborn hip ultrasound performed?
What is the Pavlik harness?
Does hip dysplasia resolve completely?
Developmental dysplasia of the hip (DDH) covers a broad spectrum of abnormal hip development, ranging from a simply immature hip to an unstable hip and frank dislocation. Newborn screening is designed precisely to identify, early on, the cases that need a dedicated pathway: in general, the earlier the diagnosis, the simpler and less invasive the treatment. The pathway is based on clinical examination of the newborn (dedicated maneuvers at birth) and on hip ultrasound in the first months of life. Evaluation is particularly important in case of family history, breech presentation, oligohydramnios or evident asymmetries, but in many hospitals it is offered even without risk factors. Forms identified early respond in most cases to conservative treatment (e.g. Pavlik harness or other abduction devices). Forms diagnosed later or those frankly dislocated may require more structured pathways, up to reduction procedures and, in selected cases, joint remodeling surgery. The aim is not to create alarm — most screened newborns turn out to be normal — but to recognise, in time, the situations that deserve a dedicated pediatric orthopaedic pathway.
👶Early Screening: Why It Matters
Hip dysplasia corrects very well when identified early. With the Pavlik harness, over 90% of cases resolve without surgery.
When to seek evaluation
- Abnormal ultrasound screening (α < 60°)
- Asymmetric skin folds
- Limited hip abduction
- Click or clunk on Ortolani/Barlow maneuver
- Family history of hip dysplasia
- Breech presentation at birth
What is evaluated
- Ortolani and Barlow maneuvers in newborn
- Hip ultrasound according to Graf (α and β angles)
- Pelvis X-ray after 4 months
- Acetabular coverage evaluation
- Joint development follow-up
Treatment options
- Pavlik harness for early unstable forms (Type IIc, D)
- Rigid abduction braces (Milgram, Tübingen)
- Closed reduction under anesthesia for dislocations (Type III)
- Open surgical reduction in resistant cases (Type IV)
When Surgery Is Needed
Graf Ultrasound Classification
International classification used for staging hip dysplasia based on α and β angles measured by ultrasound.
Type I (Normal Hip)
α > 60°Mature and normal hip. Well-developed acetabular roof with adequate coverage of the femoral head.
Treatment: No treatment necessary. Routine clinical check.
Type IIa (Physiological Immaturity)
α 50-59°β < 77°Immature but maturing hip. Physiological in the first 3 months of life. After 3 months it becomes IIb (delayed maturation).
Treatment: Observation and ultrasound check at 4-6 weeks. Spontaneous maturation expected.
Type IIc (Critical Hip)
α 43-49°β < 77°Unstable hip at the edge of dysplasia. Requires close monitoring for risk of progression.
Treatment: Pavlik harness or abduction brace. Close ultrasound monitoring.
Type D (Decentered Hip)
α 43-49°β > 77°Insufficient bone roof with lateralized femoral head. Transition stage toward dislocation.
Treatment: Pavlik harness. If unresponsive, consider more aggressive approach.
Type III (Dislocated Hip)
α < 43°Frank dislocation. The femoral head is displaced with the cartilaginous rim shifted upward.
Treatment: Closed reduction under anesthesia + cast. If failed, open surgical reduction.
Type IV (Chronic Dislocation)
α < 43°Dislocation with rim interposed between head and acetabulum. Worse prognosis.
Treatment: Open surgical reduction necessary. Possible acetabular reconstructive procedures.
Frequently Asked Questions
When is the newborn hip ultrasound performed?▼
What is the Pavlik harness?▼
Does hip dysplasia resolve completely?▼
Is it the parents' fault if the newborn has dysplasia?▼
How should I hold or swaddle a newborn to protect the hips?▼
What happens after the harness? Are further check-ups needed?▼
Can a child treated for dysplasia play sports?▼
Important Notice: The information on this page is for educational and informational purposes only and does not constitute medical advice. Each clinical case is unique: the appropriate treatment is determined during the specialist consultation, based on a thorough clinical examination and, where necessary, diagnostic imaging. For any doubts or concerns, please consult a specialist.
Learn more
Related Articles

Hip Dysplasia: Abrupt Brace Discontinuation or Gradual Weaning? An RCT Quantifies a Daily Choice in DDH Management
Neonatal Hip Ultrasound: When to Do It, How It's Performed, and What the Report Means

Blount's Disease: Recent Literature Review and Treatment Strategies
Email: daniele.priano@ortopediaevolutiva.com
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