What type of splint or orthosis is recommended for managing recurrent hip dislocation?

Management of Recurrent Hip Dislocation

For recurrent hip dislocation, the recommended splint/orthosis depends critically on the patient population: in infants with developmental dysplasia of the hip (DDH), use a Pavlik harness as first-line treatment, while in adults with recurrent total hip arthroplasty (THA) dislocation, use a hip abduction brace that limits flexion and adduction for 6-9 months.

Pediatric Population (Developmental Dysplasia of the Hip)

Primary Orthosis Selection

For infants up to 6 months with hip instability or dislocation, the Pavlik harness is the gold standard treatment 1. The AAOS guidelines note that while limited evidence supports the von Rosen splint over the Pavlik, Craig, or Frejka splints, the Pavlik harness remains most widely recommended and has success rates of 67-83% 2.

Key implementation points:

• Most effective when applied before 6 weeks of age
• Can be used up to 6 months of age
• Efficacy decreases with advancing age 2

Alternative Pediatric Options

• Knee splint harness (KSH): Consists of posterior plastic shells at the knee preventing flexion beyond 90° while permitting full extension. In a study of 103 cases, achieved 100% reduction rate with no ischemic complications—subluxations reduced in 5.8 days, dislocations in 6.7 days 3

• Foam splinting: A 2025 randomized trial demonstrated superior satisfaction and fewer complications compared to spica casting after hip reconstruction surgery, making it the preferred post-operative immobilization method 4

Monitoring Protocol

During Pavlik harness treatment 2:

• Perform serial physical examinations
• Use ultrasound (not radiography) to confirm concentric hip reduction and assess treatment response
• Monitor for predictors of failure: low post-reduction alpha angle and <20% femoral head coverage

Adult Population (Post-Total Hip Arthroplasty)

Classification-Based Approach

The management depends on the Dorr classification of dislocation cause 5, 6:

Type I (Positional): Patient assumes positions exceeding mechanical stability

• Treatment: Hip abduction brace limiting flexion and adduction for 4-6 weeks initially 5
• If recurrent, extend to 6-9 months 7
• "Positional" classification is a risk factor for re-revision surgery 6

Type II (Soft tissue imbalance): Failed trochanter fixation or excessive femoral neck cut

• Initial treatment with brace
• If recurrent, consider surgical revision 5

Type III (Component malposition): Acetabular or femoral component errors

• Immediate revision surgery advisable if acetabulum malpositioned in two planes or severe femoral retroversion present 5

Specific Brace Designs

Short chair-back brace with lateral joint and thigh cuff 7:

• Lateral joint can be locked at specific positions
• Controls flexion, adduction, and rotation
• Light enough to wear under normal clothing
• Applied after second dislocation
• Worn for 6-9 months
• Excellent results in 9/10 patients in one series

Flexion reminder device 8:

• Lightweight alternative to bulky abduction braces
• Strapped to thigh with padded top end
• Hitches against groin crease beyond safe flexion limit
• Better compliance than traditional abduction braces
• One case report showed no dislocations over 2 years

Critical Pitfalls

• Do not use bracing alone if components are malpositioned—this requires revision surgery 5
• Recurrent dislocations (59% of cases have multiple dislocations) often require reoperation, with 28% needing revision 5
• Prolonged bedrest for treatment causes 40% complication rate—prefer bracing to allow mobility 5
• Component positions must be determined by radiographic analysis before deciding on conservative vs. surgical management 5

Special Considerations

Surgical alternatives when bracing fails:

• Socket wall addition devices (anti-luxation rings) show promising mid-term results with only 1/12 patients experiencing redislocation after mean 4.5 years 9
• Bone block techniques for native hip instability with bony deficiency show excellent long-term outcomes 10
• Conversion to constrained cup may be necessary for persistent instability 6

The 10-year survival rate after revision surgery for recurrent THA dislocation is 81.1%, emphasizing that proper initial orthosis selection and patient compliance are critical to avoid surgical intervention 6.