What is the appropriate management for a recurrent patellar dislocation?

Medical Advisory BoardAll articles are reviewed for accuracy by our Medical Advisory Board
Educational purpose only • Exercise caution as content is pending human review
Article Review Status
Submitted
Under Review
Approved

Last updated: October 5, 2026 • View editorial policy

Have a follow-up question?

Our Medical A.I. is used by practicing medical doctors at top research institutions around the world. Ask any follow up question and get world-class guideline-backed answers instantly.

Ask Question

Management of Recurrent Patellar Dislocation

For recurrent patellar dislocation, surgical intervention with medial patellofemoral ligament (MPFL) reconstruction is the primary treatment, combined with correction of underlying anatomical risk factors based on preoperative imaging assessment.

Critical Distinction: This is NOT Patellofemoral Pain

The evidence provided primarily addresses patellofemoral pain (PFP), which is fundamentally different from recurrent patellar dislocation. The guidelines on exercise therapy 1, 2 apply to pain syndromes, not structural instability with recurrent dislocations. Do not confuse these conditions—recurrent dislocation requires a completely different treatment paradigm focused on surgical stabilization.

Surgical Management Algorithm

Step 1: Comprehensive Preoperative Assessment

Identify anatomical risk factors through imaging 3, 4:

  • Trochlear dysplasia (assess trochlear morphology)
  • Patella alta (measure Insall-Salvati index)
  • Lateralized tibial tubercle (measure TT-TG distance)
  • Increased Q-angle
  • Valgus knee alignment
  • Chondral lesions (common finding)

Step 2: Core Surgical Intervention

MPFL reconstruction is the foundation for all recurrent patellar dislocation cases 3, 4, 5, 6:

  • Restores medial patellar restraint
  • Effective across all age groups
  • Prevents recurrent dislocations in most cases
  • Yields excellent outcomes with high return-to-sport rates 5
  • Use autologous semitendinosus tendon 7
  • Critical technical point: Honor the anatomy and avoid overconstraint 6

Step 3: Address Anatomical Risk Factors

For skeletally immature patients 4:

  • Patella alta: Tendon shortening procedures
  • Increased TT-TG distance: Grammont technique for medialization
  • Valgus knee: Growth modulation

For skeletally mature patients 3, 4:

  • Lateralized tibial tubercle OR patella alta: Tibial tubercle osteotomy with distalization and medialization
  • Severe valgus or rotational deformity: Femoral varus or rotational osteotomy
  • Trochlear dysplasia: Consider trochleoplasty after physeal closure

Step 4: Manage Chondral Lesions

Address based on size and symptoms 3:

  • Small lesions: Débridement
  • Larger lesions: Structural grafting or cell-based treatment

When MPFL Reconstruction Alone is Insufficient

MPFL reconstruction alone fails when significant anatomical risk factors are present 3. The challenge is that minimal evidence guides exactly when soft-tissue reconstruction suffices versus when bony correction is necessary. However, the presence of multiple risk factors (trochlear dysplasia, patella alta, lateralized tubercle) mandates combined procedures 3, 4.

Critical Pitfalls to Avoid

  1. Overconstraint of the patella during MPFL reconstruction leads to poor outcomes and potential cartilage damage 6
  2. Ignoring underlying bony anatomy when present—MPFL alone will fail 3
  3. Treating recurrent dislocation like patellofemoral pain with exercise therapy alone—this is inadequate for structural instability
  4. Operating on skeletally immature patients with physeal-violating procedures—use age-appropriate techniques 4

Expected Outcomes

  • Recurrence rate: Up to 35% with nonoperative treatment 5
  • MPFL reconstruction success: Prevents recurrent dislocations in most cases when anatomical risk factors are addressed 3, 5
  • Return to sport: High rates achievable with proper rehabilitation 5
  • Long-term concern: Progression to patellofemoral osteoarthritis if instability persists 3

Postoperative Rehabilitation

Focus on 5:

  • Pain and edema resolution
  • Motion restoration
  • Progressive hip and knee strengthening (isolated and multijoint exercises)
  • Achieve leg symmetry in strength measurements before return to sport
  • Use patient-reported outcome measures to assess stability perception

Role of Nonoperative Management

Nonoperative treatment is NOT recommended for recurrent patellar dislocation 5. While it may be considered for first-time dislocations, recurrence rates are unacceptably high (up to 35%), and surgical intervention becomes necessary 5, 6. The "common denominator" of patellar instability is medial restraint failure, which requires surgical reconstruction in the recurrent setting 6.

References

6
Research

Editorial Commentary: What Is the Optimal Management of First and Recurrent Patellar Instability? Patellofemoral Instability Management Continues to Evolve.

Arthroscopy : the journal of arthroscopic & related surgery : official publication of the Arthroscopy Association of North America and the International Arthroscopy Association, 2018

Related Questions

What is the recommended treatment for a patellar dislocation?
What is the appropriate treatment for patellar subluxation versus patellar dislocation?
What is the appropriate treatment for a possible lateral patellar subluxation in a 16-year-old whose alignment has improved over the past week?
In a 14-year-old with recurrent patellar dislocation, is using a DonJoy Playmaker or DryTech ROMSTOP brace locked at 0‑30° acceptable while awaiting MRI?
How should I explain patellar stabilization surgery to a patient with recurrent patellar instability and giving‑way episodes?
What is the recommended dosing, calcium and vitamin D supplementation, monitoring parameters, and contraindications for denosumab therapy in osteoporosis?
What procedure is used to perform balloon dilation of a biliary stricture?
In an adult patient with irritable bowel syndrome, how should mebeverine (Mebeverine) be initiated, monitored, and what are the contraindications such as pregnancy, lactation, severe hepatic impairment, or hypersensitivity?
Is nausea common during the third trimester of pregnancy?
Does a 7-year-old female need any follow-up care for trace ketones on three urinalyses, hemoglobin A1c of 4.8%, serum carbon dioxide of 25.3 mmol/L, and glucose of 86 mg/dL?
In a third‑trimester pregnant patient with new‑onset nausea, what additional symptoms should be screened for?

Professional Medical Disclaimer

This information is intended for healthcare professionals. Any medical decision-making should rely on clinical judgment and independently verified information. The content provided herein does not replace professional discretion and should be considered supplementary to established clinical guidelines. Healthcare providers should verify all information against primary literature and current practice standards before application in patient care. Dr.Oracle assumes no liability for clinical decisions based on this content.