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Related Experiment Video

Updated: Oct 13, 2025

Intrathecal Application of a Fluorescent Dye for the Identification of Cerebrospinal Fluid Leaks in Cochlear Malformation
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Trochlear Dysplasia: When and How to Correct.

Edoardo Giovannetti de Sanctis1, Guillaume Mesnard1, David H Dejour1

  • 1Lyon-Ortho-Clinic, Clinique de la Sauvegarde, Ramsay Santé, 8, Avenue Ben Gourion, Lyon 69009, France.

Clinics in Sports Medicine
|November 16, 2021
PubMed
Summary

Sulcus deepening trochleoplasty effectively treats high-grade trochlear dysplasia and recurrent patellar dislocation. This surgical technique restores patellofemoral stability, though patients should be aware of potential residual pain or limited motion.

Keywords:
DeepeningDysplasiaPatellar dislocationSulcusTrochlearTrochleoplasty

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Area of Science:

  • Orthopedic Surgery
  • Biomechanical Engineering
  • Sports Medicine

Background:

  • High-grade trochlear dysplasia, characterized by a supratrochlear spur over 5 mm, is a significant cause of recurrent patellar dislocation and maltracking.
  • Patellofemoral instability significantly impacts patient quality of life and athletic function.

Purpose of the Study:

  • To evaluate the efficacy of sulcus deepening trochleoplasty in managing high-grade trochlear dysplasia with recurrent patellar instability.
  • To assess the impact of the procedure on patellofemoral joint reaction forces and patient outcomes.

Main Methods:

  • The study included patients with high-grade trochlear dysplasia (types B and D) and recurrent patellar dislocation.
  • Sulcus deepening trochleoplasty was performed, involving modification of the trochlear shape and proximal realignment of the tibial tubercle.
  • Post-operative outcomes, including patellofemoral stability, range of motion, and pain levels, were assessed.

Main Results:

  • Sulcus deepening trochleoplasty demonstrated high effectiveness in restoring patellofemoral stability.
  • The procedure successfully reduced patellofemoral joint reaction forces by decreasing trochlear prominence.
  • Patient satisfaction was high, although some experienced residual pain or limited range of motion.

Conclusions:

  • Sulcus deepening trochleoplasty is a highly effective surgical option for patients with severe trochlear dysplasia and recurrent patellar instability.
  • While generally successful, potential risks include persistent pain, limited range of motion, and the unpredictable development of patellofemoral osteoarthritis.