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337 Relationship of patellofemoral angles and tibiofemoral rotational angles with jumper’s knee in professional folk dancers: an MRI analysis
  1. Neslihan Aksu1,
  2. Vefa Atansay1,
  3. Isik Karalok2,
  4. Ayhan Nedim Kara1,
  5. Azmi Hamzaoglu3
  1. 1Demiroglu Bilim University Medical Faculty Florence Nightingale Hospital Orthopedics and Traumatology Department, Istanbul, Turkey
  2. 2Demiroglu Bilim University Medical Faculty Florence Nightingale Hospital Radiology Department, Istanbul, Turkey
  3. 3Istanbul Florence Nightingale Hospital Orthopedic and Spine Center, Istanbul, Turkey


Background Professional dancers learn splash and landing techniques throughout their careers starting in childhood and practice it very frequently like basketball, volleyball and soccer. Among the intrinsic factors, anatomical features of the lower extremity were the most studied in the literature.

Objective In this article, we investigated the relationship of tibiofemoral rotational angles and patellofemoral (PF) angles to the development of jumper’s knee in professional folk dancers.

Design Retrospective cohort MRI study.

Setting Professional folk dance group.

Patients (or Participants) 26 professional folk dancers (16 male, 10 female; mean age of 30.69±7.51 years (17 to 46)) group with complaints of knee pain.

Interventions (or Assessment of Risk Factors) PF sulcus angle and Femur-Insall angle were found to be related to Jumper’s knee.

Main Outcome Measurements We examined 26 dancers with complaints of knee pain, and 32 knees of them had magnetic resonance imaging (MRI). We detected 21 jumper’s knees. We measured patellofemoral angles (Patellofemoral sulcus angle, Lateral patellofemoral angle, Patellar tilt angle, Lateral trochlear-inclination angle, Lateral patellar tilt angle, The patellofemoral congruence angle) and tibiofemoral rotational angles (Condillary twist angles, posterior condillary angles, femur-Insall angles, tibia-Insall angles, posterior tibiofemoral angles, Whiteside-PFCL angles) and noted patellar specifics as alta, Baja, Wiberg on MRI’s with and without jumper’s knee to understand if there is any relationship with tendinopathy occurrence in this cohort study.

Results According to logistic regression analysis, PF sulcus angle was found to be related to quadriceps tendinopathy development (p<0,05, odd ratio (OR): 1,24, 95% confidential interval (CI ): 1,03–1,5) and patellar tendinopathy is found to be related to Femur-Insall angle (p<0,05, OR: 1,27, 95% CI: 1,00–1,61).

Conclusions The patellofemoral sulcus angle and patellar tendon rotation relative to the femur may be the effective anatomical variations in jumper’s knee occurence.

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