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Anatomic Magnetic Resonance Imaging Measurements in First-Time Patellar Dislocators by Sex and Age.

Publication ,  Journal Article
Grimm, NL; Wooster, BM; Tainter, DM; Kildow, BJ; Kim, J; Taylor, DC
Published in: J Athl Train
August 2019

CONTEXT: Anatomic differences of the knee in first-time patellar dislocators have not been clearly elucidated. OBJECTIVE: To compare structural differences of the knee in those who have sustained an acute first-time patellar dislocation resulting in a medial patellofemoral ligament (MPFL) tear by sex and age (≤17 years old, ≥18 years old). DESIGN: Case series. SETTING: Retrospective magnetic resonance imaging analysis. PATIENTS OR OTHER PARTICIPANTS: Thirty-five acute first-time patellar dislocators with an associated MPFL tear. MAIN OUTCOME MEASURE(S): Patellar height using 3 methods, patellar alignment using congruency angles, and trochlear morphology using the sulcus angle. We compared the means of these variables by sex and age. The intraclass correlation coefficient was then calculated to assess the agreement of the independent reviewers. RESULTS: A total of 21 left and 14 right knees were analyzed. The MPFL tear location did not differ by sex (P = .34) or age (P = .43). Patellar height did not differ as measured by the Caton-Deschamps ratio (P = .29 for sex, P = .49 for age), Insall-Salvati index (P = .15 for sex, P = .33 for age), or patellotrochlear index (P = .67 for sex, P = .49 for age). The congruence angle (P = .81 for sex, P = .06 for age) and trochlear morphology as measured by the sulcus angle (P = .64 for sex, P = .45 for age) were similar between groups. CONCLUSIONS: Patellar height and trochlear morphology did not differ by sex or age among patients whose first-time patellar dislocations resulted in an MPFL tear. In addition, the location of the tear did not appear to vary by sex or age.

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Published In

J Athl Train

DOI

EISSN

1938-162X

Publication Date

August 2019

Volume

54

Issue

8

Start / End Page

901 / 905

Location

United States

Related Subject Headings

  • Young Adult
  • Sport Sciences
  • Sex Factors
  • Rupture
  • Retrospective Studies
  • Patellofemoral Joint
  • Patellar Dislocation
  • Patella
  • Male
  • Magnetic Resonance Imaging
 

Citation

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ICMJE
MLA
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Grimm, N. L., Wooster, B. M., Tainter, D. M., Kildow, B. J., Kim, J., & Taylor, D. C. (2019). Anatomic Magnetic Resonance Imaging Measurements in First-Time Patellar Dislocators by Sex and Age. J Athl Train, 54(8), 901–905. https://doi.org/10.4085/1062-6050-280-18
Grimm, Nathan L., Benjamin M. Wooster, David M. Tainter, Beau J. Kildow, Jaewhan Kim, and Dean C. Taylor. “Anatomic Magnetic Resonance Imaging Measurements in First-Time Patellar Dislocators by Sex and Age.J Athl Train 54, no. 8 (August 2019): 901–5. https://doi.org/10.4085/1062-6050-280-18.
Grimm NL, Wooster BM, Tainter DM, Kildow BJ, Kim J, Taylor DC. Anatomic Magnetic Resonance Imaging Measurements in First-Time Patellar Dislocators by Sex and Age. J Athl Train. 2019 Aug;54(8):901–5.
Grimm, Nathan L., et al. “Anatomic Magnetic Resonance Imaging Measurements in First-Time Patellar Dislocators by Sex and Age.J Athl Train, vol. 54, no. 8, Aug. 2019, pp. 901–05. Pubmed, doi:10.4085/1062-6050-280-18.
Grimm NL, Wooster BM, Tainter DM, Kildow BJ, Kim J, Taylor DC. Anatomic Magnetic Resonance Imaging Measurements in First-Time Patellar Dislocators by Sex and Age. J Athl Train. 2019 Aug;54(8):901–905.

Published In

J Athl Train

DOI

EISSN

1938-162X

Publication Date

August 2019

Volume

54

Issue

8

Start / End Page

901 / 905

Location

United States

Related Subject Headings

  • Young Adult
  • Sport Sciences
  • Sex Factors
  • Rupture
  • Retrospective Studies
  • Patellofemoral Joint
  • Patellar Dislocation
  • Patella
  • Male
  • Magnetic Resonance Imaging