Is a Femoro-Acetabular Impingement Type Cam Predictable after Slipped Capital Femoral Epiphysis?

Wirries, Nils; Heinrich, Gesche; Derksen, Alexander; Budde, Stefan; Floerkemeier, Thilo; Windhagen, Henning

doi:10.3390/children8110992

Open AccessArticle

Is a Femoro-Acetabular Impingement Type Cam Predictable after Slipped Capital Femoral Epiphysis?

by

Nils Wirries

¹

,

Gesche Heinrich

¹,

Alexander Derksen

¹,

Stefan Budde

¹

,

Thilo Floerkemeier

² and

Henning Windhagen

^1,*

¹

Department of Orthopaedic Surgery at Diakovere Annastift, Hannover Medical School, 30625 Hannover, Germany

²

go:h Gelenkchirurgie-Orthopädie: Hannover, 30159 Hannover, Germany

^*

Author to whom correspondence should be addressed.

Children 2021, 8(11), 992; https://doi.org/10.3390/children8110992

Submission received: 26 September 2021 / Revised: 25 October 2021 / Accepted: 27 October 2021 / Published: 2 November 2021

(This article belongs to the Section Pediatric Orthopedics & Sports Medicine)

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Abstract

(1) Background: Previous studies have proven a high incidence of a femoro-acetabular impingement (FAI) type cam in patients sustaining a slipped capital femoral epiphysis (SCFE). Thus, the current study analyzed, if a cam deformity is predictable after SCFE treatment; (2) Methods: 113 cases of SCFE were treated between 1 January 2005 and 31 December 2017. The radiological assessment included the slip angle after surgery (referenced to the femoral neck (epiphyseal tilt) and shaft axis as Southwick angle) and the last available lateral center edge angle (LCEA), the acetabular- and alpha angle. A correlation was performed between these parameters and the last alpha angle to predict a FAI type cam; (3) Results: After a mean follow-up of 4.3 years (±1.9; 2.0–11.2), 48.5% of the patients showed a FAI type cam and 43.2% a dysplasia on the affected side. The correlation between the epiphyseal tilt and alpha angle was statically significant (p = 0.017) with a medium effect size of 0.28; (4) Conclusions: The postoperative posterior epiphyseal tilt was predictive factor to determine the alpha angle. However, the cut-off value of the slip angle was 16.8° for a later occurrence of a FAI type cam indicating a small range of acceptable deviations from the anatomical position for SCFE reconstruction.

Keywords: slipped capital femoral epiphysis; femoro-acetabular impingement; prognostic factor; correlation

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MDPI and ACS Style

Wirries, N.; Heinrich, G.; Derksen, A.; Budde, S.; Floerkemeier, T.; Windhagen, H. Is a Femoro-Acetabular Impingement Type Cam Predictable after Slipped Capital Femoral Epiphysis? Children 2021, 8, 992. https://doi.org/10.3390/children8110992

AMA Style

Wirries N, Heinrich G, Derksen A, Budde S, Floerkemeier T, Windhagen H. Is a Femoro-Acetabular Impingement Type Cam Predictable after Slipped Capital Femoral Epiphysis? Children. 2021; 8(11):992. https://doi.org/10.3390/children8110992

Chicago/Turabian Style

Wirries, Nils, Gesche Heinrich, Alexander Derksen, Stefan Budde, Thilo Floerkemeier, and Henning Windhagen. 2021. "Is a Femoro-Acetabular Impingement Type Cam Predictable after Slipped Capital Femoral Epiphysis?" Children 8, no. 11: 992. https://doi.org/10.3390/children8110992

APA Style

Wirries, N., Heinrich, G., Derksen, A., Budde, S., Floerkemeier, T., & Windhagen, H. (2021). Is a Femoro-Acetabular Impingement Type Cam Predictable after Slipped Capital Femoral Epiphysis? Children, 8(11), 992. https://doi.org/10.3390/children8110992

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Is a Femoro-Acetabular Impingement Type Cam Predictable after Slipped Capital Femoral Epiphysis?

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