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Comparative study of the femoroacetabular impingement (FAI) prevalence in male semiprofessional and amateur soccer players.
Arch Orthop Trauma Surg 2014; 134(8):1135-41AO

Abstract

INTRODUCTION

Femoroacetabular impingement (FAI) represents a novel approach to the mechanical etiology of hip osteoarthritis. The cam-type femoroacetabular impingement deformity occurs frequently in young male athletes. The aim of our study was to evaluate the prevalence of FAI in male semiprofessional soccer players using clinical examination and magnetic resonance imaging (MRI), compared to amateur soccer players. In MRI, the α angle of Nötzli is determined for quantifying FAI.

MATERIALS AND METHODS

According to power analysis, a total of 22 asymptomatic semiprofessional soccer players with a median of 23.3 years of age (range 18-30 years) and 22 male amateur soccer players with a median of 22.5 years of age (control group, range 18-29 years) underwent an MRI to measure the hip α angle of Nötzli. The α angle of the kicking legs of the semiprofessional group and the amateur group were analyzed. The study group was moreover evaluated by the Hip Outcome Score (HOS) and a clinical hip examination including range of motion (ROM) and impingement tests.

RESULTS

In the semiprofessional group, 19 soccer players had a right kicking leg and 1 soccer player had a left kicking leg. 2 soccer players kicked with two feet. In the semi-professional group, the mean value of the α angle of the kicking leg (57.3 ± 8.2°) was significantly higher than in the amateur group (51.7 ± 4.8°, P = 0.008). In the semi-professional group, 15 (62.5 %) of 24 kicking legs had an increased α angle >55°, while 5 (27.3 %) kicking legs of the amateur group had an α angle >55°. Five semi professional soccer players had findings in clinical examination, whereof 4 had an increased α angle >55°. No participant of the amateur group showed pathological results in the clinical examination (P = 0.0484). Overall, semiprofessional soccer players had a higher proportion of an increased α angle than the amateur group.

CONCLUSIONS

Semiprofessional players have a higher prevalence of an increased α angle in the kicking leg than the amateur group at the same age. The kicking leg is predisposed for FAI.

Authors+Show Affiliations

Department of Orthopaedic Sports Surgery, St. Josef-Hospital, Ruhr-University Bochum, Gudrunstr. 56, 44791, Bochum, Germany, m.lahner@klinikum-bochum.de.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Comparative Study
Journal Article

Language

eng

PubMed ID

24858466

Citation

Lahner, Matthias, et al. "Comparative Study of the Femoroacetabular Impingement (FAI) Prevalence in Male Semiprofessional and Amateur Soccer Players." Archives of Orthopaedic and Trauma Surgery, vol. 134, no. 8, 2014, pp. 1135-41.
Lahner M, Walter PA, von Schulze Pellengahr C, et al. Comparative study of the femoroacetabular impingement (FAI) prevalence in male semiprofessional and amateur soccer players. Arch Orthop Trauma Surg. 2014;134(8):1135-41.
Lahner, M., Walter, P. A., von Schulze Pellengahr, C., Hagen, M., von Engelhardt, L. V., & Lukas, C. (2014). Comparative study of the femoroacetabular impingement (FAI) prevalence in male semiprofessional and amateur soccer players. Archives of Orthopaedic and Trauma Surgery, 134(8), pp. 1135-41. doi:10.1007/s00402-014-2008-6.
Lahner M, et al. Comparative Study of the Femoroacetabular Impingement (FAI) Prevalence in Male Semiprofessional and Amateur Soccer Players. Arch Orthop Trauma Surg. 2014;134(8):1135-41. PubMed PMID: 24858466.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Comparative study of the femoroacetabular impingement (FAI) prevalence in male semiprofessional and amateur soccer players. AU - Lahner,Matthias, AU - Walter,Philipp Alexander, AU - von Schulze Pellengahr,Christoph, AU - Hagen,Marco, AU - von Engelhardt,Lars Victor, AU - Lukas,Carsten, Y1 - 2014/05/25/ PY - 2013/11/15/received PY - 2014/5/27/entrez PY - 2014/5/27/pubmed PY - 2014/10/9/medline SP - 1135 EP - 41 JF - Archives of orthopaedic and trauma surgery JO - Arch Orthop Trauma Surg VL - 134 IS - 8 N2 - INTRODUCTION: Femoroacetabular impingement (FAI) represents a novel approach to the mechanical etiology of hip osteoarthritis. The cam-type femoroacetabular impingement deformity occurs frequently in young male athletes. The aim of our study was to evaluate the prevalence of FAI in male semiprofessional soccer players using clinical examination and magnetic resonance imaging (MRI), compared to amateur soccer players. In MRI, the α angle of Nötzli is determined for quantifying FAI. MATERIALS AND METHODS: According to power analysis, a total of 22 asymptomatic semiprofessional soccer players with a median of 23.3 years of age (range 18-30 years) and 22 male amateur soccer players with a median of 22.5 years of age (control group, range 18-29 years) underwent an MRI to measure the hip α angle of Nötzli. The α angle of the kicking legs of the semiprofessional group and the amateur group were analyzed. The study group was moreover evaluated by the Hip Outcome Score (HOS) and a clinical hip examination including range of motion (ROM) and impingement tests. RESULTS: In the semiprofessional group, 19 soccer players had a right kicking leg and 1 soccer player had a left kicking leg. 2 soccer players kicked with two feet. In the semi-professional group, the mean value of the α angle of the kicking leg (57.3 ± 8.2°) was significantly higher than in the amateur group (51.7 ± 4.8°, P = 0.008). In the semi-professional group, 15 (62.5 %) of 24 kicking legs had an increased α angle >55°, while 5 (27.3 %) kicking legs of the amateur group had an α angle >55°. Five semi professional soccer players had findings in clinical examination, whereof 4 had an increased α angle >55°. No participant of the amateur group showed pathological results in the clinical examination (P = 0.0484). Overall, semiprofessional soccer players had a higher proportion of an increased α angle than the amateur group. CONCLUSIONS: Semiprofessional players have a higher prevalence of an increased α angle in the kicking leg than the amateur group at the same age. The kicking leg is predisposed for FAI. SN - 1434-3916 UR - https://www.unboundmedicine.com/medline/citation/24858466/Comparative_study_of_the_femoroacetabular_impingement__FAI__prevalence_in_male_semiprofessional_and_amateur_soccer_players_ L2 - https://dx.doi.org/10.1007/s00402-014-2008-6 DB - PRIME DP - Unbound Medicine ER -