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Erschienen in: International Orthopaedics 1/2018

21.07.2017 | Original Paper

Femoro-acetabular impingement: anatomic study of reliability and accuracy of alpha angle and offset ratio on fifty consecutive peri-operatively resected femoral heads

verfasst von: Štěpán Magersky, Adam Král, Radovan Kubeš

Erschienen in: International Orthopaedics | Ausgabe 1/2018

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Abstract

Purpose

The purpose of this study was to determine whether X-ray attributes of the femoro-acetabular impingement (FAI) – alpha angle (AA) and offset ratio (OR) reflect real measurements on resected femoral heads.

Methods

FAI AA and OR were assessed on 50 consecutively-resected femoral heads. The parameters were measured on heads cut through the maximum range of the deformity and compared to the same parameters on standardized X-ray projections (anterior-posterior [AP] and axial views).

Results

Mean AA was 76.47° on dissected heads vs. 75.81° on axial X-ray (p = 0.688). Mean OR was 0.132 on dissected heads vs. 0.220 on axial X-ray (p < 0.001). Mean AA on ideal AP X-ray was 79.46° vs. 81.51° on AP standing plain X-ray view (p = 0.431). AA measurements on plain X-ray AP and axial view of halved femoral heads correlated highly.

Conclusions

AA on axial X-ray view reflected the real AA in our series, but the risk of cartilage damage cannot be predicted.
Literatur
1.
Zurück zum Zitat Beck M, Kalhor M, Leunig M, Ganz R (2005) Hip morphology influences the pattern of damage to the acetabulum cartilage: femoroacetabular impingement as a cause of early osteoarthritis of the hip. J Bone Joint Surg Br 87:1012–1018CrossRefPubMed Beck M, Kalhor M, Leunig M, Ganz R (2005) Hip morphology influences the pattern of damage to the acetabulum cartilage: femoroacetabular impingement as a cause of early osteoarthritis of the hip. J Bone Joint Surg Br 87:1012–1018CrossRefPubMed
2.
Zurück zum Zitat Beualé PE, Zaragoza E, Motamedi K, Copelan E, Dorey FJ (2005) Three-dimensional CT of the hip in the assesment of fai. J Orthop Res 23:1286–1292CrossRef Beualé PE, Zaragoza E, Motamedi K, Copelan E, Dorey FJ (2005) Three-dimensional CT of the hip in the assesment of fai. J Orthop Res 23:1286–1292CrossRef
3.
Zurück zum Zitat Kang R, Yanke A, Orias A, Inoue N, Nho S (2013) Emerging ideas – novel 3-D quantification and classification of cam lesions in patients with Femoroaetabular impingement. Clin Orthop Relat Res 471:358–362CrossRefPubMed Kang R, Yanke A, Orias A, Inoue N, Nho S (2013) Emerging ideas – novel 3-D quantification and classification of cam lesions in patients with Femoroaetabular impingement. Clin Orthop Relat Res 471:358–362CrossRefPubMed
4.
Zurück zum Zitat Nepple J, Martel J, Kim Y, Zaltz I, Clohisy J, ANCHOR study group (2012) Do plain radiographs correlate with CT for imaging of cam-type femoroacetabular impingement? Clin Orthop Relat Res 470(p):3313–3320CrossRefPubMedPubMedCentral Nepple J, Martel J, Kim Y, Zaltz I, Clohisy J, ANCHOR study group (2012) Do plain radiographs correlate with CT for imaging of cam-type femoroacetabular impingement? Clin Orthop Relat Res 470(p):3313–3320CrossRefPubMedPubMedCentral
5.
Zurück zum Zitat Beaulé P, Hynes K, Parker G, Kemp K (2012) Can the alpha angle assessment of cam impingement predict acetabular cartilage delamination? Clin Orthop Relat Res 470(12):3361–3367; Symposium ABJS Carl T. Brighton workshop on hip preservation surgery. doi: 10.1007/s11999-012-2601-3 Beaulé P, Hynes K, Parker G, Kemp K (2012) Can the alpha angle assessment of cam impingement predict acetabular cartilage delamination? Clin Orthop Relat Res 470(12):3361–3367; Symposium ABJS Carl T. Brighton workshop on hip preservation surgery. doi: 10.​1007/​s11999-012-2601-3
6.
Zurück zum Zitat Monazzam S, Bomar J, Agashe M, Hosalkar H (2013) Does femoral rotation influence anteroposterior alpha angle, lateral center-edge angle, and medial proximal femoral angle? A pilot study. Clin Orthop Relat Res 471:1639–1645CrossRefPubMed Monazzam S, Bomar J, Agashe M, Hosalkar H (2013) Does femoral rotation influence anteroposterior alpha angle, lateral center-edge angle, and medial proximal femoral angle? A pilot study. Clin Orthop Relat Res 471:1639–1645CrossRefPubMed
7.
Zurück zum Zitat Maheshwari A, Malik A, Dorr L (2007) Impingement of the native hip joint. Current concepts review. J Bone Joint Surg Am 89:2508–2518PubMed Maheshwari A, Malik A, Dorr L (2007) Impingement of the native hip joint. Current concepts review. J Bone Joint Surg Am 89:2508–2518PubMed
8.
Zurück zum Zitat Eijer H, Leunig M, Mahomed N, Ganz R (2001) Cross-table lateral radiographs for screening of anterior femoral head-neck offset in patients with femoroacetabular impingement. Hip Int 11:37–41 Eijer H, Leunig M, Mahomed N, Ganz R (2001) Cross-table lateral radiographs for screening of anterior femoral head-neck offset in patients with femoroacetabular impingement. Hip Int 11:37–41
9.
Zurück zum Zitat Clohisy JC, McClure JT (2005) Treatment of aterior femoroacetabular impingement with combined hip arthroscopy and limited anterior decompression. Iowa Orthop J 25:164–171PubMedPubMedCentral Clohisy JC, McClure JT (2005) Treatment of aterior femoroacetabular impingement with combined hip arthroscopy and limited anterior decompression. Iowa Orthop J 25:164–171PubMedPubMedCentral
10.
Zurück zum Zitat Peelle MW, Della Rocca GJ, Maloney WJ, Curry MC, Clohisy JC (2005) Acetabular and femoral radiographic abnormalities associated with labral tears. Clin Orthop Relat Res 441:327–333CrossRefPubMed Peelle MW, Della Rocca GJ, Maloney WJ, Curry MC, Clohisy JC (2005) Acetabular and femoral radiographic abnormalities associated with labral tears. Clin Orthop Relat Res 441:327–333CrossRefPubMed
11.
Zurück zum Zitat Anderson LA, Peters CL, Park BB, Stoddard GJ, Erickson JA, Crim JR (2009) Acetabular cartilage delamination in femoroacetabular impingement: risk factors and magnetic resonance imagining diagnosis. J Bone Joint Surg Am 91:305–313CrossRefPubMed Anderson LA, Peters CL, Park BB, Stoddard GJ, Erickson JA, Crim JR (2009) Acetabular cartilage delamination in femoroacetabular impingement: risk factors and magnetic resonance imagining diagnosis. J Bone Joint Surg Am 91:305–313CrossRefPubMed
12.
Zurück zum Zitat Johnston TL, Schenker ML, Briggs KK, Philippon MJ (2008) Relationship between offset angle alpha and hip chondral injury in femoroacetabular impingement. Arthroscopy 24:669–675CrossRefPubMed Johnston TL, Schenker ML, Briggs KK, Philippon MJ (2008) Relationship between offset angle alpha and hip chondral injury in femoroacetabular impingement. Arthroscopy 24:669–675CrossRefPubMed
13.
Zurück zum Zitat Nepple J, Carlisle JC, Nunley RM, Clohisy JC (2011) Clinical and radiographic predictors of intra-articular hip disease in arthroscopy. Am J Sports Med 39:296–303CrossRefPubMed Nepple J, Carlisle JC, Nunley RM, Clohisy JC (2011) Clinical and radiographic predictors of intra-articular hip disease in arthroscopy. Am J Sports Med 39:296–303CrossRefPubMed
14.
Zurück zum Zitat Barton C, Salineros MJ, Rakhra KS, Beaule PE (2007) Validity of the alpha angle measurement on plain radiographs in the evaluation of cam-type femoroacetabular impingement. Clin Orthop Relat Res 469:464–469CrossRef Barton C, Salineros MJ, Rakhra KS, Beaule PE (2007) Validity of the alpha angle measurement on plain radiographs in the evaluation of cam-type femoroacetabular impingement. Clin Orthop Relat Res 469:464–469CrossRef
15.
Zurück zum Zitat Beaulé PE, LeDuff MJ, Zaragoza EJ (2007) Quality of life outcome of femoral head/neck offset correction for fai. J Bone Joint Surg Am 89:773–779PubMed Beaulé PE, LeDuff MJ, Zaragoza EJ (2007) Quality of life outcome of femoral head/neck offset correction for fai. J Bone Joint Surg Am 89:773–779PubMed
16.
Zurück zum Zitat Hack K, Diprimio G, Rakhra K, Beaule PE (2010) Prevalence of cam type FAI in asymptomatic volunteers. J Bone Joint Surg Am 92:2436–2444CrossRefPubMed Hack K, Diprimio G, Rakhra K, Beaule PE (2010) Prevalence of cam type FAI in asymptomatic volunteers. J Bone Joint Surg Am 92:2436–2444CrossRefPubMed
Metadaten
Titel
Femoro-acetabular impingement: anatomic study of reliability and accuracy of alpha angle and offset ratio on fifty consecutive peri-operatively resected femoral heads
verfasst von
Štěpán Magersky
Adam Král
Radovan Kubeš
Publikationsdatum
21.07.2017
Verlag
Springer Berlin Heidelberg
Erschienen in
International Orthopaedics / Ausgabe 1/2018
Print ISSN: 0341-2695
Elektronische ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-017-3572-5

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