Assesment of Coracoid Inclination Angle and Coracoacromial Arch Angle on MRI in Rotator Cuff Tears

Abstract

Objective: The purpose of this study was to investigate the role of the coracoid inclination angle and the coracoacromial arch angle in the etiology of rotator cuff tears on magnetic resonance imaging.

Material and Methods: A total of 102 shoulder magnetic resonance imaging taken in our clinic between January 2014 and January 2019 were retrospectively evaluated. Supraspinatus tendon was evaluated for partial tear and full tear. The coracoid inclination angle and the coracoacromial arch angle were measured in all cases. Independent t test was used for comparisons between groups. Pearson correlation analysis was performed between the coracoid inclination angle and the coracoacromial arch angle.

Results: There were 29 female and 24 male patients in the rotator cuff tear group and the mean age was 49.5±11.3 years. There were 21 female and 28 male patients in the control group and the mean age was 45.08±11.7 years. In the rotator cuff tear group; the mean coracoid inclination angle was 92.8±8º and the mean coracoacromial arch angle was 127.4±7.3º. In the control group; the mean coracoid inclination angle was 106.5±9.5º and the mean coracoacromial arch angle was 122.4±5º. A statistically significant difference was found between the groups for both angle values (p <0.05).

Conclusion: The coracoid inclination angle was narrower and the coracoacromial arch angle was wider in rotator cuff tear cases. Coracoid process morphology and related variable coracoid inclination angle, coracoacromial arch angle may be the predisposing factors for rotator cuff tears and may be used to help determine the etiology of rotator cuff pathologies.

Keywords

• Coracoid,impingement syndrome,magnetic resonance imaging,rotator cuff

ROTATOR MANŞET YIRTIKLARINDA MRG İLE KORAKOİD İNKLİNASYON AÇISI VE KORAKOAKROMİAL ARK AÇISININ DEĞERLENDİRİLMESİ

Abstract

Amaç: Bu çalışmada, rotator manşet yırtıklarının etyolojisinde korakoid inklinasyon açısı ve korakoakromial ark açısının rolünün manyetik rezonans görüntüleme ile araştırılması amaçlandı.

Gereç ve Yöntemler: Çalışmada Ocak 2014-Ocak 2019 tarihleri arası kliniğimizde çekilmiş total 102 omuz manyetik rezonans görüntüleme retrospektif olarak değerlendirildi. Supraspinatus tendonu, parsiyel yırtık ve tam kat yırtık açısından değerlendirildi. Tüm olgularda korakoid inklinasyon açısı ve korakoakromial ark açısı ölçümü yapıldı. Gruplar arasındaki karşılaştırmalar için independent t testi kullanıldı. Ayrıca korakoid inklinasyon açı ve korakoakromial ark açısı arasında Pearson korelasyon analizi yapıldı.

Bulgular: Rotator manşet yırtık olan grupta 29 kadın, 24 erkek olup yaş ortalaması 49.5±11.3 yıl; kontrol grubunda 21 kadın, 28 erkek olup yaş ortalaması 45.08±11.7 yıldı. Rotator manşet yırtık olan grupta; korakoid inklinasyon açı ortalaması 92.8±8º, korakoakromial ark açı ortalaması 127.4±7.3º idi. Kontrol grubunda; korakoid inklinasyon açı ortalaması 106.5±9.5º, korakoakromial ark açı ortalaması 122.4±5º idi. Gruplar arasında her iki açı değeri için istatistiksel anlamlı farklılık tespit edildi (p <0.05).

Sonuç: Rotator manşet yırtık olgularında, korakoid inklinasyon açısı daha dar ve korako-akromial ark açısı daha genişti. Korakoid proçes morfolojisi ve buna bağlı değişken korakoid inklinasyon açısı, korakoakromial ark açısı rotator manşet yırtıkları için predispozan faktörler olabilir, rotator manşet patolojilerinin etyolojisini belirlemede yardımcı olarak kullanılabilir.

Keywords

• korakoid,impingement sendromu,manyetik rezonans görüntüleme,rotator manşet

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