ANATOMICAL ARCHITECTURE AND ANGULATIONS OF THE PROXIMAL ULNA

Abstract

Objective We aimed to get morphometric data of the proximal ulna, besides torsion angle, which is rarely found in the literature. Materials and Methods In this study, 25 ulna (11 left, 14 right) found in the Anatomy Department laboratory were used. Eight morphometric parameters of the proximal ulna were measured. All dry bones were photographed using a ruler and transferred to the computer. Then, morphometric measurements were made with the help of Image-J analysis program. Results In our measurement we noted that the mean ulna length was 251.02 ± 16.23 mm and the mean ulna length except trochlear notch was 223.49 ± 15.52 mm. The mean radial notch width was 18.5 ± 3.38 mm, the mean radial notch height was 12.09 ± 1.70 mm, and the mean trochlear notch depth was 11.57 ± 1.73 mm. Mean torsion angle, dorsal angulation and varus angle were calculated respectively; 14.64 ± 8.36º; 5.94º ± 2.01º; 12.48º ± 2.425º. There was no statistically significant difference in any parameter in the comparison between the sides. Conclusion The anatomical shape of the proximal ulna causes specific difficulties for implants used in humeroulnar arthroplasty. The fact that there is no difference between the right and left sides in all parameters in this study suggests that the knowledge of the opposite side ulna can be used in the appropriate prosthesis design. In addition, the results of this study will provide data on ulna dimensions in forensic and anthropological studies.

Keywords

• Ulna
• Morphometry
• Torsion angulation
• Varus angulation
• Dorsal angulation

PROKSİMAL ULNA’NIN ANATOMİK MİMARİSİ VE AÇILANMALARI

Abstract

Amaç Literatürde az yer alan torsiyon açısı da dahil olmak üzere proksimal ulna’ya ait diğer bazı morfometrik verilerin elde edilmesi amaçlandı. Gereç ve Yöntem Bu çalışmada Anatomi Ana Bilim Dalı laboratuvarında bulunan 25 ulna (11 sol, 14 sağ) kullanıldı. Proksimal ulna'ya ait 8 morfometrik parametre ölçüldü. Tüm kuru kemikler bir cetvel eşliğinde fotoğraflandı ve bilgisayara aktarıldı. Daha sonra Image-J analiz programı yardımıyla morfometrik ölçümler yapıldı. Bulgular Ortalama ulna uzunluğu 251,02±16.23 mm ve ortalama incisura trochlearis hariç ulna uzunluğu 223,49±15.52 mm bulundu. Ortalama incisura radialis genişliği 18,5±3.38 mm, ortalama incisura radialis yüksekliği 12,09±1.70 mm ve ortalama incisura trochlearis derinliği 11,57±1.73 mm bulundu. Ortalama torsiyon açısı, dorsal açılanma ve varus açısı sırasıyla 14,64º±8.36º; 5,94º±2.01º; 12,48º±2.425º olarak hesaplandı. Hiçbir parametrede taraflar arası karşılaştırmada istatistiksel olarak anlamlı fark bulunmadı. Sonuç Proksimal ulna’nın anatomik şekli, humeroulnar artroplastide kullanılan implantlar için özel zorluklar oluşturmaktadır. Bu çalışmadaki tüm parametrelerde sağ ve sol taraflar arasında fark olmaması, uygun protez tasarımında karşı taraf ulna’nın bilgisinden yararlanılabileceğini düşündürmektedir. Ayrıca bu çalışmanın sonuçları, adli ve antropolojik araştırmalarda ulna boyutlarına ilişkin veriler sağlayacaktır.

Keywords

• Ulna
• Morfometri
• Torsiyon açılanması
• Varus açılanması
• Dorsal açılanma

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