Anatomical and radiological evaluation of sigmoid notch morphometry

Authors : Fatma Yasemin Öksüzler, Mehdi Can, Mahmut Oksüzler, Sema Polat, Pınar Göker

Pages : 354-361

Doi:10.17826/cumj.1660309

View : 112 | Download : 165

Publication Date : 2025-06-30

Article Type : Research Paper

Abstract :Purpose: Knowing the morphological variations among the extremity bones is useful in understanding the pathogenesis, or underlying mechanism, and treatment of some disorders. This study aimed to evaluate sigmoid notch type, lunate type, sigmoid C-type depth, and ulnar variance concerning gender and age. Materials and Methods: This study included 252 subjects (88 females and 164 males) aged 18-68 years who underwent computed tomography. The mean age of the females was 46.59±14.67 years, while the mean age of the males was calculated as 43.11±14.08 years. Moreover, the sigmoid notch types were generated, and the sigmoid notch depth was measured. Lunate types and ulnar variance types were evaluated for both gender and age. Results: Sigmoid notch types showed a significant difference between genders, whereas no significant difference was found regarding lunate types, sigmoid C-type depth, and ulnar variance. The mean sigmoid C-type depth was 2.54±0.50 mm in females and 2.40±0.41 mm in males, respectively. Sigmoid notch types, ulnar variance presence and types, and lunate types significantly differed in age ranges. Conclusion: Comprehensive evaluation of the wrist region provides essential anatomical and morphological reference values that can inform clinical decision-making, particularly in the diagnosis and management of pathologies involving the distal radioulnar joint. Additionally, these values are critical for preoperative planning in reconstructive procedures and for addressing complex distal forearm fractures.
Keywords : Incisura sigmoideus, sigmoid derinlik, lunat tipleri, distal radioulnar eklem

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