Investigation of the effects of odontoid bone anatomical location and structure on cervical lordosis angle in cervical ct examinations: A clinical study

Abstract

Aim: In literature, anatomical variations of the odontoid process in the sagittal plane have been suggested to influence the magnitude of cervical lordosis. This study investigated the effects of odontoid process morphology on the degree of cervical lordosis. Material and Methods: This retrospective study included individuals who underwent cervical computed tomography (CT) scans and had no cervical vertebral disease. The age and gender of these individuals were recorded. Their CT images were analyzed for the morphologic relationships and morphologic measurements of the C2 vertebra and other cervical vertebrae in relation to their adjacent formations. Results: Thirty-five subjects (male=23, female=12) were included in the study. Correlation analysis revealed a positive correlation between C2-C7 Cobb angle and age, sagittal odontoid height, and sagittal C2 vertebral height values. In addition, positive correlations were found between sagittal C2-C7 height values and sagittal odontoid mid-thickness, sagittal odontoid base thickness, and C2 vertebral height values. Linear Regression analysis revealed that the T1 slope angle, sagittal C2 vertebral height, and sagittal C2-C7 height values could predict the C2-C7 Cobb angle. Conclusion: These findings suggest that cervical lordosis may decrease over time when the T1 slope angle, sagittal odontoid height, sagittal C2 vertebral height, and sagittal C2-C7 height are measured low, and thus, those individuals may be more exposed to cervical vertebral alignment disorders.

Keywords

• Odontoid process
• C2 vertebra
• cervical lordosis
• cobb angle

Servikal bt incelemelerinde odontoid kemik anatomik yerleşiminin ve yapısının servikal lordoz açısı üzerine olan etkilerinin araştırılması: Bir klinik araştırma

Abstract

Amaç: Literatürde, sagittal düzlemdeki odontoid çıkıntının anatomik varyasyonlarının servikal lordozun derecesini etkilediği öne sürülmüştür. Bu çalışmada odontoid çıkıntı morfolojisinin servikal lordoz derecesi üzerindeki etkileri araştırılmıştır. Gereç ve Yöntemler: Bu retrospektif çalışmaya servikal bilgisayarlı tomografi (BT) taramaları yapılan ve servikal disk hernisi, servikal dar kanal ya da servikal vertebra hastalığı olmayan bireyler dahil edilmiştir. Katılımcıların yaşları ve cinsiyetleri kaydedilmiştir. Ayrıca bireylerin servikal BT görüntülerinde C2 vertebra ve diğer servikal vertebraların kendi aralarında ve komşu oluşumlarla olan morfolojik ilişkileri ve ölçümleri analiz edilmiştir. Bulgular: Çalışmaya 35 birey (erkek=23, kadın=12) dahil edildi. Korelasyon analizi, C2-C7 Cobb açısı ile yaş, sagittal odontoid yüksekliği ve sagittal C2 vertebra yüksekliği değerleri arasında pozitif bir korelasyon olduğunu ortaya koydu. Ek olarak, sagittal düzlemde C2-C7 yükseklik değerleri ile sagittal düzlemde odontoid çıkıntı orta kalınlığı, sagittal düzlemde odontoid çıkıntı taban kalınlığı ve sagittal düzlemde C2 vertebra yüksekliği değerleri arasında pozitif korelasyon bulundu. Doğrusal Regresyon analizi, T1 eğim açısı, sagittal düzlemde C2 vertebral yüksekliği ve sagittal düzlemde C2-C7 yüksekliği değerlerinin C2-C7 Cobb açısını tahmin edebileceğini ortaya koydu. Sonuç: Bu bulgular, T1 eğim açısı, sagittal düzlemde odontoid çıkıntı yüksekliği, sagittal düzlemde C2 vertebra yüksekliği ve sagittal düzlemde C2-C7 yüksekliği düşük ölçüldüğünde servikal lordozun zamanla azalabileceğini ve dolayısıyla bu bireylerin servikal vertebral hizalama bozukluklarına daha fazla maruz kalabileceğini düşündürdü.

Keywords

• Odontoid çıkıntı
• C2 vertebra
• servikal lordoz
• cobb açısı

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