Three-Dimensional reconstruction and morphometric analysis of the mandible in the Gazelle (Gazella subgutturosa): A CT study

Abstract

In this study, the anatomic, morphometric and volumetric properties of gazelle (Gazella subgutturosa) mandible were determined by using computer tomography (CT) and three-dimensional (3D) software program. For the study skull samples from 10 (5 males and 5 females) gazelles were used. Images of the skull samples were obtained by using a CT device at 80kV, 200 MA and 639 mGY in 0.625 mm tickness. Scanning images of each mandible were used for reconstruction of the 3D model of the mandibles by using a 3D software programme. Linear measurements at 22 points and the estimation analysis of surface area and volume of the mandibles were performed on the reconstructed models. All the parameters were expressed as mean±standard error of mean. Males showed higher values for surface area and volume than females. Mean mandible length (GOC-ID) and height (GOV-CR) were measured as 124.07±2.2 mm and 75,83±5.62 mm respectively. Furthermore significant differences between the sexes in the mandible width at the level of incisor teeth (SI) and width at the level of first molar teeth (BM) were found. The results of the study indicated that the data obtained would be used as reference values for evaluations in pathologic cases, taxonomy studies and surgical interventions on this region.

Keywords

• Computed tomography,gazelle,mandible,morphometry,reconstruction

Ceylanlarda (Gazella subgutturosa) Mandibulanın Üç Boyutlu Rekonstrüksiyonu ve Morfometrik Yapısı: Bir BT Çalışması

Abstract

Bu çalışmada ceylan (Gazella subgutturosa) mandibula’sının anatomik, morfometrik ve volümetrik özellikleri bilgisayarlı tomografi (BT) ve üç boyutlu (3D) yazılım programı kullanılarak tespit edildi. Bu amaçla 10 adet (5 erkek, 5 dişi) ceylan kafası kullanıldı. Kafaların 64 dedektörlü BT cihazında 80 kv, 200 MA, 639 mGY ve 0.625 mm kesit kalınlığında görüntüleri alındı. Her bir deneğin mandibulaya ait tarama görüntüleri özel bir 3D yazılım programı yardımıyla üç boyutlu modellere dönüştürülerek rekonstrükte edildi. Modeller üzerinde mandibulanın yüzey, hacim ve doğrusal ölçüm (22 adet) analizleri yapıldı. İncelenen tüm özellikler ortalama ± SD olarak ifade edildi. Yapılan incelemelerde, erkeklerde mandibulanın hacim ve yüzey alanı değerlerinin dişilerden daha büyük olduğu tespit edildi. Mandibula uzunluğu (GOC-ID) 124.07±2.2 mm, yüksekliği (GOV-CR) ise 75,83±5.62 mm olarak belirlendi. Morfometrik değerlendirmelerde dişi ve erkekler arasında GOV-CR, SI (son incisiv diş seviyesinde mandibula genişliği) ve BM (birinci molar diş seviyesinde mandibular boşluğun genişliği) parametrelerinde istatistiksel olarak anlamlı farklar gözlendi. Elde edilen morfometrik verilerin, patolojik durumlar, taksonomi çalışmaları ve bölge üzerinde yapılacak girişimsel cerrahi tedavi uygulamalarında referans olacağı düşünülmektedir.

Keywords

• Ceylan,bilgisayarlı tomografi,mandibula,morfometri,rekonstrüksiyon

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