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

2023

Abstract2D images view hardly measurement points due to the overlap of anatomical features. This challenge is overcome by 3D modelling. In particular, images obtained by computed tomography are converted into 3D models through certain software. In sheep breeds with high polymorphism, some changes have occurred in their morphology due to both environmental and genetic factors. In this context, determining the osteometric measurements of sheep and revealing breed‐specific characteristics provide very important data for forensic, zooarchaeological, and developmental sciences. Mandibular reconstruction measurements are used to reveal differences between species and between sexes and for treatment and surgery in many fields of medicine. In the present study, morphometric characteristics were determined by 3D modelling from computed tomography images obtained from mandibles of Romanov ram and ewe. For this purpose, mandibles of 16 Romanov sheep (eight females and eight males) were used. They were scanned using a 64‐detector MDCT device at 80 kV, 200 MA, 639 mGY, and 0.625 mm slice thickness. CT scans were recorded in DICOM format. Reconstructions of the images were made using a special software program. Volume and surface area measurements were made with 22 osteometric parameters of the mandible. GOC‐ID had a statistically significant positive correlation with GOC‐ID, PC‐ID, GOC‐MTR, GOC‐PTW, GOC‐FMN, PMU, MDU, PDU, DU, GOV‐PC, GOV‐IMD, MTR‐MH, MO‐MH, FMN‐ ID, BM, MG, and CG (p < 0.01). GOC‐ID had a statistically significant correlation with MTR‐ID, GOV‐CR, PTW‐MH and SI (p < 0.05). When the CR‐PC measurement point was examined, it was observed that it had no statistically significant correlation with all measurement points (p > 0.05). As a result of the measurement, it was found that the volume and surface areas were higher in rams than in ewes. The morphometric data obtained would be a reference income in the fields of zoo‐archaeology, anatomy, forensics, anaesthesia, surgery, and treatment.

Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Morphometric analysis of the mandible of ram and ewe romanov sheep (Ovis aries) with 3D modelling: A CT study

Işbilir

2023

“…With the advancement of technology, besides bone morphometric measurements, CT and three‐dimensional modelling of bones are also performed (Berge & Goularas, 2010; Brenton et al, 2007; Freitas et al, 2011; Moselhy & Mahdy, 2019; Ohlerth & Scharf, 2007; Özkadif, 2015; Sukumar et al, 2012; Yilmaz et al, 2020; Yilmaz & Demircioğlu, 2019). Although there have been morphological (Yilmaz, 1998) and morphometric (Angelici et al, 2003; Corbet & Jones, 1965; Mohamed, 2011; Mori et al, 2019) studies on the porcupine skull, three‐dimensional modelling of the skull is performed for the first time with the present study.…”

Section: Discussionmentioning

confidence: 99%

“…In mammals, the mandible is mostly made of cortical bone and is physiologically equipped with teeth. The anatomy of the mandible is very important for both phylogenetic and biomechanical analyses (Szabelska et al, 2017; Yilmaz & Demircioğlu, 2019).…”

Section: Introductionmentioning

confidence: 99%

Evaluation of skull and mandible morphometric measurements and three‐dimensional modelling of computed tomographic images of porcupine (Hystrix cristata)

Baygeldi

Kanmaz

et al. 2022

Although there have been morphological and morphometric studies on the porcupine skull, three‐dimensional modelling of the skull is performed for the first time with the present study. In this study, it was aimed to model the skull and mandible of Hystrix cristata in 3D to reveal its morphometric values and the differences between the sexes. Morphometric analyses were performed on a total of eight (four male and four female) adult porcupine skulls and mandibles. Skulls and mandibles of porcupines were scanned usinf a 64‐detector MDCT (General Electric Revolution) device at 80 kV, 200 MA, 639 mGY and 0.625 mm slice thickness. Skull and mandible reconstructions were made with the help of MIMICS 20.1 (Materialize) software program and the surface area and volume values of the skull and mandible were calculated. Statistical analyses were carried out using SPSS 22.0 software. The longest measurement in the skulls, based on the metric measurement points, was the total length (TL), and it was measured as 135.4750 ± 0.54976 mm in males and 134.4725 ± 0.86681 mm in females (p < 0.5). The highest value was the foramen magnum index (p < 0.5), and the lowest value the was skull index (p < 0.1). While the total volume ratio of the mandibles was 29901.64 mm3 in males, it was 27296.20 mm3 in females (p > 0.5). Statistical differences in the morphometric values of skulls and mandibles of male and female porcupines were demonstrated for the first time using CT and three‐dimensional modelling software.

“…The 2D cross‐sectional images obtained can be transferred to the software in different file formats and three‐dimensional (3D) models can be created. Images of the anatomic structure that is desired to be examined by using various software can be examined, measured or divided (Demircioglu & Gezer, 2020; Freitas, Noritomi, & Silva, 2011; Özkadı̇f & Eken, 2015; Sergovich, Johnson, & Wilson, 2010; Yilmaz & Demircioglu, 2021). 2D conventional imaging methods have disadvantages such as magnification, superposition and minimization.…”

Section: Introductionmentioning

confidence: 99%

Investigating metacarpi of Hamdani sheep via different measurement and modelling methods: A methodological study

Koçyi̇ği̇t

Demircioğlu

et al. 2022

The aim of the study was to perform the morphometric analyses on metacarpi of Hamdani sheep via different measurement methods and to compare the methods. Thus, metacarpal bones of 15 females and 15 males were used in the study. Measurements were taken from the measurement points determined on metacarpus via four methods, and their statistical analyses were performed. When both male and female metacarpal bones were examined in the De parameter in the comparison with the methods, it was observed that the four measurement methods were different from one another (p < 0.01). When DEM and DEL measurement parameters were examined in male metacarpus, the highest value was measured in ImageJ and the smallest value was measured in 3D Slicer software; however, it was found that the statistical difference was not significant when compared numerically (p > 0.05). As a result, while it was observed that the measurements made by using digital calliper measurements, photometric analysis, and 3D software were similar in some of the parameters but there was no statistically significant difference; whereas, Statistical difference was detected in some parameters.