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    An evaluation on the morphology of the nasal bone, piriform aperture, and choana on dry skulls
    (Wolters Kluwer Medknow Publications, 2020) Kabakci, Anil Didem; Saygin, Duygu Akin; Alpa, Serife; Buyukmumcu, Mustafa; Yilmaz, Mehmet Tugrul
    Introduction: Piriform aperture (PA) and nasal bone (NBs) are important structures that contribute to the formation of the nose. Both anatomic structures show differences based on ethnicity, gender, and age. Hence, it is widely used to determine sex in science branches such as anthropology and forensic medicine. Furthermore, morphometry of the PA and choana is an important criterion for physiological nasal respiration of individuals. Recognition of structural differences of PA, NB, and choana along with all this information becomes important during maxillofacial procedures to be performed especially in plastic and reconstructive surgery. The aim of the present study is to determine the individual differences in NBs, PA, and choana. Material and Methods: This study was conducted on 83 Turkish dried skulls and PA, NBs, and choana was examined as morphometrically. PA was classified into seven types and NB was classified into eight subtypes. Results: The most common type of PA was found type 5 (20%-24.1%) and the least most common type of PA was type 7 (4%-4.8%). Type 1 was determined as the most common observed shape of the NB. The mean width of the choana on the right and left sides was found 13.21 +/- 1.4 and 13.98 +/- 1.81 mm, respectively. Moreover, the mean height of the choana on the right and left sides was found 25.56 +/- 3.06 and 26.1 +/- 2.5 mm, respectively. Discussion and Conclusion: We believe that obtained data from our study will constitute a morphometric data set and will be useful in a wide range of fields from forensic science to reconstructive surgery.
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    Internal Acoustic Opening: Different Osseous Landmarks and their Clinical Implications
    (Soc Chilena Anatomia, 2022) Saygin, Duygu Akin; Turkoglu, Fatma Nur; Kabakci, Anil Didem Aydin; Alpa, Serife
    Internal acoustic opening is a space that opens to facies posterior of the petrous piece of temporal bone that goes inside facial nerve, vestibulocochlear nerve, intermedial nevre and labyrinthine artery. The purpose of this study is the assessment of internal acoustic opening from a morphometric perspective, determination of the shape of the hole and determination of the distance to some important anatomic formations. This study is conducted on 166 temporal bones with unknown sex formation which arc part of the skull collection in NEU and KTO Karatay University, Anatomy Department. In this study, the vertical and diameter of internal acoustic meatus, its distance to the bottom and top sides of posterior surface of the petrous part, its distance to groove for superior sagittal sinus and its distance to apex were measured. Moreover, in this study internal acoustic opening spaces are categorized into six groups as round, oval, U-shaped, fissure, irregular and V shape. Digital caliper was used for internal acoustic meatus measurements. While the vertical horizontal diameters and distance to groove for superior sagittal sinus of internal acoustic opening on the right side are 4.12 mm, 6.83 mm and 19.64mm respectively, they are 4.56 mm, 7.10 mm and 21.06 mm on the left side respectively. We have observed in this study, 37.3 % of the internal acoustic opening as round, 34.3 % as oval, 6.6 % as U-shaped, 6.6 % as fissure, 12.7 % as irregular and 2.4 % as V-shaped. We believe that these measurements can provide guidance and help in surgical procedures
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    Typing and Morphometric Analysis of the Pterion on Human Skull of Central Anatolia
    (Wolters Kluwer Medknow Publications, 2022) Saygin, Duygu Akin; Kabakci, Anil Didem Aydin; Alpa, Serife; Buyukmumcu, Mustafa; Yilmaz, Mehmet Tugrul
    Introduction: Pterion is seen in the norma lateralis of the skull and is shaped like the letter H. Pterional approach such as retro-orbital, sellar, sub-frontal, replate areas, anterior circulation, and olfactory meningiomas, tumors involving downstream of the frontal lobe such as the orbital, basilar artery aneurysm is a commonly preferred surgical approach. The present study focused on the typing of the pterion and morphometric measurements between the pterion and surrounding important anatomic spots. Material and Methods: The present study was performed with pterion typing of 107 skull (a total of 214 sides including the right and left sides) within Anatomy Laboratories of Necmettin Erbakan University, Meram Faculty of Medicine, and KTO Karatay University, Medicine Faculty. Distance between the pterion and some important (mid-point of the superior edge of the zygomatic arch, the anterior and posterior edge of the frontozygomatic suture, the tip of the mastoid process, and anterosuperior edge of suprameatal spine and asterion) spots were measured through a digital caliper in millimeter. In addition to the classification made by Murphy, three different classifications were made. The pterion was classified into seven types. Results: The rates of the types were sphenoparietal type by 55.60%, epipteric type by 3.73%, stellate type by 2.33%, frontotemporal type by 0.4%, wormian type by 5.14%, frontoparietal type by 8.87%, and frontoparietal sphenoidtype by 23.83%. Discussion and Conclusion: Morphometric characteristics of the pterion were detected in detail by the present study. Moreover, the knowledge of typing would serve as an important guide for surgical planning and procedures and may contribute to further anthropological studies. This study is aimed at the Central Anatolia population and can be conducted among other populations.