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Öğe Determination of Bone Developments of Rat Anterior and Posterior Extremity Bones in Prenatal and Postnatal Period by Double Staining Method(Alanya Alaaddin Keykubat Üniversitesi, 2023) Öztürk, Mustafa; Unur, Erdoğan; Acer, Niyazi; Ertekin, Tolga; Alpa, Serife; Meker, Mesut; Tahta, YahyaAim: In our study, we aimed to determine the morphological development of the bones of the anterior and posterior extremity by staining the rat fetus and offspring skeletons with the double staining method. Method: In the current study, seven groups three prenatal (16th, 18th, and 20th days) and four postnatal (0th, 3th, 7th and 12th days) were formed from the foetuses and offsprings obtained from 13 pregnant rats. Then, it was stained with double staining method. Anterior and posterior extremity images of the fetuses and offsprings were examined under a stereo microscope, and ossification findings were determined. Total bone and ossification lengths as well as ossification areas were measured using the ImageJ software. Results: The first cartilage destruction in fetuses occurred on the 16th day of pregnancy in the clavicle, scapula, humerus, radius and ulna; It was seen in the femur, tibia and fibula on the 18th day of pregnancy. The first ossification centres were in the clavicle, scapula and humerus on the 18th day of pregnancy; It was seen in the radius, ulna, femur, tibia, fibula and 2-5 metatarsal bones on the 20th day of pregnancy. The secondary ossification centre was seen on the 0th day (birthday) in the scapula and humerus, on the 7th day after birth in the ulna and radius, and on the 12th day after birth in the femur and tibia. In the study, while the ossification rate in 20-day-old foetuses was 48.9% in the humerus, 53.2% in the radius, 55.7% in the ulna, 33.6% in the femur, 43.2% in the tibia, 44.3% in the fibula, it was determined that it reached 69.7% in the humerus, 78.4% in the radius, 73.3% in the ulna, 63.5% in the femur, 75.5% in the tibia, and 69.2% in the fibula on the 12th day after birth. Conclusion: In this study, we revealed the morphological changes of the anterior and posterior extremity bones of fetuses and offsprings in the normal developmental course. We think that these results will shed light on the studies to be conducted on the detection of skeletal anomalies in teratological studies and contribute to a more comprehensive evaluation of the findings to be obtained from the studies to be conducted.Öğe Determination of effects of chemical agencies on liver fibrosis models frequently used in different dose and time periots(2021) Kaan, Dilek; Toprak, Güler; Yay, Arzu; Başkol, Gülden; Ertekin, Tolga; Ülger, HarunAim: In this study, it was aimed to reveal a more effective model depending on the dose and time by evaluating histopathological properties and biochemical parameters, such as alanine aminotransferase (ALT), aspartate aminotransferase (AST), albumin, triglyceride, cholesterol in carbon tetrachloride and thioacetamide (CCl4 and TAA) models. Method: Rats were divided into three groups for each model and intraperitoneally (i.p.) injected with CCl4 (0.5 ml/kg, 1.0 ml/kg, 2.0 ml/kg) and TAA (100 mg/kg, 200 mg/ kg, 300 mg/kg) for 4, 6 and 8 weeks, three times weekly, respectively. Results: In the biochemical investigation, ALT and AST values in the only 0,5 ml CCL4 of groups for 6 and 8 weeks and were found to have significant differences compared to the control groups (p <0.05), while the other biochemicals parameters values did not reveal significant difference in the groups (p >0.05). According to the results of the histopathology in the liver tissues, both the control groups showed a normal histological feature. The hepatofibrotic alterations were remarkable in the CCl4 and TAA models fibrosis depending on the increasing dose and time in all of the groups. Conclusion: Our results showed that the dose and time were reached up to until the cirrhosis for eighth week. These results would be a helpful reference for hepatofibrotic studies.Öğe Hypertrophy of the transverse ligament caused by os odontoideum: a case report(2017) Avnioğlu, Seda; Köksal, Vaner; Ertekin, TolgaOs odontoideum is a small oval or round shaped bone fragment observed as the most common congenital anomaly of theodontoid process. Since it causes a slowly increasing mobility or instability in the atlanto-axial joint, sudden death, tetraplegia, chronic neck pain, headache, torticollis and myelopathy may develop. The spinal canal widens initially at the craniocervical junction and symptoms can occur at a very late stage. In this case, clinical complaints emerged after the age of 35.There was no other neurological finding and no history of recent trauma in this case presenting with severe neck pain. Thiscase report shows how ligaments, the supporting connective tissue elements, can be thickened to maintain stability whenthe stability of the cervical spine is impaired. Since it may cause sudden death even when asymptomatic, it is important torecognize this pathology and to distinguish os odontoideum from odontoid fractures in trauma patientsÖğe Stereological measurement of liver volume in newborn cadavers(2020) Avnioğlu, Seda; Unur, Erdoğan; Acer, Niyazi; Ertekin, Tolga; Doğaner, AdemPurpose: The aim of our study was to compare different techniques for the estimation of liver volume using cadaveric sample, magnetic resonance imaging (MRI) and ultrasonography (USG) images, and to measure errors associated with volume estimation techniques based on fluid displacement (the Archimedes' principle). Materials and Methods: Our study was formed of five newborn cadavers aged 39.7±1.5 weeks and weighted 2.220±1.056 g. We used three different methods for calculate the liver volume. Results: Liver volume (LV) measured by the Archimedes' principle was 70.00±49.96 cm3. There was no significant difference between the methods. Conclusion: MR and USG images provide easy, applicable and reproducible estimates in calculating volume of normal and anomalous liver with the Cavalieri’s principle. We think that our study may be a reference for similar studies to be done in the upcoming years.
