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Öğe Dental age assessment: The applicability of Demirjian method in southwestern of eastern Anatolia region Turkish children(2012) Karataş O.H.; Öztürk F.; Dedeo?lu N.; Çolak C.; Altun O.Objectives: Age estimation plays an important role in forensic medicine and orthodontics. Many methods of age estimation have been suggested. Demirjian method is the most frequently used one of these. In the literature, there is a little known about applicability of this method in Turkish children. The aim of the present study was to evaluate the reliability of Demirjian method of dental age estimaiton and for description of mandibular permanent tooth formation in Turkish children from the southwest Eastern Anatolia region. Materials and Methods: A retrospective study was performed on 1015 panoramic radiographs and 5-15 years of age South western of Eastern Anatolia Regionof Turkish children. The stages of dental maturity of the mandibular left seven permanent teeth for each subject using the eight radiographic dental maturity stages demonstrated by Demirjian's method were evaluated. A pired t-test was used for statistical analysis. Results: The mean difference between the chronological and dental ages ranged 0,28 to 1,10 years in boys and from 0,18 to 0,68 years in girls. South western of Eastern Anatolia Region of/Turkish children were generally delayed in dental maturity compared with children in Demirjian sample. The differences between the chronological and dental ages were statistically significant in 6-6.9, 8-8.9, 9-9.9, 10-10.9, 11-11.9 years in boys and in 8-8.9, 9-9.9,11-11.9 years in girls. Conclusions: Turkish children from the southwest Eastern Anatolia region are significantly more delayed in dental maturity compared to Demirjian's French-Canadian sample. The applicability of Demirjian data is not suitable for Southwestern of Eastern Anatolia Region of Turkish children.Öğe The effect of chronic alcohol consumption on pancreas mast cells of rats(2002) Vardi N.; Otlu A.; Öztürk F.Purpose: In this study the effect of chronic alcohol consumption on pancreas mast cells of rats was investigated at light microscopic levels. Material and Methods: The study was performed on male Wistar albino rats. The experimental group was fed with a modified liquid diet (MLD) containing 7.2 % ethanol for 2,4 and 6 months. Control rats were fed on isocaloric MLD with no ethanol. At the end of the experimental feeding period, samples were fixed in Bouin solution. The sections were stained with Heamatoxylen-Eosin and Toluidin Blue methods. Results: This study revealed that the number of mast cells was significantly reduced in the alcoholic group when compared with the control group. Mast cells also showed degranulation in the experimental group. Conclusion: We conclude that alcohol induced the secretion of mast cell mediators in the pancreas of the alcohol fed rats.Öğe The effects of nitric oxide on rat stomach injury induced by acetylsalicylic acid(2009) Ya?murca M.; Uçar M.; Fadillio?lu E.; Erdo?an H.; Öztürk F.Aim: Acetylsalicylic acid (ASA, aspirin), which is one of the most frequently used drugs in the world, causes severe gastric mucosal injury. Nitric oxide (NO) is synthesized from L-arginine by nitric oxide synthase (NOS). NOS can be inhibited by N?-nitro-L-arginine methyl ester (L-NAME) and stimulated by supplementing the diet with L-arginine (L-Arg). The aim of this study was to investigate the role of NO on gastric mucosal injury induced by ASA. Materials and Methods: Male Sprague-Dawley rats were divided into seven groups: control, ASA, ASA+L-NAME, ASA+L-Arg, ASA+L-Arg+L-NAME, only L-NAME, and only L-Arg groups. After administration of the drugs, the rats were decapitated and their stomachs were removed and fixed in 10% neutral-buffered formalin solution. Results: Mucosal erosion, intramucosal hemorrhage, inflammatory cell infiltration, gland cell detachment, and necrosis were observed in the ASA group. It was demonstrated that L-Arg administration decreased the gastric mucosal injury, whereas L-NAME administration increased the extent and severity of the gastric injury induced by ASA. L-Arg or L-NAME administration alone did not affect gastric mucosa. Conclusions: We concluded that NO may have protective effects on gastric mucosal injury induced by ASA. © TÜBITAK.Öğe The effects of orthodontic malocclusions and treatments on airway dimensions, tongue and hyoid bone position(Cumhuriyet University Faculty of Dentistry, 2014) Iça B.; Öztürk F.Tongue and hyoid bone position, due to the muscle attachments surrounding them and the airway dimensions, depending on the structures that surround them are affected by the relationship of the maxilla and mandible. The malocclusions that influence the relationship between maxilla and mandible and the treatments of these malocclusions can change the airway dimensions, tongue and hyoid bone positions. In this article, we will summarize how and to what extent that these structures are affected by various malocclusions and from the treatments of these malocclusions.Öğe Evaluation of treatment results after nasoalveolar molding and surgery using 3-dimensional image technique: A case report(Cumhuriyet University Faculty of Dentistry, 2014) Toy E.; Altindis S.; Öztürk F.; Aytekin A.H.Cleft lip and palate is the most common congenital anomaly in facial structures. In our country, this anomaly was encountered 1/800 ratio. Pre-operative orthopedic therapy is widely applied to the individuals with cleft lip and palate. The aim of this case report is to evaluate the treatment results of an infant with bilateral cleft lip and palate in terms of changes obtained after preoperative nasoalveolar molding and surgery using three-dimensional imaging technique.Öğe Improving effects of aminoguanidine on the histologic alterations in rat kidneys in diabetes(Turkiye Klinikleri, 2006) Vardi N.; Iraz M.; Gül M.; Öztürk F.; Uçar M.; Otlu A.Objective: This study was designed to investigate the improving effects of aminoguanidine on renal histological alterations in a streptozotocin (STZ)- induced diabetic rat model. Material and Methods: Fifteen Sprague-Dawley adult female rats were divided into three groups: control, diabetic (D) and diabetic treatment with aminoguanidine (DAG) groups. Experimental diabetes was induced by a single intraperitoneal dose of STZ (45 mg/kg). In the DAG group, AG was added in the drinking water (1 gr/L) after administration of STZ. This was maintained until the end of the study (for 8 weeks). At the end of the experiment, blood glucose levels were determined and after the routine tissue follow-up process, kidneys were embedded in paraffin. Histochemical and immunohistochemical stains were applied and the specimens were examined with light microscope. Results: After 8 weeks, the rats in diabetes group had significantly lower body weight and significantly higher blood glucose levels than the rats of control and DAG groups. The main histological changes resulting from diabetes were detected in glomerular and tübüler basal membrane and epithelial cells (glycogen accumulation, swelling and vacuolization). We observed the improving effects of aminoguanidine treatment on rat kidney. Conclusion: In conclusion, chronic administration of aminoguanidine reduced renal injury in STZ- induced diabetic rats. Therefore, we believe that aminoguanidine may be used to prevent development of diabetic renal damage. However, further studies are needed to elucidate the mechanisms of the improving effect of aminoguanidine on diabetic complications. Copyright © 2006 by Türkiye Klinikleri.Öğe Ultrastructure of human umbilical vessels in pre-eclampsia(Parthenon Publishing Group Ltd, 2002) Çetin A.; Kükner A.; Öztürk F.Objective: Our objective in this study was to investigate the ultrastructure of endothelial and muscle cells of human umbilical vessels in both normal and pre-eclamptic pregnancies. Methods: Ten umbilical cords from pre-eclamptic (36, 38 and 40 weeks) and four from normal pregnancies (40 weeks) were collected immediately after vaginal deliveries. Umbilical veins and arteries were isolated and fixed in phosphate-buffered 2.5% glutaraldehyde solution (pH 7.2) for 4 h and postfixed with 1% osmium tetroxide at 4°C for 2 h. The sections were embedded in Araldit CY 212. Ultrathin sections were stained with uranyl acetate, examined and photographed. Results: Human umbilical vessel endothelial cells showed ultrastructural changes in pre-eclamptic patients. Weibel-Palade bodies and some organelles such as rough endoplasmic reticulum were found in increased numbers in venous endothelial cells. Accumulations of granular material were detected under the venous endothelium. Conclusion: The endothelial and muscle cells of the umbilical vessels from pregnancies complicated by pre-eclampsia showed morphological changes.
