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Öğe A comparative evaluation of the effects of bevacizumab and 5-fluorouracil on wound healing in rat model(Drunpp-Sarajevo, 2012) Gunay, Ahmet; Atilgan, Serhat; Yesilova, Yavuz; Yaman, Ferhan; Ozgoz, Mehmet; Lacin, NihatPurpose: Our aim is to evaluate the use of combined bevacizumab with 5-Fluorouracil (5-FU) on post-operative scarring survival following experimental skin incision surgery in comparison to the agents alone. Material and methods: Skin incision surgery was performed on 28 female Spraque-Dawley rats. The rats were allocated to one of four treatments: 5-FU combined with Bevacizumab, 5FU alone, bevacizumab alone and phosphate buffered saline (PBS). A single subcutaneous injection was administered immediate postoperatively. Histological staining determined the presence of cutaneous fibrosis and mRNA expression of collagen I and fibronectin in the tissue was quantified. Results: Relative quantity of Colla1 mRNA transcript 5 fold increased in Group 1 (PBS) in comparison to control group. However, Colla1 level in Group 2 (5-FU) and 3 (bevacizumab) is decreased. The lowest level of Colla1 was detected in Group 4 (combination of 5-FU and bevacizumab). On the other hand, relative quantity of Fn1 is slightly elevated in Group 1 (PBS) and decreased in Group 2 (5-FU) and group 3 (bevacizumab) in comparison to control group. The lowest level of Fn 1 was detected in Group 4 (combination of 5-FU and bevacizumab). Conclusions: Bevacizumab in combination with 5-FU resulted in a greater anti-fibrotic effect compared to monotherapy with 5FU or bevacizumab alone, as evidenced by the attenuation in fibronectin and mature collagen I expression and deposition. (P<0.05) The results provide compelling evidence that combined bevacizumab and 5-FU offers superior anti-fibrotic effect over monotherapy. A synergistic effect is suggested to be present.Öğe The effect of low-level laser therapy on the healing of hard palate mucosa and the oxidative stress status of rats(Wiley, 2014) Firat, Ela Tules; Dag, Ahmet; Gunay, Ahmet; Kaya, Beyza; Karadede, Mehmet Irfan; Kanay, Berna Ersoz; Ketani, Aydin[Abstract Not Available]Öğe Effects of caffeic acid phenethyl ester on palatal mucosal defects and tooth extraction sockets(Dove Medical Press Ltd, 2014) Gunay, Ahmet; Arpag, Osman Fatih; Atilgan, Serhat; Yaman, Ferhan; Atalay, Yusuf; Acikan, IzzetAim: The purpose of this study was to evaluate the effects of caffeic acid phenethyl ester (CAPE) on palatal mucosal defects and tooth extraction sockets in an experimental model. Materials and methods: Forty-two male Sprague-Dawley rats with a mean age of 7 weeks and weighing 280-490 g were used in this study. The rats were randomly divided into two groups: group A (the control group, n=21) and group B (the experimental group, n=21). Under anesthesia with ketamine (8 mg/100 g, intraperitoneally), palatal mucosal defects were created and tooth extraction was performed in the rats in groups A and B. Group A received no treatment, whereas group B received CAPE. CAPE was injected daily (10 mu mol/kg, intraperitoneally). The rats were killed on days 7, 14, and 30 after the procedures. Palatal mucosa healing and changes in bone tissue and fibrous tissue were evaluated histopathologically. Result: Pairwise comparisons showed no statistically significant difference between days 7 and 14 in either group (P>0.05). At day 30, bone healing was significantly better in group B (CAPE) than in group A (control) (P<0.05). Fibrinogen levels at day 30 were significantly higher in group A (control) than in group B (CAPE) (P<0.05). Pairwise comparisons showed no statistically significant difference in palatal mucosa healing levels between days 7 and 14 in both groups (P>0.05). Conclusion: In conclusion, the findings of this study suggest that CAPE can significantly improve tooth socket healing.Öğe The Effects of Low-Level Laser Therapy on Palatal Mucoperiosteal Wound Healing and Oxidative Stress Status in Experimental Diabetic Rats(Mary Ann Liebert, Inc, 2013) Firat, Ela Tules; Dag, Ahmet; Gunay, Ahmet; Kaya, Beyza; Karadede, Mehmet Irfan; Kanay, Berna Ersoz; Ketani, AydinObjective: The biostimulation effects of low-level laser therapy (LLLT) have recently been demonstrated. In this study, we aimed to investigate the effects of LLLT on palatal mucoperiostal wound healing and oxidative stress status in experimental diabetic rats. Materials and methods: Forty-two male Wistar rats that weighed 250-300 g were used in this study. Experimental diabetes was induced in all of the rats using streptozotocin. A standardized full thickness wound was made in the mucoperiosteum of the hard palates of the rats using a 3 mm biopsy punch. The rats were divided into groups: 1 (control group, non-irradiated), and 2 (experimental group, irradiated). Treatment using a GaAlAs laser at a wavelength of 940 nm and at dose of 10 J/cm(2) began after surgery, and was repeated on the 2nd, 4th, and 6th days post-surgery. Seven animals from each group were killed on the 7th, 14th, and 21st day after surgery. Biopsies were performed for the histological analysis and blood samples were collected by cardiac puncture for biochemical analysis. Results: The histopathological findings revealed reduced numbers of inflammatory cells, and increased mitotic activity of fibroblasts, collagen synthesis, and vascularization in rats in group 2. The total oxidative status was significantly decreased in the laser-treated group on the 21st day. Conclusions: LLLT elicits a positive healing effect on palatal mucoperiostal wounds, and modulates the oxidative status in experimental diabetic rats.Öğe Effects of Sildenafil on Dental Tissue(Medwell Online, 2011) Yaman, Ferhan; Soker, Sevda; Atilgan, Serhat; Erol, Behcet; Alp, Harun; Agacayak, Serkan Kamil; Gunay, AhmetTo investigate the effects of Sildenafil on dental tissue. The study was performed with adult female Wistar-Albino rats. Control group (n = 7) were fed on standard laboratory diet until surgery. The study group (n = 7) were administered Sildenafil orally with orogastric tube 10 mg kg(-1) once a day for 30 days. Each rat was anesthetized and mandibular bone with incisor teeth and soft tissue were removed. Dental pulp, dentin, periodental ligament, periodental soft tissue and bone were examined histologically. Neovascularization on the dental pulp and gingiva were significantly higher in the study group. Sildenafil can be used as a supporting factor in dental tissue healing.Öğe An evaluation of clinical, radiological and three-dimensional dental tomography findings in ectodermal dysplasia cases(Medicina Oral S L, 2015) Dogan, Mehmet-Sinan; Callea, Michele; Yavuz, Izzet; Aksoy, Orhan; Clarich, Gabriella; Gunay, Ayse; Gunay, AhmetBackground: This study aimed to review the results related to head and jaw disorders in cases of ectodermal dysplasia. The evaluation of ectodermal dysplasia cases was made by clincal examination and examination of the jaw and facial areas radiologically and on cone-beam 3-dimensional dental tomography (CBCT) images. Material and Methods: In the 36 cases evaluated in the study, typical clinical findings of pure hypohidrotic ectodermal displasia (HED) were seen, such as missing teeth, dry skin, hair and nail disorders. CBCT images were obtained from 12 of the 36 cases, aged 1.5-45 years, and orthodontic analyses were made on these images. Results: The clinical and radiological evaluations determined, hypodontia or oligodontia, breathing problems, sweating problems, a history of fever, sparse hair, saddle nose, skin peeling, hypopigmentation, hyperpigmentation, finger and nail deformities, conical teeth anomalies, abnormal tooth root formation, tooth resorption in the root, gingivitis, history of epilepsy, absent lachrymal canals and vision problems in the cases which included to the study. Conclusions: Ectodermal dysplasia cases have a particular place in dentistry and require a professional, multi-disciplinary approach in respect of the chewing function, orthognathic problems, growth, oral and dental health. It has been understood that with data obtained from modern technologies such as three-dimensional dental tomography and the treatments applied, the quality of life of these cases can be improved.Öğe Examination of the tissue ghrelin expression of rats with diet-induced obesity using radioimmunoassay and immunohistochemical methods(Springer, 2012) Aydin, Suleyman; Sahin, Ibrahim; Ozkan, Yusuf; Dag, Ersel; Gunay, Ahmet; Guzel, Saadet Pilten; Catak, ZekiyeCurrently, obesity is an important health problem in all countries, both developed and developing. Dietary habits and neurohormonal imbalances play a critical role in obesity. Circulating amounts of ghrelin, which is a neurohormonal hormone, decrease with obesity and increase with weight loss. Although it is known that both mRNA and peptide version of the ghrelin hormone are expressed in almost all tissues of both humans and animals, it is not known how obesity changes the expression of this hormone in the tissues, with the exception of the gastrointestinal system tissues. Therefore, the objective of the present study is to show how diet-induced obesity in rats changes ghrelin expression in all system tissues, and thus, to shed light on the etiopathology of obesity. The study included 12 male and 12 female 2-month-old Wistar albino species rats. The animals in the control group were fed on standard rat pellet, while those in the experiment group were fed ad libitum on a cafeteria-style diet for 2 months. When their body mass index reached 1 g/cm(2), diet-induced obese (DIO) rats were sacrificed in a sterile environment after one night fasting. Ghrelin localizations in the tissues were studied immunohistochemically using avidin-biotin-peroxidase complex (ABC) method, while tissue ghrelin amounts were analyzed using radioimmunoassay (RIA) method. When the ghrelin amounts in the urogenital system (with the exception of kidney tissues), sensory organs, respiratory system, immune system, skeletal muscle system, cardiovascular system, nervous system, and adipose tissue of rats analyzed by RIA method were compared to those in the control group, tissue ghrelin amounts in the DIO group were found lower. Immunohistochemical findings which showed a similar fall in ghrelin concentrations in the tissues were parallel to RIA results. In addition, ghrelin was shown to be synthesized in the cardiovascular system, heart muscle cells, tails of the sperms, hair follicles, lacrimal glands, tongue, and teeth of rats for the first time in this study and ghrelin syntheses in these tissues were found to decrease in obesity. Nutritional obesity is among the most common causes of obesity and the findings we have obtained through diet-induced obesity will contribute to the illumination of the etiopathology of obesity.Öğe HISTOLOGICAL EXAMINATION OF THE EFFECTS OF LOW-LEVEL LASER THERAPY ON HEALING OF GINGIVA AFTER GINGIVECTOMY IN RATS(Taylor & Francis Ltd, 2013) Firat, Ela Tules; Dag, Ahmet; Gunay, Ahmet; Kanay, Berna Ersoz; Ketani, Sennur; Ketani, M. AydinLasers in dentistry find an increasing usage in recent years. The aim of this study was to assess the effects of low-level laser therapy (LLLT) on healing of gingiva after gingivectomy in rats. Forty-two male Wistar rats, 250 g to 300 g in weight, were used in this study. Gingivectomy was made to gingiva of mandibular incisors in all rats. The rats were divided into: group 1 (control group, non-irridated), and group 2 (experimental group, irridation-treated). After gingivectomy, a low-level laser therapy (LLLT) was applied to the side of the operation area. Treatment using a GaAlAs laser at a wavelength of 940 nm and a dose of 10 J/cm(2) began after surgery and was repeated on the 2nd, 4th and 6th day post-surgery. Seven animals from each group were sacrificed on the 7th, 14th and 21st day after surgery. Biopsies were performed for histological analysis. In the laser-treated grup, the histopathological findings revealed increased mitotic activity of fibroblasts and collogen synthesis on the 7th day, better formed epithelial layer, mild keratinization, collagen fibers and vascularization on day 14. On the 21st day after surgery, marked collagen fibers and vascularization was assesed according to the control group. The results of this study indicate that low-energy level laser therapy appeared to exert a positive effect in epithelization and wound healing after gingivectomy.Öğe The relationship between high incidence of deep neck infection and toothbrushing frequency(Academic Journals, 2012) Bakir, Salih; Gunay, Ahmet; Tanriverdi, Halis; Gun, Ramazan; Atilgan, Serhat; Palanci, Yilmaz; Ozbay, MusaThis study aimed to investigate and compare the frequency of toothbrushing and dental health status between deep neck space infection (DNSI) patients with dental origin and healthy population. 64 participants were included in this study in the form of two groups. The first group consisted of 34 DNSI patients with dental onset, and the second group consisted of 30 participants (control group). Study was carried out in two separate categories: the frequency of toothbrushing and assessment of dental health status. Toothbrushing frequency was evaluated with a questionnaire. Dental health status was assessed for periodontal and dental disease by periodontist according to the some widely used indicators; Decayed Missing Filled Teeth (DMFT) scores, Plaque Index score, Gingival Index score and Sulcus Bleeding Index score. Present study showed that the majority had brushed their teeth occasionally. In DNSI group, the percentage of never toothbrushing was very high and regular toothbrushing rate was so low. DNI group has higher scores than the control group and this indicates poor oral hygiene. Our results showed that, oral health was impaired and regular toothbrushing seems to have been neglected in DNSI group. In our opinion, this negligence is a very important contributory factor towards the more occurrence of deep neck abscess.Öğe The relationship between high incidence of deep neck infection and toothbrushing frequency(Academic Journals, 2012) Bakir, Salih; Gunay, Ahmet; Tanriverdi, Halis; Gun, Ramazan; Atilgan, Serhat; Palanci, Yilmaz; Ozbay, MusaThis study aimed to investigate and compare the frequency of toothbrushing and dental health status between Deep neck space infection (DNSI) patients with dental origin and healthy population. 64 participants were included in this study in the form of two groups. The first group consisted of 34 DNSI patients with dental onset, and the second group consisted of 30 participants (control group). Study was carried out in two separate categories: the frequency of toothbrushing and assessment of dental health status. Toothbrushing frequency was evaluated with a questionnaire. Dental health status was assessed for periodontal and dental disease by periodontist according to the some widely used indicators; DMFT scores, Plaque Index score, Gingival Index score and Sulcus Bleeding Index score. Present study showed that the majority had brushed their teeth occasionally. In DNSI group, the percentage of never toothbrushing was very high and regular toothbrushing rate was so low. DNI group has higher scores than the control group and this indicates poor oral hygiene. Our results showed that, oral health was impaired and regular toothbrushing seems to have been neglected in DNSI group. In our opinion, this negligence is a very important contributory factor towards the more occurrence of deep neck abscess.
