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Öğe Adhesion of a Newly Developed Sealer to Dentin(Int Amer Assoc Dental Researchi A D R/A A D R, 2003) Çobankara, Funda Kont; Altınöz, H. C.; Belli, Sema[Abstract not Available]Öğe Calcifications of the pulp chamber: prevalence and implicated factors(SPRINGER HEIDELBERG, 2009) Şener, Sevgi; Çobankara, Funda Kont; Akgünlü, FarukThe objectives of this study were to describe the prevalence of pulp chamber calcifications in a sample of Turkish dental patients and to report associations between presence of pulp chamber calcifications and dental status, gender, age, and cardiovascular diseases (CVDs). Data were collected through radiographic examination of periapical and bitewing radiographs of 15,326 teeth from 536 dental patients, comprising 270 male and 266 female patients aged between 13 and 65 years. Definite radiopaque focuses inside the radiolucent pulp chamber were defined as pulp chamber calcifications. When the pulp chamber was completely radiolucent, that tooth was scored as tooth without pulp chamber calcification. The dental status was scored as intact, carious, restored, or restored + carious. Pulp chamber calcifications were identified in 204 (38%) patients examined. Of the 15,326 teeth, 747 (4.8%) had pulp chamber calcifications. Gender and dental status were found to be correlated with the presence of pulp chamber calcifications. The high prevalence of pulp chamber calcifications in carious, restored, and restored + carious teeth support the view that the occurrence of pulp chamber calcifications can be a response to long-standing irritants. However, to report any associations between occurrence of pulp chamber calcifications and different dental or clinical status, further studies are still needed.Öğe Comparison of Organic Tissue Dissolution Capacities of Sodium Hypochlorite and Chlorine Dioxide(Elsevier Science Inc, 2010) Çobankara, Funda Kont; Büyüközer Özkan, Hatice; Terlemez, ArslanThe organic tissue dissolution properties of irrigating solutions are important for the success of endodontic treatment. Chlorine dioxide (ClO(2)) has been recently proposed as an irrigation solution in endodontics. The organic tissue dissolution property of sodium hypochlorite (NaOCl) is well-known and extensively investigated, but apparently no data have been published on tissue-dissolving properties of ClO(2). The aim of this in vitro study was to compare organic tissue dissolution capacity of NaOCl and ClO(2). In this study, 5.25% NaOCl, 13.8% ClO(2), and, as a control, isotonic saline solutions (0.9% NaCl) were used. Thirty bovine pulp specimens were previously weighed and immersed for 20 minutes in each test solution (changing the solution every 2 minutes). The pulp specimens were then blotted dry and weighed again. The percentage of weight loss was calculated and statistically analyzed by using one-way analysis of variance and post hoc Tukey honestly significant difference tests. Saline solution did not dissolve the organic tissue. Both 5.25% NaOCl and 13.8% ClO(2) dissolved the tissue pieces more effectively than saline control (P <.05). No statistically significant difference was found between the tissue-dissolving properties of 5.25% NaOCl and those of 13.8% ClO(2) (P>.05). Within the limitations of this in vitro study, it was concluded that ClO(2) and NaOCl are equally efficient for dissolving organic tissue. (J Endod 2010;36:272-274)Öğe Effect of home bleaching agents on the microhardness of human enamel and dentin(WILEY, 2004) Ünlü, Nimet; Çobankara, Funda Kont; Altınöz, C.; Özer, FüsunIn this study, the effects of home bleaching agents that contains carbamide peroxide (in different concentrations such as 10 and 15%) on the surface hardness of human enamel and dentine were evaluated. The buccal surfaces of 90 recently extracted human mandibular anterior teeth were used. The specimens in the dentine group were ground to expose of dentine surface. Then, samples in both enamel and dentine group were randomly divided into six main groups with 15 in each group. In the group 1 and 4, 15% carbamide peroxide was applied to the enamel and dentine surfaces and then the teeth were left in an incubator at 37 degreesC and 100% humidity for 4 h first, then left 28 h after repeating the same procedures seven times. The teeth were treated with 10% carbamide peroxide in groups 2 and 5 and distilled water in groups 3 and 6 (control groups), using the same procedures. Vicker's microhardness of enamel and dentine were assessed on each tooth before and after each treatment period (4 and 28 h). The hardness of control group specimens was also obtained after 4 h in distilled water and then after 28 h. For statistical analysis one-way anova and post-hoc Tukey tests were used. For both 10 and 15%, there were no statistically significant differences between the untreated control specimens and the specimens treated with the bleaching materials for enamel and dentine at any given measurement time (P > 0.05). Nevertheless, in vivo use of bleaching agents on tooth hard tissues requires further analysis.Öğe Effect of home bleaching agents on the roughness and surface morphology of human enamel and dentine(WILEY, 2004) Çobankara, Funda Kont; Ünlü, Nimet; Altınöz, Halil Cenk; Özer, FüsunAims: Carbamide peroxide (CP) containing bleaching agents are now widely used in different concentrations. In this study, the effect of 10% and 15% CP containing home bleaching agents on the surface roughness and morphology of human enamel and dentine were evaluated in vitro. Methods: 90 non-carious human mandibular incisors were divided randomly into two equal groups (enamel and dentine). The dentine group specimens were ground to expose dentine surfaces. The samples in both groups were then randomly divided into three main groups and then divided into three subgroups, according to bleaching application times (n=15). The samples in both enamel and dentine groups were treated with 10% CP at Group 1 and 4,15% CP at Group 2 and 5 and distilled water at Group 3 and 6. The surface roughness of the samples was analysed before bleaching (11 a, 2a, 3a for enamel, 4a, 5a, 6a for dentine), after 4hr (1b, 2b, 3b for enamel, 4b, 5b, 6b for dentine) and after 28hr of bleaching application (1 c, 2c, 3c for enamel, 4c, 5c, 6c for dentine) using a computerised roughness tester. The surface morphologies of treated and control specimens were also examined by SEM. Results: There were no statistically significant differences between the surface roughness of untreated control specimens and the specimens treated with the bleaching materials (10% and 15% CP) for both enamel and dentine at any given measurement time (p > 0.05). Conclusion: Under the careful guidance of a dentist, home bleaching can be thought a reliable treatment for both stained enamel and dentine, regardless of whether 10% or 15% CP is used.Öğe The Effect of Smear Layer Upon the Apical Leakage of Two Different Root Canal Sealers(Int Amer Assoc Dental Researchi A D R/A A D R, 2002) Çobankara, Funda Kont; Adanır, N.; Belli, Sema[Abstract not Available]Öğe The Effect of Two Different Root Canal Sealers and Smear Layer on Resistance to Root Fracture(Elsevier Science Inc, 2002) Çobankara, Funda Kont; Üngör, Mete; Belli, SemaThe purpose of this in vitro study was to test the effect of Ketac-Endo (KE) and AH 26 on resistance to root fracture and also to evaluate the effect of smear layer. Seventy-two human maxillary canine teeth were randomly divided into six groups (n = 12) and were prepared using six different methods: group 1: KE, without smear layer (smear -); group 2: KE, with smear layer (smear +); group 3: AH 26, smear (-); group 4: AH 26, smear (+); group 5 (negative control): nonprepared; group 6 (positive control): prepared but unfilled. After storing 1 week in 100% humidity at 37 degreesC, the coronal lingual walls and root canal spaces were lowered 2 mm below the buccal walls of the roots. The samples were placed into acrylic resin blocks so that 10 mm of buccal roots were exposed and were placed in a specially designed steel pad at an angle of 15 degrees to the long axis of the root. A slowly increasing force was applied at the junction of the buccal wall and root canal space until fracture occurred. The force required to fracture each tooth was recorded as kg and statistically analyzed using oneway analysis of variance and Duncan tests. The results indicated that instrumentation of the root canals significantly weakened the tooth structure to fracture (p < 0.05). The canals obturated with either sealer were significantly stronger than roots whose canals were instrumented but not obturated (p < 0.05), and there was no difference between the sealers. The presence or absence of the smear layer did not cause any significant effect on the root fracture resistance of the teeth (p > 0.05).Öğe In vitro antibacterial activities of root-canal sealers by using two different methods(ELSEVIER SCIENCE INC, 2004) Çobankara, Funda Kont; Altınöz, Halil Cenk; Ergani, Osman; Kav, Kürşat; Belli, SemaThe purpose of this in vitro study was to evaluate the antibacterial activity of five different root-canal sealers (RoekoSeal, Ketac-Endo, AH Plus, Sealapex, Sultan). With the use of Enterucoccus faecalis as a test organism, both the agar-diffusion test (ADT) and direct-contact test (DCT) were performed. For DCT, sealers were mixed and placed on the sidewall of microtiter plate wells. A 10-mul bacterial suspension was placed on the tested material samples. Bacteria were allowed to directly contact to the sealers for 1 h at 37degreesC. Bacterial growth was then spectrophotometrically measured through every 30 min for 19 h by using an Anthos Labtec HT 2. For ADT, a 200-mul bacterial suspension was spread on brain-heart infusion agar plates. Freshly mixed sealers were poured into uniform wells punched in the agar. After periods of incubation at 37degreesC for 24 h and 7 days in humid atmosphere, the zones of inhibition of bacterial growth on agar plates were observed and measured. Ketac-Endo, Sultan, and AH Plus had similar results for DCT. These sealers were more potent bacterial-growth inhibitors than Sealapex and RoekoSeal. According to ADT, RoekoSeal showed no antibacterial activity. There was no significant difference among AH Plus, Sealapex, and Sultan (p > 0.05). Ketac-Endo demonstrated lower antimicrobial activity than these sealers (p < 0.05). Time had no effect on the antibacterial activity of the tested sealers (p > 0.05). The antibacterial efficiency of the materials varied according to the tests used. It was concluded that the technique, time, and ingredients of the tested material can affect the results of the microbiological studies.Öğe Preoperatif analjezik ilaçların ve kombinasyonlarının, irreversibl pulpitisli mandibular molar dişlerde inferior alveoler sinir blok anestezisi başarısına etkisi: Klinik araştırma(Selçuk Üniversitesi, 2019) Terlemez, Arslan; Çobankara, Funda KontAmaç: İnferior alveolar sinir bloğu (İASB), mandibular molar dişlerin endodontik tedavisi için en sık kullanılan anestezi tekniğidir, fakat irreversibl pulpitisli hastalarda İASB anestezi başarısı önemli derecede azalmaktadır. Bu çalışmanın amacı, oral preoperatif analjezik ilaçların veya ilaç kombinasyonlarının uygulanmasının, irreversibl pulpitisli mandibular molar dişlerde İASB başarısı üzerine etkisini değerlendirmektir. Gereç ve Yöntem: Bu çift kör, plasebo kontrollü klinik çalışmada, 5 grupta toplam 150 hastaya (n=30) İASB anestezisinden 1 saat önce; plasebo veya 1000 mg asetaminofen, 8 mg lornoksikam, 1000 mg asetaminofen + 50 mg tramadol, 8 mg lornoksikam + 50 mg tramadol ilaçlarından biri verildi. Tüm hastalara 1:80.000 epinefrin içeren 1.8 ml %2'lik lidokain solüsyonu ile standart İASB uygulandı. Tüm hastalar Heft-Parker görsel analog skalasına (HPVAS); ilaç almadan önce (HPVAS-1), ilaç aldıktan 1 saat sonra (HPVAS-2), giriş kavitesi preperasyonu ve kök kanalı enstrümantasyonu sırasında (HPVAS-3) olacak şekilde hissettikleri ağrı skorlarını işaretledi. Elde edilen veriler istatistiksel olarak analiz edildi. Bulgular: Hastaların; yaş, cinsiyet, başlangıç ağrısı ve diş dağılımı arasında istatistiksel olarak anlamlı fark olmadığı gözlendi (p> 0.05). Plasebo, asetaminofen, lornoksikam, asetaminofen + tramadol ve lornoksikam + tramadol için başarı oranları sırasıyla %60, %66, %54, %50 ve %54 idi. Deney gruplar arasında istatistiksel olarak anlamlı fark olmadığı bulundu. (p> 0.05). Sonuç: Bu çalışmanın limitasyonları dâhilinde preoperatif asetaminofen, lornoksikam, asetaminofen + tramadol veya lornoksikam + tramadol uygulamasının, irreversibl pulpitisli mandibular molarlar için İASB'nin başarı oranları üzerinde anlamlı bir etkisi yoktur. İrreversibl pulpitisli hastaların endodontik tedavi sırasındaki konforunu artırmak için farklı analjezik ve analjezik kombinasyonlarıyla ilgili daha fazla premedikasyon çalışması önerilmektedir.
