Person: GÜNEŞER, MEHMET BURAK
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Publication Metadata only Effects of fruit vinegars on root dentin microhardness and roughness.(2019-01-01) AKBULUT, MB; Guneser, MEHMET BURAK; ELDENIZ, AU; GÜNEŞER, MEHMET BURAKPublication Open Access Tooth discoloration effects of calcium silicate based barrier materials used in revascularization and treatment with internal bleaching(2017-12-01T00:00:00Z) Akbulut, Makbule Bilge; Terlemez, Arslan; Akman, Melek; Buyukerkmen, Begum; Guneser, Mehmet Burak; Eldeniz, Ayce Unverdi; GÜNEŞER, MEHMET BURAKBackground/purpose: Usage of barrier materials is an important step in revascularization procedure. One of the undesired properties of these barrier materials is to cause coronal tooth discoloration. The aim of this in vitro study was to evaluate the tooth discoloration induced by ProRoot MTA (PMTA), Biodentine, and MM-MTA, as well as the efficacy of internal bleaching on this discoloration.Publication Open Access Do the intracanal medicaments affect the marginal adaptation of calcium silicate-based materials to dentin?(2019-06-01T00:00:00Z) Dincer, ASİYE NUR; Ozturk, TY; Guneser, MEHMET BURAK; Taschieri, S; Maddalone, M; Venino, PM; Del, Fabbro; GÜNEŞER, MEHMET BURAK; DİNÇER, ASİYE NURPublication Open Access Apical extrusion of debris during root canal preparation using a novel nickel-titanium file system: WaveOne gold.(2017-09-01) Dincer, ASİYE NUR; GUNESER, MEHMET BURAK; ARSLAN, D; DİNÇER, ASİYE NUR; GÜNEŞER, MEHMET BURAKPublication Open Access The effect of gelatinase production of <i>Enterococcus faecalis</i> on adhesion to dentin after irrigation with various endodontic irrigants.(2016-11-15) Guneser, MEHMET BURAK; ELDENIZ, AU; GÜNEŞER, MEHMET BURAKObjectives: The aim of this study was to evaluate whether the gelatinase production ability of Enterococcus faecalis provides any advantage on adhesion of this bacterium to dentin treated with various irrigants and their combinations. Materials and methods: Standardized dentin discs were randomly divided into five groups (n = 20): group 1: 2.5% sodium hypochlorite (NaOCl), group 2: 2% chlorhexidine (CHX), group 3: NaOCl + Saline + CHX, group 4: NaOCl + EDTA + NaOCl, group 5: QMix. After incubation of dentin discs with irrigants, each group was divided into two subgroups (n = 10) according to the bacterial strains used; a gelatinase-producing and a gelatinase-deficient strain of E. faecalis. After incubation of the discs with the bacterial suspensions aerobically for 48 h, XTT assay was conducted for bacterial adherence evaluation. Data were statistically analyzed by ANOVA and Tukey's HSD tests (p = .05). Results: Gelatinase-producing E. faecalis adhered to dentin was significantly more than gelatinase-deficient E. faecalis in all test groups (p < .05). Adherence to CHX-treated dentin was lower than to the surfaces treated with other irrigants, alone or in combination (p < .05). These differences were significant except for comparisons with QMix for gelatinase-producing bacteria (p < .05). Conclusions: Gelatinase production of E. faecalis may be an important factor for bacterial adhesion. The addition of CHX to the irrigation regimen resulted in fewer adhered bacteria to dentin. QMix was not as effective as CHX in terms of bacterial adhesion prevention.Publication Open Access Compressive strength, surface roughness, and surface microhardness of principle tricalcium silicate-based endodontic cements after universal adhesive application(2022-03-01T00:00:00Z) Olcay, K; Guneser, MEHMET BURAK; Dincer, A N; Uyan, H M; GÜNEŞER, MEHMET BURAKAims and background: It was aimed to evaluate compressive strength (CS), surface roughness, and microhardness of mineral trioxide aggregate (ProRoot MTA) and Biodentine (BD) after adhesive application. Materials and methods: Tests was carried out according to international ISO standard. ProRoot MTA and BD were prepared in Teflon molds according to manufacturer's instructions: n = 210 for CS; n = 210 for microhardness. Samples were incubated for 7 days at 37°C in 100% humidity. Surfaces were smoothed with up to 2000 grits of silicon-carbide sandpaper on abrasive device at 150 rpm, randomly divided into seven groups (n = 15). Clearfil Universal Bond, All Bond Universal, and Single Bond Universal (SBU) were applied in both total-etch and self-etch (SE) modes. Adhesives were applied according to manufacturers' recommendations (no adhesive used in control). CS was performed at speed of 1 mm/min, microhardness at 100 gr for 15 s. The surface roughness of the samples was analyzed with atomic force microscopy. Two-way analysis of variance and post hoc Tukey tests were used for the evaluation of the data. Results: Man CS and microhardness values between ProRoot MTA and BD were as follows: 24.9 N, 72.6 HV; 59.8 N, 59.0 HV, respectively. In CS, BD was higher than ProRoot MTA (P < 0.05). In other comparisons except for SBU SE group (P < 0.05), BD and ProRoot MTA showed similar results (P > 0.05). However, ProRoot MTA was found higher than BD regarding microhardness (P < 0.05). As a result of the adhesive application in both BD and ProRoot MTA groups, a decrease in surface roughness was observed compared to the control group. Conclusion: BD exhibited better results than ProRoot MTA regarding CS. However, ProRoot MTA was found to be more successful than BD in terms of microhardness. BD and ProRoot MTA showed similar physical properties in terms of surface roughness. To improve regenerative procedures, besides the selection of bioceramic cements, the interaction between cements and materials applied during coronal restoration should be considered.Publication Open Access Antibacterial effect of chlorhexidine-cetrimide combination, Salvia officinalis plant extract and octenidine in comparison with conventional endodontic irrigants(2016-10-01) Guneser, MEHMET BURAK; Akbulut, Makbule Bilge; Eldeniz, Ayce Unverdi; GÜNEŞER, MEHMET BURAKThe aim of the present study was to compare the antimicrobial effect of sodium hypochlorite (NaOCl), 2% chlorhexidine (CHX), a CHX/cetrimide solution (CHX+CTR), octenidine hydrochloride (OCT) and Salvia officinalis plant extract against Enterococcus faecalis. Seventy decoronated single-rooted human teeth were infected and divided into 6 test (n=10) and 2 control groups (n=5) (negative, sterile samples and positive, infected samples). Following irrigants were then applied to test groups: 2.5% NaOCl, 5.25% NaOCl, CHX, CHX+CTR, S. officinalis extract and OCT. The dentin chips were obtained from inner root canal walls and analyzed by counting the number of colony forming units (CFU). The 2.5% NaOCl, 5.25% NaOCl, CHX and OCT groups presented no bacterial growth (CFU=0). S. officinalis and CHX+CTR groups reduced the number of E. faecalis cells but could not eliminate all. OCT may have potential as an endodontic irrigant in treatment of infected root canals.Publication Metadata only Effect of nanosized bioactive glass addition on some physical properties of biodentine.(2023-01-01) Guneser M. B.; Ozturk T. Y.; Sahin A. N. D.; Uysal B. A.; Eldeniz A. U.; GÜNEŞER, MEHMET BURAKPublication Metadata only comparison of the effectiveness of single-visit and multi-visit root canal treatment on healing intra-oral sinus tract(2023-12-09) Peker F. B.; Güneşer M. B.; PEKER, FATMA BEGÜM; GÜNEŞER, MEHMET BURAKComparison of the effectiveness of single-visit and multi-visit root canal treatment onhealing intra-oral sinus tractFatma Begüm Peker, Mehmet Burak GüneşerDepartment of Endodontics, School of Dentistry, Bezmialem Vakif UniversityObjective: To evaluate postoperative pain and intra-oral sinus tract healing in teeth with chronic apical periodontitistreated in a single visit and to compare the results with multi-visit root canal treatment using an intracanal calciumhydroxide.Materials-Methods: A total of 60 patients in need of non-surgical endodontic treatment participated in this study. Allpatients provided informed consent. The age range of the patients was between 18 and 65 years. The selectedteeth all had a single root and single canal, along with radiographic evidence of apical periodontitis and intra-oralsinus tracts. The patients were randomly divided into two study groups: Group 1(single-visit) and Group 2(multi-visit). Local anesthesia (Ultracaine DSForte;Aventis Pharma,Istanbul,Turkey) was administered and the tooth wasisolated with a rubber dam. Access cavities were created using sterile diamond burs. The working length of eachtooth was determined using an electronic apex locator (Propex Pixi,DentsplySirona,Ballagues,Switzerland) and asize #15 K-type stainless steel file was inserted into the root canal, confirmed radiographically. To shape the rootcanals, nickel–titanium rotary files (VDW GmbH,Munich,Germany) were used in accordance with the manufacturer’sinstructions. Rotary files with a #40 size and variable taper tips of up to 0.04 were used. In the multi-visit group,after the shaping process, calcium hydroxide was placed. All multi-visit treatments were completed one week afterthe initial visit. For all groups, the final irrigation process consisted of the following steps: 5 mL of 2.5% sodiumhypochlorite (Wizard,Ankara,Turkey), 5 mL of 17% ethylenediaminetetraacetic acid (Werax,Izmir,Turkey) and 5 mLof saline. In the single-visit group, after the final irrigation, the root canals were filled with gutta-percha and epoxyresin-based root canal sealers (Ah Plus,DentsplySirona) using the cold lateral compaction method during the samesession. For the multi-visit group, after the removal of calcium hydroxide and following the final irrigation protocol,the root canals were filled during the second appointment. Radiographic checks were performed to ensure properroot canal fillings. Coronal restorations of the teeth were carried out with resin composite material (Z250,3M ESPE).Postoperative pain was scored for the 2 days following the treatment using a visual analogue scale. In the multi-visit group, pain was also assessed at the beginning of the second appointment and patients were asked about thepresence or absence of pain between visits. All patients were scheduled for follow-up appointments and weremonitored until the day of the sinus tracts were healed (Healing means the closing of the sinus tract). Data wereanalyzed using the two sample proportion test and Pearson chi-square tests (α=0.05).Results: There were no significant differences between two groups regarding the incidence of postoperative pain(p>0.05). In the multi-visit group, greater healing was observed on the 3rd and 7th days as compared to the 14thday(p<0.05). However, the day of healing showed a homogeneous distribution in the single-visit group, and therewere no statistically significant differences between the 3rd, 7th, and 14th days(p>0.05).Conclusion: Both groups experienced similar postoperative pain. But it has been observed that a multi-visit protocolprovides earlier healing than a single-visit.Keywords: sinus tract, apical periodontitis, single-visit, multi-visit, postoperative painPublication Metadata only Diş Hekimliği Öğrencilerinin Rubber-Dam Kullanımına Bakış Açısı ve Covid-19 Pandemisinin Etkisi: Anket Çalışması(2022-09-09) Nalcı G.; Balkancı B.; Uysal B. A.; Güneşer M. B.; Şahin A. N.; NALCI, GAMZE; GÜNEŞER, MEHMET BURAKAMAÇ: Bu çalışmanın amacı diş hekimliği fakültesi öğrencilerinin rubber-dam kullanımına bakış açısını tespit etmek, tercih etme veya etmeme sebeplerini ve COVID-19 pandemisinin etkisini araştırmaktır. GEREÇ VE YÖNTEM: Türkiye’nin çeşitli şehirlerindeki 944 diş hekimliği fakültesi dördüncü ve beşinci sınıf öğrencisine e-posta ve internet aracılığıyla 22 sorudan oluşan anket gönderildi. Çalışmaya yalnızca anketi tamamlayan katılımcılar dahil edildi. Açıklayıcı istatistiklere ek olarak yöntemlerin karşılaştırılmasında ki-kare testi kullanıldı. Sonuçlar anlamlılık düzeyinde değerlendirildi (𝑃 <0.05). BULGULAR: 370’i (%67.9) kadın, 175’i (%32.1) erkek olmak üzere 545 öğrenci anketi tamamladı. Katılımcıların %25.1’i daha önce hiç rubber-dam kullanmamış ve %41.8’i rubber-dam kullanımıyla ilgili tatmin edici bir eğitim almadığını belirtmiştir. Endodontik tedavi yaptığı her hastada rubber-dam kullanan katılımcı oranı ise %34.5’tir. Katılımcıların %87’si rubber-damın kök kanallarına erişimi kolaylaştırdığını, ancak %88,8’i rubber-damın radyograf alma prosedürünü zorlaştırdığını belirtmektedir. Öğrencilerin %69.2’si rubber-damın bulaş riskini azaltabileceğini düşünmüş ve %68.6’sında rubber-dam kullanma isteğinde artış olmuştur. SONUÇ: Öğrencilerin rubber-dam kullanımına karşı güncel bakış açılarını tespit etmek, eğitim içeriğine yön vermede faydalı olabilir. COVID-19 pandemisi gibi diğer tüm bulaşıcı hastalıklarla mücadelede öğrencilerin rubberdam bilgisinin ve yetkinliğinin artırılması önem taşımaktadır.