Person: YILMAZ ATALI, PINAR
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YILMAZ ATALI
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PINAR
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Publication Metadata only Polychromatic Reverse Layering Technique (PRLT) for Crown Fracture Restorations(2022-12-17) KORKUT, BORA; BİLGİN GÖÇMEN, GÜLÇİN; YILMAZ ATALI, PINAR; TARÇIN, BİLGE; Korkut B., Bilgin Göçmen G., Yilmaz Atali P., Tarçin B., Yanikoğlu F.Publication Metadata only Replacing of mandibular anterior restorations using one-shade composite resin: case report(2021-11-23) YILMAZ ATALI, PINAR; TÜRKMEN, CAFER; MANAV, AYBİKE; Manav Özen A., Yılmaz Atalı P., Türkmen C.Publication Open Access Evaluating the effects of different remineralization agents on initial enamel lesions in vitro(2022-04-23) ALKAN, ELİF; YILMAZ ATALI, PINAR; TAĞTEKİN, DİLEK; SARIALİOĞLU GÜNGÖR A., DALKILIÇ E., ALKAN E., YILMAZ ATALI P., TAĞTEKİN D.Aim: Disruption of the demineralization–remineralization balance could activate the development of initial enamel lesions. Extrinsic assistance is needed to remineralize enamel lesions. The aim of this study was to evaluate the efects of fuoride varnish, enamel matrix proteins derivative, and experimental bioactive glass (BAG) on remineralization of initial enamel lesions in vitro. Materials and Methods: Artifcial initial caries lesions were developed on ffty human enamel samples using demineralization solution (pH 4.5, 37°C, 96 hours). Samples were randomly assigned to 5 groups (n=10): I-Fluoride varnish (Enamelast), II-Experimental BAG + 37% phosphoric acid (PA), III-Enamel matrix proteins derivative (EMPD, Emdogain) +Ethylenediamine-Tetraacetic-Acid (EDTA), IVEMPD+37% PA, V-Control (untreated). All remineralization agents were applied with pH cycling for 7 days. The samples were scanned by optical coherence tomography (OCT) at baseline, demineralization, and after pH cycling. Lesion depths were measured using image analysis software (ImageJ). Lesions were evaluated using surface microhardness (SMH) and two fuorescence methods (FluoreCam® and DIAGNOdent Pen (DDPen)). The data were statistically analyzed by Kruskal Wallis, Friedman, and Wilcoxon tests (p<0.05). Results: According to OCT results, fuoride varnish was found to be the most efective agent in reducing lesion depth (p=0.005). Depending on SMH results, all agents increased the surface hardness values after pH cycling. No signifcant diference was found among fuoride varnish, BAG, and EMPD+PA groups. And these microhardness values were signifcantly higher than EMPD+EDTA and control groups (p<0.001). According to the DDPen score criteria, all groups showed lower scores compared with the control group (p<0.001), however, Clinical Oral Investigations (2022) 26:7299–7348 7317 1 3 no signifcant diference was found among the remineralization agent groups. In FluoreCam assessment, size and intensity values of all treated groups showed improvement. However, there was no signifcant diference between the treatment groups in terms of FluoreCam-size measurements (p=0.186). Conclusion: BAG and EMPD+PA has a remineralization capacity as much as fuoride varnish. EMPD+PA showed better microhardness and lesion intensity results than EMPD+EDTA.Publication Open Access Tarihi geçmiş kompozit rezinleri kullanmak mümkün mü? : Ftır analizi(2023-02-01) DOĞU KAYA, BENGÜ; ŞENOL, AYŞE ASLI; KORKUT, BORA; TARÇIN, BİLGE; YILMAZ ATALI, PINAR; ÖZMEN, SEDA; Özmen S., Doğu Kaya B., Şenol A. A., Korkut B., Tarçın B., Yılmaz Atalı P.Bu çalışmanın amacı; son kullanma tarihleri 1 yıl, 2 yıl ve 3 yıl geçmiş rezin kompozitlerin (RK) dönüşüm derecelerini karşılaştırarak kullanımlarındaki güven aralığını değerlendirmektir. Materyal ve Metod: Üç farklı RK'den (Herculite XRV-Ultra A2-dentin, son kullanma tarihi 3 yıl ve 1 yıl geçmiş; Herculite Classic A2, son kullanma tarihi 2 yıl geçmiş; Kerr) 9 adet disk (8 x2 mm) hazırlandı (n=3). RK silikon kalıplara yerleştirildi, her iki tarafı şeffaf bantlar ile kapatıldı ve LED ışıklı cihaz ile (Valo, Ultradent) ile 20 sn parmak basıncı altında polimerizasyonu takiben numuneler 37°C'de 24 saat distile suda bekletildi. Dönüşüm derecesini (%DC) belirlemek için Fourier Dönüşümü Kızılötesi Spektrometre (FT-IR, JASCO) ile örnekleme kullanılarak polimerize olmuş ve olmamış kompozitler üzerinde spektral analizler yapıldı. Ortaya çıkan FT-IR spektrumu, 20 °C ortam sıcaklığında 4000–400 cm-1 spektral aralığında kaydedildi; kullanılan çözünürlük dört tarama ile 4 cm-1 ’dir. Veriler SPSS (SPSS Inc.) ile tek yönlü varyans analizi (ANOVA) ve Tukey testleri kullanılarak analiz edildi. Anlamlılık düzeyi p<0,05 olarak alındı. Bulgular: En yüksek ortalama %DC, 1 yıllık son kullanma tarihi geçmiş RK grubu için kaydedilirken (H-6: 68,80 ± 4,544), bunu 2 yıllık son kullanma tarihi geçmiş RK grubu (H- 12: 68,268 ± 2,695) takip etmiştir. En düşük ortalama %DC 3 yıl üstü RK grubu için kaydedilmiştir (H-24: 68.032 ± 4.641). Üç grup arasında %DC değerleri açısından istatistiksel olarak anlamlı bir fark bulunmadı (P=0,096). Sonuç: Bu çalışmanın sınırları dahilinde; son kullanma tarihleri üzerinden 1, 2 ve 3 yıl geçmiş kompozitler benzer %DC sonuçları gösterdi. Klinisyenlerin, üreticiler tarafından önerilen son kullanım tarihi talimatlarını takip etmeleri gerekmektedir.Publication Open Access Effect of Chlorhexidine Treatment on Microleakage of Glass Ionomer, Giomer and Methacrylate-Based Composite Restorations in Class V Cavities(2024-04-01) ŞENOL, AYŞE ASLI; TARÇIN, BİLGE; YILMAZ ATALI, PINAR; Şenol A. A., Özmen S., Karabulut Gençer B., Tarçın B., Yılmaz Atalı P.Purpose: The aim of this in vitro study was to evaluate the effects of three restorative materials and chlorhexidine digluconate (CHX) pretreatment on microleakage in Class V cavities. Materials and Methods: Thirty freshly extracted sound human molars were cleaned and stored in distilled water. Sixty standard Class V cavities were prepared on gingival 1/3 of buccal and lingual surfaces of each tooth. Teeth were randomly assigned into 3 groups corresponding to the selected restorative material (Fuji II LC Capsule/FC, GC; Beautifil Flow Plus/BF, Shofu; and GrandioSo Flow/GF, VOCO). Lingual cavities were pre-treated with CHX (Cavity Cleanser, Bisco). The cavities were restored according to manufacturer’s instructions using the materials’ own adhesive systems. Teeth were stored in distilled water (24°C) for 6 months for aging. Specimens were immersed in 2% methylene blue solution for 1 h and sectioned longitudinally in buccolingual direction. Occlusal/gingival margins were examined for dye penetration and scored under x8 and x20 magnification using stereomicroscope (Leica MZ7.5, Leica Microsystems). Statistical analysis was performed using chi-square test with a significance level of p<0.05. Results: There was no statistically significant difference between the amount of microleakage of GF, FC and BF restorations in CHX-treated and untreated cavities (p>0.05). CHX pretreatment did not result in a significant difference between microleakage values in gingival and occlusal margins of cavities restored with different materials (p>0.05). Conclusions: Application of CHX as cavity cleaner has no effect on the microleakage in Class V cavities restored with giomer, glass ionomer, and resin composites. Key words: chlorhexidine gluconate; composite resin; glass ionomer; microleakagePublication Metadata only Effect of polymerization on the color of resin composites(2022-09-01) KORKUT, BORA; YILMAZ ATALI, PINAR; TARÇIN, BİLGE; GÖÇMEN, GÖKHAN; KORKUT B., Dokumacigil G., Murat N., YILMAZ ATALI P., TARÇIN B., GÖÇMEN G.©Operative Dentistry, 2022.OBJECTIVES: The initial shade of a resin-based restorative material should be the same as that after polymerization. In this study, the color changes of translucent and opaque composites from nine different brands were assessed after polymerization using a spectrophotometer and cross-polarization (CP) photography. METHODS AND MATERIALS: Thirteen nano-hybrid (Essentia LE, GC Corp; Ceram.x Duo SphereTEC A2E/A2D, Dentsply Sirona; Harmonize A2E/A2D, Kerr Dental; IPS Empress Direct A2E/A2D, Ivoclar Vivadent; Mosaic EN/A2, Ultradent Products; Clearfil Majesty Es-2 A2E/A2D, Kuraray Noritake; Charisma Topaz A2/OL, Kulzer), two supra nano-hybrid (Estelite Asteria NE/A2B; Tokuyama), two nano-filled (Filtek Ultimate A2E/A2D; 3M) light-curing resin composites, and one micro-hybrid (Essentia MD, GC Corp) light-curing resin composite were tested. Disc-shaped specimens (n=5) were prepared using silicone molds (12 × 5 mm) and polymerized from both sides using an LED curing light (Elipar Deepcure S, 3M) at a light intensity of 1470 mW/cm2. Measurements were performed before and 1 day after polymerization using a contact-type dental spectrophotometer (Easy Shade 5, VITA Zahnfabrik, Bad Säckingen, Germany) and a combination of CP photography and Photoshop CC software (Adobe Inc, San Jose, CA, USA). Spectrophotometry and CP photography ΔE* values were calculated; the perceptibility threshold was a ΔE* value of 1.2. VITA spectrophotometry color change scores were also calculated and evaluated. RESULTS: The overall ΔE* values ranged between 0.34 and 12.56. Two-way analysis of variance (ANOVA) showed that color change was associated most strongly with composite brand (p<0.001), followed by shade (p=0.002). Color change (p=0.002) and degree of darkening/lightening (p<0.001) were significantly greater for dentin compared to enamel shades. Clearfil Majesty Es-2 (Kuraray Noritake) showed significant lightening, whereas all other composites showed darkening after polymerization. All composite brands presented perceptible (ΔE*≥1.2) color changes. Estelite Asteria (Tokuyama), Ceram.x Duo SphereTEC (Dentsply Sirona), and Harmonize (Kerr Dental) were considered the most reliable brands regardless of the shade. The spectrophotometry and CP photography methods were positively correlated (p<0.001). Also, CIEDE2000 and CIELCH (also referred to as CIE L*c*h) color systems were positively correlated based on the ΔE* values (p<0.001). CONCLUSIONS: Despite improvements in the chemical composition of, and fillers for, contemporary resin-based composites (RBCs), all tested composite brands showed perceptible color change after polymerization, except for some shades. Under the conditions in this study, it is preferable to polymerize the composite during the trial phase, before identifying the most appropriate shade. CP photography in combination with Photoshop analysis appears to be a reliable and promising approach for color evaluation.