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Öğe The effect of desensitizing toothpastes and coffee staining on the optical properties of natural teeth and microhybrid resin composites: An in-vitro study(Hindawi Ltd, 2018) Turgut, Sedanur; Kılınç, Hamiyet; Ulusoy, Kıvanç Utku; Bağış, BoraObjective. To evaluate the effect of different desensitizing toothpastes and coffee staining on the discoloration rate of natural human tooth and composite materials. Materials and Methods. A total of 56 human teeth and 56 composite specimens were used. After initial color measurements were taken, specimens and teeth were exposed to simulated toothbrushing with six desensitizing toothpastes containing different active ingredients: stannous fluoride, strontium acetate, potassium citrate and hydroxyapatite, cetylpyridinium chloride, arginine, and novamin. Specimens were then exposed to coffee staining. Throughout the staining procedure, the storing solution was refreshed every day and the specimens were brushed with the tested toothpastes. Color measurements and changes were recorded at each stage and analyzed with one-way ANOVA, Dunnett tests, and paired sample t-test (p<0.05). Results. The largest color change was obtained with the stannous fluoride toothpaste after coffee staining for natural teeth (2.6 E00?) and composite specimens (3.1 E00?). Coffee staining resulted in significant changes for E00? values of all groups, except for natural teeth brushed with a novamin-based (p= 0.06) toothpaste. For composite specimens, only the stannous fluoride and cetylpyridinium chloride-based toothpastes resulted in significant color changes relative to the control group. L? and b? values were also increased after staining for all groups (p<0.05). Conclusions. Desensitizing toothpastes alone did not cause perceptible color changes; however, in combination with coffee staining, it tended to increased discoloration for both composites and natural teeth.Öğe Effect of UV aging on translucency of currently used esthetic CAD-CAM materials(Wiley, 2019) Turgut, Sedanur; Kılınç, Hamiyet; Bağış, BoraObjectives To evaluate the relative translucency parameter (RTP) values of computer-aided design (CAD)-computer-aided manufacturing (CAM) materials after UV aging. Materials and methods 70 specimens (n = 10) of Bruxzir Anterior (BA); E.max Cad (EC); Lava Ultimate (LU); Cerasmart (CE); Vita Enamic (VE); Vita Suprinity (VS); Vita Mark II (VM) were prepared (1 mm +/- 0.01 mm). Color measurements were performed using a spectrofotometer (VITA Easyshade). RTP values of the specimens before (RTP1) and after UV aging (RTP2) were evaluated. Statistical analyses were done with repeated measurements of two-way-ANOVA with Bonferroni test (P < 0.05). Results Evaluating RTP1 and RTP2 values; significant differences were found (P < 0.05). There were no significant difference between the RTP1 values of CE and VS (P = 0.779); EC and VM (P = 0.952); VM and LU (P = 0.995); EP and LU (P = 0.653). Evaluating RTP2 values; VE and BA were found significantly different from the others (P < 0.05). For all evaluated groups TP values decreased after UV aging (P < 0.05). The most RTP reduction was observed for LU; while VM and EC were less affected. Conclusion Glass ceramic VE showed the highest RTP and zirconia-based BA was the most opaque restorative CAD-CAM material. UV aging caused the CAD-CAM materials get more opaque. Clinical significance In cases where translucency is needed chosing VE would give better esthetic results; while zirconia-based BA should be used if more opaque restoration is needed. Clinicians should be aware of that restorations get more opaque after usage.Öğe Farklı Dayanak Materyallerinin İmplant Destekli Tam Seramik Restorasyonların Final Rengine Etkilerinin Değerlendirilmesi(2020) Kilinç, Hamiyet; Şanal, Fatma Ayşe; Turgut, SedanurAmaç: Bu çalışmanın amacı, farklı implant dayanak materyallerinin, implant destekli tam seramik restorasyonların final rengine etkilerini değerlendirmektir. Gereç ve Yöntemler: Disk şeklinde (10×1,5mm) 30 adet titanyum (TiFast Titanium) ve 10 adet zirkonya (BruxZir® Solid Zirconia, renk A2) örnek farklı implant dayanak tiplerinitemsil etmek üzere üretildi ve 4 adet dayanak grubu (n=10) oluşturuldu;Grup T: Titanyum, Grup OP: Opak uygulanmış titanyum, Grup AS:Anodize sarı titanyum ve Grup Z: Zirkonya dayanak (kontrol). A2 renginde 10 adet disk şeklinde (10×0,2 mm) siman örneği (RelyX™ Unicem) hazırlandı. Monolitik zirkonya materyali (BruxZir® AnteriorWhite) kullanılarak 40 adet restorasyon örneği (10×1 mm) üretildi. Dayanak, siman ve restorasyon örnekleri kullanılarak oluşturulan kuronkonfigürasyonlarının CIE L*, a*, b* renk değerleri bir spektrofotometreyardımıyla ölçüldü. Kontrol ve test grupları arasındaki renk farklılıkları(?E*) hesaplanarak, veriler tek yönlü varyans analizi (ANOVA) veTukey HSD testi kullanılarak p?,05 anlamlılık düzeyinde değerlendirildi. Bulgular: Gruplardan elde edilen L*, a*, b* parametreleri ve ?E*değerleri arasında anlamlı farklılıklar tespit edilmiştir (p?0,001). GrupT’de, diğer gruplara kıyasla anlamlı derecede düşük L* ve b* değerielde edilmiştir. En yüksek ortalama ?E* değeri Grup T’de (?E*=5,01)elde edilirken, onu sırasıyla Grup OP (?E*=2,44) ve Grup AS(?E*=1,75) izlemiştir. Sonuç: Anodize sarı ve opak uygulanmış titanyum dayanak konfigürasyonları ile oluşan restorasyon final rengi, klinik olarak kabul edilebilir seviyededir. Opak uygulanmamış titanyumgrubu ise istatistiksel olarak anlamlı en yüksek renk değişimi ile sonuçlanmış ve klinik kabul edilebilirlik eşiğini aşmıştır.Öğe MONOLİTİK ZİRKONYA RESTORASYONLARIN SONUÇ RENK VE TRANSLUSENSİ ÖZELLİKLERİNE FARKLI TİP YAPIŞTIRMA SİMANLARININ ETKİSİ(2021) Turgut, Sedanur; Kilinç, Hamiyet; Ayaz, Elif Aydoğan; Bağiş, BoraAmaç: Bu çalışmanın amacı; farklı yapıştırma simanlarının monolitik zirkonyanın optik özelliklerine etkisini in vitro olarakincelemektir.Gereç ve yöntemler: 50 adet disk şeklinde örnek (1mmx10mm) CAD/CAM sistemiyle monolitik zirkonyadan hazırlandı ve 5deneysel gruba ayrıldı (n=10). Grup C (kontrol) için: simantasyon işlemi yapılmadı; Grup RS için: rezin siman; Grup RCI için:rezin modifiye cam iyonomer siman; Grup CI için: cam iyonomer siman ve Grup PS için: polikarboksilat siman 0.1 mm kalınlıktauygulandı. Beyaz ve siyah zemin üzerinde, CIE L*a*b* değerleri kolorimetre cihazı kullanılarak kaydedildi. TranslusensiParametresi (TP) ve simantasyon sonrası oluşabilecek renk değişiklikleri (?E*00) hesaplandı. İstatistiksel analiz için tek yönlüvaryans analizi (ANOVA) ve Tukey HSD testi kullanıldı (p<0,05).Bulgular: Gruplar arasında L*, a*, b* ve TP değerlerinde anlamlı farklılıklar görüldü (p<0,05). En yüksek L*(87,6±1,6),a*(0,2±0,1) ve b*(15,3±0,2) Grup PS‘de; en düşük L*(83,1±1,3), b*(13,0±0,3) değerleri Grup C’de; en düşük a*(-1,6±0,3)değeri Grup CI’de gözlemlendi. Grup RS ve Grup CI a*(p=0,792) ve b*(p=0,804) değerleri arasında fark bulunmadı. Simantasyon işlemi tüm gruplarda TP’de azalmaya neden oldu (p<0,05). En yüksek TP (14,2) Grup C’de; en düşük TP (12,0) Grup PS’ degörüldü. ?E*00 en düşük Grup RCI-Grup C (1,8 ?E*00) ve en yüksek Grup PS-Grup C arasında (2,9 ?E*00) bulundu (p<0,05).Sonuç: Simantasyon işlemi monolitik zirkonya örneklerde ‘kabul edilir’ eşik düzeyinin üzerinde renk değişimi ve TP değerindeazalmaya neden oldu. TP değerlerindeki azalma her siman tipi için farklı bulundu. Monolitik zirkonya restorasyonlarda seçileceksimanın, restorasyonun optik özelliklerini değiştirebileceği ihtimali göz önünde bulundurulmalıdır.Öğe Optical behaviors of esthetic CAD-CAM restorations after different surface finishing and polishing procedures and UV aging: an in vitro study(Mosby-Elsevier, 2018) Kılınç, Hamiyet; Turgut, SedanurStatement of problem. Esthetic computer-aided design and computer-aided manufacturing (CAD CAM) materials have various chemical compositions and can be prepared by using different finishing and polishing procedures. Their optical properties may change over time, depending on these factors. However, information about their stain resistance is still scarce. Purpose. The purpose of this in vitro study was to evaluate the optical properties of esthetic CAD CAM materials after different finishing and polishing procedures and ultraviolet (UV) aging. Material and methods. Lava Ultimate, Cerasmart, Vita Enamic, Vita Suprinity, and Vita Mark II materials were used. A total of 150 specimens (14x12x1 mm) were prepared (n=10). A spectrophotometer was used to measure color parameters after different finishing and polishing procedures (control, manual polishing, glazing) and ultraviolet (UV) aging. Lightness (L*), green-red (a*), blue-yellow (b*), chroma (Ch), and hue (h) parameters were recorded, and change in lightness (Delta E*) values were calculated. Statistical analyses were performed with 2-way ANOVA, the Fisher least significant difference test, and the paired samples t test (alpha=.05). Results. Significant interactions were noted between the aging conditions, material type, and finishing and polishing procedures for all evaluated parameters (P<.001). Vita Suprinity and Vita Mark II glazing groups resulted in significantly higher L-1* values (P<.05) after the first color measurements. The b(1)* and C-1 values of Vita Suprinity were higher than for other materials (P<.05). The highest Delta E* value was observed in the Lava Ultimate-glazing group (Delta E*=2.7) and the lowest in the Vita Mark II-control group (Delta E*=0.86). Conclusions. The optical properties of CAD-CAM materials can be affected by the material type and the applied surface finishing and polishing procedure. Manual polishing seems to be a better choice for Lava Ultimate and Cerasmart and glazing for Vita Enamic. For ceramic materials, manual polishing or glazing can be recommended in terms of color stability.Öğe Shear bond strengths of aged and non-aged CAD/CAM materials after different surface treatments(Korean Acad Prosthodontics, 2020) Kılınç, Hamiyet; Şanal, Fatma Ayşe; Turgut, SedanurPURPOSE. To assess shear bond strengths (SBS) of resin composites on aged and non-aged prosthetic materials with various surface treatments. MATERIALS AND METHODS. Cerasmart (CE), Vita Enamic (VF.), Vita Mark II (VM), and IPS e.max CAD (EC) blocks were sliced, and rectangular-shaped specimens (14 x 12 x 1.5 mm; N = 352) were obtained. Half of the specimens were aged (5000 thermal cycles) for each material. Non-aged and aged specimens were divided into 4 groups according to the surface treatments (control, air abrasion, etching, and laser irradiation; n = 11) and processed for scanning electron microscopy (SEM). The repair procedure was performed after the surface treatments. SBS values and failure types were determined. Obtained data were statistically analyzed (P<.05). RESULTS. The material type, surface treatment type, and their interactions were found significant with regard to SBS (P<.001). Aging also had a significant effect on prosthetic material-resin composite bonding (P<.001). SBS values of non-aged specimens ranged from 12.16 to 17.91 MPa, while SBS values of aged specimens ranged from 9.46 to 15.61 MPa. Non-aged VM in combination with acid etching presented the highest score while the control group of aged CE showed the lowest. CONCLUSION. Etching was more effective in achieving durable SBS for VM and EC. Laser irradiation could be considered as an alternative surface treatment method to air abrasion for all tested materials. Aging had significant effect on SBS values generated between tested materials and resin composite.
