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TAĞTEKİN, DİLEK

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TAĞTEKİN

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DİLEK

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    Empress II onlays
    (2012-01-01) TAĞTEKİN, DİLEK; SAZAK ÖVEÇOĞLU, HESNA; YANIKOĞLU F., özyöney g., Özyöney N., TAĞTEKİN D., SAZAK ÖVEÇOĞLU H., Gunday m.
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    Assessment of toothpastes through simulated-brushing for surface-roughness and reversing-back composite-discoloration
    (2023-07-03) MEŞELİ, SİMGE; ALKAN, ELİF; KORKUT, BORA; TAĞTEKİN, DİLEK; MEŞELİ S., ALKAN E., KORKUT B., TAĞTEKİN D., YANIKOĞLU F.
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    Surface Alterations of Resin Composites: Press-on-Force-Guided Brushing Simulator with Calcium-Active Whitening- Toothpastes
    (2023-07-03) SEVER, DENİZ MELTEM; DOĞU KAYA, BENGÜ; MANAV, AYBİKE; ALKAN, ELİF; YILMAZ ATALI, PINAR; KORKUT, BORA; TAĞTEKİN, DİLEK; SEVER D. M., DOĞU KAYA B., MANAV ÖZEN A., Öztürk S., ALKAN E., YILMAZ ATALI P., KORKUT B., TAĞTEKİN D.
    Introduction: The purpose was to investigate the surface roughness and the color changes of nanohybrid and microhybrid resin composites subjected to calcium active whitening toothpastes with different RDA values through a novel Press-on Force-Guided (PFG) Brushing Simulator. Material and Methods: Twenty-eight disc-shape samples (10x2mm) of a nanohybrid (Herculite, Kerr) and a microhybrid (Z250, 3M) composites were prepared and randomly divided into 4 subgroups (n=7). The samples were polymerized with a LED-curing unit with an irradiance of 1000 mW/cm2 (Valo Cordless, Ultradent). Finishing and polishing procedures were performed with 2 fine grits of Sof-Lex Discs (3M). Samples were stored in distilled water at 37°C for 24 hours. Composite samples were brushed with a medium-bristle toothbrush (ROCS Pro 5940, ROCS) using the PFG brushing simulator (Marmara University, Turkey) for 60.000 strokes (correspondence to 6 years clinically) in a slurry containing toothpaste with 120 RDA (Ca Active Whitening, ROCS) and 70 RDA (Electro Whitening, ROCS) under 300-320g load (200 strokes/min). In particular, surface roughness (Ra) and color change (ΔE) were investigated utilizing profilometer (MarSurf PS 10, Mahr) and spectrophotometer (Easy-Shade-5, VITA). Analysis of variance was used for repeated measurements; Bonferroni test was used for pairwise comparisons. The level of significance was set at p<0.05. Results: After brushing Ra values did not show a significant difference (p>0.05) except Herculite group brushed with Electro whitening (p=0.05) which showed the most roughness change (36.99%). There is a significant difference between Herculite (1.163±0.701) and Z250 (0.400±0.154) in Ra values after electro-whitening brushing (p=0.002). No significant color change was observed in any group, regardless of composite or tooth-paste type (p>0.05). ΔE values of Herculite (1.007±0.463; 1.100±0.452) and Z250 (1.558±0.618; 1.196±0.835) brushed with Ca Active Whitening and Electro Whitening toothpastes were less than 1.8 respectively. Conclusion: Tooth brushing with Ca active whitening toothpastes (different RDA values) affected differently on the surface roughness of Herculite and Z250 due to their filler and resin composition, but there is no effect on color. Keywords: brushing simulator, resin composite, whitening toothpaste, surface roughness, color change
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    Kenevir esaslı bitkisel diş macununun başlangıç mine çürükleri üzerine remineralizasyon etkisinin değerlendirilmesi
    (2022-05-20) ALKAN, ELİF; TAĞTEKİN, DİLEK; ALKAN E., TAĞTEKİN D., KORKMAZ N.
    Bu çalışmanın amacı başlangıç çürük lezyonlarının tedavisinde zencefil-bal ve kenevir içerikli bitkisel diş macunlarının etkinliğini geleneksel diş macunlarıyla kıyaslayarak değerlendirmektir. Çalışmada 60 adet sağlam mine örneği üzerinde çalkalamalı inkübatörde demineralizasyon solüsyonu (pH=4,5) kullanılarak başlangıç çürük lezyonları oluşturulmuştur (72 saat, 37⁰C, 60 rpm). Mine örnekleri 5 gruba (n=12) ayrılmıştır. Birinci gruba zencefil-bal içerikli bitkisel diş macunu Gumgumix (G) (Beka İlaç, Türkiye), ikinci gruba kenevir içerikli deneysel diş macunu (K) (SPC Kozmetik, Türkiye), üçüncü gruba kenevir yağı (KY), dördüncü gruba Sensodyne Onarım ve Koruma diş macunu (S) (GSK, İrlanda) 7 gün boyunca pH siklus modeli kullanılarak uygulanmıştır. Beşinci grup kontrol grubu olup herhangi bir tedavi uygulanmamıştır. Her grupta remineralizasyon ajanları 2 dakika diş yüzeyinde bekletildikten sonra 1 dakika boyunca şarjlı diş fırçası ile uygulanmıştır (Oral-B Test Drive (Genius) şarjlı diş fırçası, Almanya). Başlangıç, demineralizasyon ve remineralizasyon sonrası mine örnekleri; mikrosertlik, FluoreCam, DIAGNOdent Pen ve ultrason cihazları ile değerlendirilmiştir ve örneklerin taramalı elektron mikroskobu görüntüleri alınmıştır. Çalışma verileri ANOVA, Kruskal Wallis H ve Friedman testleri ile istatistiksel olarak analiz edilmiştir (p<0.05). Kenevir yağı dışındaki tüm tedavi gruplarında floresans, ultrason ve mikrosertlik değerlendirmeleri sonucu benzer remineralizasyon etkisi görülmüştür (p<0.01). Tedavi sonrası mikrosertlik verileri G (294.75 ± 8.88), S (290.5 ± 9.63), ve K gruplarında (286.92 ± 11.86) KY grubuna (238.58 ± 10.01) kıyasla anlamlı derecede yüksek bulunmuştur (p<0.001). FluoreCam size verilerine göre S (-1,85), G (-1,67) ve K (-1,2) gruplarında lezyon büyüklüğünde azalma görülürken KY grubunda (0,62) artış görülmüştür. En yüksek mineral artışı K grubunda (8.79) görülürken tüm tedavi gruplarında mineral artışı kontrol grubuyla anlamlı derecede fazla bulunmuştur (p<0.001). DIAGNOdent Pen verilerine göre G (-10.42 ± 1.38), S (-8.83 ± 1.34), ve K gruplarındaki (-8.42 ± 1.16) mineral artışı, KY grubuna (-4.33 ± 1.92) kıyasla anlamlı derecede fazla bulunmuştur (p<0.001). Ultrason verilerine göre göre S (0.19 ± 0.29), G (0.11 ± 0.01) ve K gruplarında (0.1 ± 0.01) lezyonda iyileşme görülürken KY grubunda (0.03 ± 0.01) daha az iyileşme görülmüştür (p<0.001). Çalışma sonuçlarına göre, bitkisel içerikli diş macunları (K ve G) mine remineralizasyonunda geleneksel diş macunlarına (S) benzer olumlu etki göstermiştir.
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    PublicationOpen 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.
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    Çürük ve dental plak yönetiminde görüntüleme sistemleri
    (2022-09-07) TAĞTEKİN, DİLEK; TAĞTEKİN D.
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    PublicationOpen Access
    Comparison of two different intraoral scanners for determination of caries related volume loss in caries removal
    (2023-08-01) ALKAN, ELİF; TAĞTEKİN, DİLEK; KORKUT, BORA; ŞEKER M., ALKAN E., TAĞTEKİN D., KORKUT B., YANIKOĞLU F.
    Objective: This study aims to evaluate the centering ability and canal transportation of the ProTaper Next, One Curve, and TruNatomy instruments in curved root canals. Methods: Forty-five curved mesiobuccal canals of human mandibular molar teeth were selected, randomly divided into 3 groups, and prepared using the ProTaper Next, One Curve, and TruNatomy files. Cone Beam Computed Tomography images of the cross-sectional planes at 1 mm, 3 mm, 5 mm, and 7 mm from the apical foramen were determined before and after the preparation. For each specified millimeter canal transportation and centering ability were measured. Statistical analysis was performed and compared all groups. Results: No significant differences were observed between the groups or root canal levels in both canal transportation and centering ability (p > 0.05). Conclusion: The TruNatomy system demonstrated comparable results with both predecessor ProTaper Next and One Curve single-file systems.
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    PublicationOpen Access
    Shear bond strength of composite resin cements to ceramics
    (2013-01-01) TAĞTEKİN, DİLEK; Ozyoney G., YANIKOĞLU F., TAĞTEKİN D., Özyöney N., Öksüz M.
    Objectives. The authors investigated the use of ceramic primers combined with self-adhesive resin composite cements on the shear bond strength (SBS) to zirconia and compared them with one conventional resin composite cement. Methods. The authors divided zirconia substrates (N = 550) into three groups: RelyX Unicem Aplicap self-adhesive universal resin composite cement (3M ESPE, St. Paul, Minn.) (group A) (n = 220); G-CEM Capsule selfadhesive resin composite cement (GC Europe, Leuven, Belgium) (group B) (n = 220); and Panavia 21 with Clearfil Porcelain Bond Activator and Clearfil SE Bond primer (n = 110) (Kuraray Dental, Tokyo) used as a standard comparison (SC). The authors examined the self-adhesive resin composite cements without (0) and with (1) the use of a ceramic primer. They measured SBS initially (37°C for three hours), after water storage (37°C for one, four, nine, 16 or 25 days) and after thermal cycling (5°C and 55°C for 1,500, 6,000, 13,500, 24,000 or 37,500 cycles). The authors analyzed data by using descriptive statistics, the Mann-Whitney test, the Kruskal-Wallis test and a c2 test. Results. Application of a ceramic primer did not result in a negative impact on SBS. Specimens in the A1 group (that is, RelyX Unicem Aplicap with ceramic primer) exhibited significantly higher SBS before and after water storage and thermal cycling compared with specimens that were not treated with a primer. The self-adhesive resin composite cements combined with ceramic primer exhibited similar or higher SBS values compared with those in the SC group at each aging duration (that is, water storage and thermal cycling). With respect to G-CEM Capsule, the authors observed a significantly positive effect of the primer after nine and 16 days’ water storage and after one and four days’ thermal cycling. They observed predominantly adhesive failures. Conclusions. Ceramic primer in combination with self-adhesive resin composite cement demonstrated a positive effect on SBS to zirconia and should be used for cementation. Practical Implications. Long-term adhesion to ceramic plays an important role in the longevity of dental restorations. Therefore, the authors recommend that clinicians use a ceramic primer when cementing zirconia restorations.
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    Servikal bölgede başlangıç çürük lezyonu bulunan dişlerin minimal İnvaziv yöntemlerle estetik rehabilitasyonu: vaka sunumu
    (2022-10-01) BİLGİN GÖÇMEN, GÜLÇİN; TAĞTEKİN, DİLEK; KARALTI C. M., BİLGİN GÖÇMEN G., TAĞTEKİN D.
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    Fissür örtücü materyallerin asit atağı ve fırçalama sonrası aşınma direnci ve yüzey özelliklerinin değerlendirilmesi
    (2023-12-09) ALKAN, ELİF; TAĞTEKİN, DİLEK; KORKUT, BORA; OĞRAK, İBRAHİM HALİL; ALKAN E., AKDOĞAN M. C., TAĞTEKİN D., KORKUT B., OĞRAK İ. H., ERDİL V. Ö., ÜNAL Ş. T.