A comparative study of polishing systems on optical properties and surface roughness of additively manufactured and conventional resin based composites
ayşe tuğba ertürk avunduk | sevim atılan yavuz | hande filiz | Cengiz Yanardag, Esra
This study aimed to compare polishing systems on color stability, surface roughness, and gloss of additively manufactured permanent and conventional resin composites. Totally 250 disc specimens (6 mm*2 mm) were prepared from resin-based materials [G-ænial Posterior (GP), Clearfil Majesty Esthetic (CME), SonicFill-2 (SF), Tescera (Tes), and Crowntec (CT)]. Following baseline color (ΔE00), gloss (GU), and surface roughness (Ra) measurements, the specimens were randomly divided into 5 groups (n= 10/group) according to polishing systems: Control (mylar strips); OneGloss; OneGloss + Platina Hi-Gloss; OptiDisc; and OptiDisc + Platina Hi-Gloss. Specimens were immersed in coffee for 144 h following polishing. ΔE00, GU, and Ra measurements were repeated. Atomic force microscopy images were taken in...
Long-term effect of diode laser irradiation compared to sodium fluoride varnish in the treatment of dentine hypersensitivity in periodontal maintenance patients: a randomized controlled clinical study
Cengiz Yanardag, Esra
Objective: The aim of this clinical study was to evaluate and compare the desensitizing effects of a gallium?aluminum?arsenide (GaAlAs) laser and sodium fluoride (NaF) varnish on dentine hypersensitivity (DH) in periodontal maintenance patients. Background data: The use of lasers opens a new dimension in the treatment of DH. Methods: Forty-eight patients with 244 teeth affected by DH were included in the trial. To be included in the study, the subjects had to have 4 or more hypersensitive teeth at different quadrants. Selected teeth were randomly assigned to a GaAlAs laser group, placebo laser group, NaF varnish group, or a placebo NaF varnish group. Laser therapy was performed at 8.5?J/cm(2) energy density. In the placebo laser group, the same laser without laser emission was used. In the...
The effect of home-bleaching application on the color and translucency of five resin composites
Cengiz Yanardag, Esra
Objectives: The aim of this study was to investigate the effect of home bleaching agents on the color and translucency of resin composites. Methods: Thirty disc shaped specimens (1mm thick) were fabricated from each resin composite (Reflexions, Grandio, Gradia Direct, Clearfil Majesty Esthetic, Ceram-X Mono) and divided into 3 subgroups as carbamide peroxide (CP, Opalescence 10% PF), hydrogen peroxide (HP, 10% Opalescence Treswhite Supreme) and control group (n=10). Baseline CIE L*a*b* color coordinates were measured with spectrophotometer and translucency parameters (TP) were calculated. CP and HP groups were treated with bleaching agents according to manufacturers' instructions and control group was stored in distilled water (DW) for 14 days. Color and translucency measurements were...
The effect of Er,Cr:YSGG laser application on the micropush-out bond strength of fiber posts to resin core material.
Cengiz Yanardag, Esra
Objective: The aim of this study was to compare the effects of erbium, chromium: yttrium, scandium, gallium, and garnet (Er,Cr:YSGG) laser application to different surface treatments on the micropush-out bond strengths between glass and quartz fiber posts and composite resin core material. Background data: Different types of lasers have been used as an alternative to airborne particle abrasion and other surface treatment methods to enhance the bond strength of dental materials. However, there is no study regarding the use of Er,Cr:YSGG laser as a surface treatment method for fiber posts in order to improve the bond strength. Materials and methods: Ninety-six quartz and 96 glass fiber posts with a coronal diameter of 1.8 mm were randomly divided into eight groups according the surface...
Farklı uygulama basamaklarında oluşan tükürük kontaminasyonunun 3 adeziv sistemin dentine bağlanma dayanımlarına etkisinin incelenmesi
Cengiz Yanardag, Esra
Amaç: Bu çalışmanın amacı, 3 farklı adeziv sistemin farklı uygulama basamaklarında oluşan tükürük kontaminasyonunun, adeziv sistemlerin dentine bağlanma dayanımları üzerine etkisini incelemektir. Gereç ve Yöntem: Yirmi dört molar dişin kullanıldığı çalışmamızda, mikro kesit alma cihazıyla her bir dişten 2 adet olmak üzere toplam 48 adet 1 mm’lik horizontal dentin kesidi elde edilmiş ve bu kesitler, test edilen adeziv sistemin tipine göre (Prime Bond NT, Clearfil SE Bond, Clearfil S3 Bond) rastgele 3 gruba ayrılmıştır. Daha sonra her adeziv sistem için biri kontrol grubu olmak üzere tükürük kontaminasyonunun olduğu aşamaya göre (adeziv öncesi, adeziv sonrası ve polimerizasyon sonrası) 4 alt grup oluşturulmuştur. Her dentin diski üzerine 3 adet 0.7 mm çapında ve 1 mm yüksekliğinde kompozi...
Use of mineral trioxide aggregate in the treatment of invasive cervical resorption: a case report
Cengiz Yanardag, Esra
Introduction: Guided tissue regeneration (GTR) is a successful treatment procedure of periodontal reconstructive surgery. Adverse effects can be observed after GTR procedure, but external root resorption is rarely reported at clinical studies. Invasive cervical resorption is a clinical term used to describe a relatively uncommon, insidious, and often aggressive form of external root resorption. Methods: The present case demonstrates an invasive cervical resorption that is a potential late complication of GTR in a maxillary canine of a 59-year-old male patient. After the surgical intervention and root canal treatment, the resorption was subsequently sealed with mineral trioxide aggregate. Results: The 1-year follow-up demonstrates no pathologic changes on clinical and radiographic examinati...
Skleroderma’lı Hastaya Multidisipliner Yaklaşım ve 2 Yıllık Takip: Olgu Raporu
Cengiz Yanardag, Esra
Skleroderma, konnektif dokunun anormal sentezi sonucunda ortaya çıkan fibrotik değişiklikler ve vasküler deformiteler ile karakterize, sebebi bilinmeyen, organ ve sistemleri tutmaya eğilimli sistemik ve kronik bir bağ dokusu hastalığıdır. Sıklıkla oral ve perioral dokuları etkileyen sklerodermanın rijit bir dil, kısıtlanmış ağız açıklığı ve kserostomi gibi karakteristik özellikleri vardır. Bu vaka raporu sınırlı bir ağız açıklığı olan sistemik sklerozis hastasına interdisipliner bir tedavi yaklaşımını sunmaktadır. Hastanın molar dişine kanal tedavisi yapılmış ve diş eksiklikleri sabit bölümlü protezlerle rehabilite edilmiştir. 2 yıllık takip sonucunda tedavilerin başarılı olduğu gözlenmiştir.
The effect of hydrogen peroxide and subsequent resveratrol application to CAD-CAM blocks on the cell viability of fibroblasts
Cengiz Yanardag, Esra
The aim is to assess viability of fibroblasts exposed to 2 CAD-CAM blocks and a nanohybrid resin after application of hydrogen peroxide (HP) and resveratrol with 2 extraction media at 24 h, 48 h, and 72 h. Eighteen specimens were obtained from Lava Ultimate (LU), Vita Enamic (VE), and Grandio (GR). Specimens of each material were divided into 3 groups (material only, bleached, resveratrol applied) for 2 extraction media as artificial saliva (AS) and phosphate buffer saline (PBS) (n = 3). For bleached group, 40% HP was applied to specimens for 20 min twice. For resveratrol group, 0.5 µM resveratrol was applied after bleaching for 10 min. Mouse fibroblast cells were exposed to extracts of each group. The viability of cells was determined with MTT assay at 24 h, 48 h, and 72 h. Cell viability...
The effect of resveratrol application on the micro-shear bond strength of adhesive to bleached enamel
Cengiz Yanardag, Esra
The aim is to investigate the effect of resveratrol on micro-shear bond strength (µSBS) of adhesive to enamel after 40% hydrogen peroxide application. For µSBS test, 50 teeth were obtained, 2/3 of crowns were embedded into acrylic resin. After application of hydrogen peroxide twice, teeth were randomly allocated to control group and 9 groups (n = 15) according to concentrations (0.5, 1, 2 µM) and application periods (10, 30, 60 min) of resveratrol. Following, composite resin was placed onto enamel surfaces using 3 tygon tubes for each tooth. µSBS test was performed and failure modes were displayed. To analyze µSBS values, Kruskal Wallis and Mann-Whitney U tests were performed. µSBS values of 1 µM resveratrol for 10 min applied group were statistically higher than control group (p < 0.05). ...
Clinical performance of clinical-visual examination, digital bitewing radiography, laser fluorescence, and near-infrared light transillumination for detection of non-cavitated proximal enamel and dentin caries
Cengiz Yanardag, Esra | TOPBAŞ KOÇAK, NAZAN
The aim of this study was to compare the clinical performance of clinical-visual examination using the International Caries Detection and Assessment System (ICDAS) II, digital bitewing radiography, near-infrared light transillumination (NIR-LT), and laser fluorescence (LF) for the detection of non-cavitated proximal enamel and dentin caries. The study included 335 patients, aged 12-18 years, with no cavities in the posterior teeth. Clinical-visual inspections of 335 non-cavitated proximal caries were performed by two examiners. For enamel caries, clinical validation included a combination of clinical-visual and digital bitewing radiography assessments. For dentin caries, the clinical validation was opening the cavity. The accuracy rate, sensitivity, specificity, predictive values, and area...
Changes in Optical Characteristics and Surface Topography of CAD/CAM Materials after Bleaching Applications: An AFM Evaluation
Cengiz Yanardag, Esra
Purpose: To evaluate the effect of in-office and at-home bleaching agents on color changes (ΔE00 ), translucency (TP00 ), whiteness (WID ), surface roughness (Ra ), and surface topography (Rsk and Rku ) of a resin nano-ceramic and a polymer-infiltrated ceramic network CAD/CAM material. Materials and methods: Sixty specimens (6 mm × 7 mm × 1.3 mm) were prepared from Lava Ultimate (LU) and Vita Enamic (VE). The specimens were divided into 6 groups according to the bleaching agents applied (n = 10/group): control, Perfect Bleach Office + (PBO), Opalescence Boost (OB), Perfect Bleach (PB) with 10% and 16% carbamide peroxide and Whiteness Perfect (WP). ΔE00 values were calculated before and after bleaching procedures with a spectrophotometer using the CIEDE2000 formula. ΔTP00 and ΔWID values w...
Microshear Bond Strength of Tri-Calcium Silicate-based Cements to Different Restorative Materials
Cengiz Yanardag, Esra
Purpose: To evaluate the microshear bond strength of tri-calcium silicate-based materials to different restorative materials. Materials and methods: Thirty-five disks of TheraCal LC and Biodentine were fabricated using teflon molds according to manufacturers' instructions. Then the specimens were randomly divided into 7 groups according to the materials applied: Fuji IX, Fuji II, Equia Fil, Vertise Flow, Filtek Bulk Fill Posterior Restorative, Filtek Z250 with Prime&Bond NT and with Clearfil SE Bond. All restorative materials were placed onto the disks using tygon tubes. Following a storage period, the specimens underwent microshear bond strength testing in a universal testing machine, and fracture modes were analyzed. Data were analyzed using one-way ANOVA and Tukey's post-ho...
Assessment of color change and surface roughness in composite resins and teeth subjected to remineralizing agents
YILDIZ, Gökçe | ERTÜRK AVUNDUK, Ayşe Tuğba | ATILAN YAVUZ, Sevim | Cengiz Yanardag, Esra
Objective: This study was conducted to determine the color change and surface roughness of a nanohybrid, a microhybrid, an indirect composite resin and human central incisor teeth after the application of fluoride varnish (FV) and casein phosphopeptide- amorphous calcium phosphate (CPP-ACP). Materials-Methods: Twenty-four specimens were fabricated from each composite material (Nova Compo C, Gradia Direct, Solidex and teeth) by using a teflon mold (7 mm diameter and 2 mm thickness). Initial (T0) color measurements were made on the non-reflective white surface of the composite resin materials (Nova Compo C, Gradia Direct, Solidex) and teeth with a spectrophotometer (Vita Easyshade V) and initial surface roughness (Ra) values were measured with a mechanical contact profilometer (Mituto...
Derin dentin çürüklerinin tedavisinde alternatif yeni yöntemler
Cengiz Yanardag, Esra
Günümüzde modern diş hekimliği kapsamında, diş dokularının maksimum oranda korunması ve fonksiyon görmesi için minimal invaziv yöntemler uygulanmaktadır. G.V. Black tarafından tanımlanmış olan geleneksel görüşe bağlı kalınarak uygulanan derin dentin çürüğü tedavilerinde tüm çürük dokunun uzaklaştırılması, pulpanın perforasyonuna dolayısıyla endodontik girişimlere ve bazı durumlarda çekime neden olabilmektedir. Dişin ağızda kalma süresi, fonksiyonu ve prognozu açısından önemli bir etken olan pulpanın vitalitesinin daha uzun süre korunabilmesi amacıyla adeziv sistemler ve restoratif materyallerdeki yeni gelişmelerle günümüzde pek çok yeni tedavi yaklaşımı ve materyal geliştirilmiştir. Bu derlemede derin dentin çürüğü varlığında çürüğün uzaklaştırılmasındaki selektif yaklaşımlar, k...
Farklı Polisaj Sistemlerinin Restoratif Materyallerin Renk Stabilitesi, Yüzey Pürüzlülüğü ve Parlaklığı Üzerine Etkisinin Değerlendirilmesi
Hande Filiz | Ayşe Tuğba Ertürk Avunduk | Cengiz Yanardag, Esra | Sevim Atılan Yavuz
Amaç: Beş farklı polisaj sisteminin restoratif materyallerin renk stabilitesi, yüzey pürüzlülüğü ve parlaklığı üzerine etksinin karşılaştırılarak değerlendirilmesidir. Yöntem: Her bir rezin kompozitten [mikro-hibrid rezin kompozit (G-ænial Posterior), bulk-fill rezin kompozit (SonicFill-2), indirekt rezin kompozit (Tescera)] 30 örnek olmak üzere toplam 150 disk şeklinde (6 mm çapında ve 2 mm kalınlığında) örnek hazırlandı. Örnekler 24 saat boyunca 37°C'de distile su içinde bekletildi. Başlangıç renk, yüzey pürüzlülüğü (Ra) ve parlaklık ölçümlerinin ardından örnekler, polisaj sistemlerine göre rastgele 5 gruba (n=10) ayrıldı: kontrol (şeffaf bant), tek aşamalı polisajsistemi (One- Gloss, Shofu), tek aşamalı polisajsistemi + polisaj patı (Platina Hi-Gloss, Prevest Denpro), çok a...
Color difference of composite resins after cementation with different shades of resin luting cement
Cengiz Yanardag, Esra
The purpose of this study was to evaluate the color difference of nanohybrid and ormocer-based composite resins with different thicknesses when 4 different shades of resin luting cement were used. 56 disc specimens of each composite resin (Aelite aesthetic enamel, Ceram-X mono) with 0.5 and 1 mm thicknesses were fabricated. Baseline color measurements were performed using a clinical spectrophotometer. The specimens of each thicknesses of each resin were randomly divided into 4 groups according to the shades of resin luting cement (white/A1, yellow/universal/A3, transparent and white opaque) (n = 7). Mixed resin cement was applied onto the resin specimens using a Teflon mold in 0.1 mm thickness. Color measurements of cemented composite resin specimens were repeated and color difference (∆E)...