Sevcan Kurtulmus-Yilmaz

• DDS PhD
• Professor (Full) at Near East University

PURPOSE The study aimed to determine the influence of implant angulation on the trueness of multi-unit implant impressions taken through different techniques and strategies. MATERIALS AND METHODS As reference models, three partially edentulous mandibular models (Model 1: No angulation; Model 2: No angulation for #33, 15-degree distal angulation fo...

Background: The information regarding the cytotoxicity of ceramic and resin-matrix ceramic materials subjected to over-the-counter bleaching agents is limited in the literature. Objectives: The aim of the present study was to investigate the cytotoxic effects of lithium disilicate ceramic (LDC), resin nano-ceramic (RNC) and nano-hybrid composite...

Purpose: To study the influence of insertion depth and implant angulation on the 3D trueness of models obtained with different impression techniques. Materials and methods: Four different reference models (model 1: parallel, depth of 1.5 mm; model 2: parallel, depth of 4 mm; model 3: 20-degree angle, depth of 1.5 mm; and model 4: 20-degree angle...

To evaluate the efficacy of Er,Cr:YSGG laser irradiation on the removal of zirconia hybrid abutment crowns (HAC) from ti-bases and investigate the effects of laser output power and zirconia generation on debonding time and fracture resistance of crowns. A hundred monolithic zirconia HACs were fabricated by using 4Y-TZP and 5Y-TZP materials and subs...

The Covid‐19 pandemic has forced all dentistry faculties to quickly shift to the online supplementation or replacement of traditional modules to pursue education. However, there is limited research evaluating the effectiveness of this education modality on student performance in dental anatomy and manipulation module. Accordingly, it was aimed to c...

During the COVID-19 pandemic, the necessity of social isolation led education to be distance-and online instead of face-to-face (F2F). Education strategies became more challenging for the educationalists at dentistry faculties, since dental education is based on mostly practical tutorials. All over the world, the faculties tried to develop policies...

Background: There is no consensus in the literature regarding the impression procedures in the presence of multiple and angulated implants. Methods: Three maxillary master models with 6 implants bilaterally positioned in anterior, premolar and molar regions were fabricated. In model 1, all implants were placed in parallel; in models 2 and 3, ant...

COVID-19 has been recognized at the end of 2019 and has been recognized in more than 215 countries with more than 24 million reported cases. Dental practitioners were regarded under high risk of getting COVID-19 due to their working environment and the mode of transmission of the virus. Present study aimed to evaluate the awareness and assessing th...

Background Patients with severely atrophied jaws can be challenging in implantology. The All-on-4 treatment concept eliminates advanced augmentation procedures in highly resorbed ridges by preserving the relevant anatomic structures. In addition, the inclination of the distal implants enables the placement of longer implants. Hence, tilting the ant...

Objective: To investigate the influence of surface treatments conducted in presintering and postsintering stages on flexural strength and optical properties of zirconia. Materials and methods: Specimens were milled from partially sintered zirconia blocks in different geometries and divided into three main groups as presintered, postsintered, and...

This study aimed to investigate the micro-shear bond strength (μSBS) of surface treated CAD-CAM materials to resin cement. The specimens obtained from IPS e.max CAD, Lava Ultimate, Cerasmart and Vita Enamic were divided according to the surface treatment method applied as: no treatment, 3W and 2W Er, Cr:YSGG laser irradiation, sandblasting and 5% h...

Polymer-infiltrated ceramic-network (PICN) material is a new type of material used for the hybrid abutments of dental implants. This study aimed to compare flexural strength, bond strengths, and fracture-resistance values of PICN with lithium disilicate ceramic (LDS) and to evaluate the effect of thermocycling on the tested parameters. Twenty speci...

Objectives: To evaluate the effects of airborne-particle abrasion (APA) and Er,Cr:YSGG laser irradiation on 4-point-flexural strength, phase transformation and morphologic changes of zirconia ceramics treated at pre-sintered or post-sintered stage. Methods: Three hundred and forty-two bar shaped zirconia specimens were milled with different size...

Purpose To evaluate the effect of different surface treatments on mechanical and optical properties of lithium disilicate ceramic (IPS e.max CAD), 2 resin nanoceramics (Lava Ultimate, GC Cerasmart), and polymer‐infiltrated ceramic network material (Vita Enamic). Materials and Methods CAD/CAM blocks were sectioned into 4 × 1 × 14 mm³ bars for three...

Purpose: The aim of this study was to evaluate the effect of implant inclination and cantilever length on the stress distribution in mandibular cortical bone, implant, abutment, prosthetic framework, and prosthetic screw via three-dimensional (3D) finite element analysis (FEA). Materials and methods: Four different finite element models (0-0, 17...

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 measureme...

The aim of this study was to investigate the effect of hydrogen peroxide (HP) and carbamide peroxide (CP) on the surface roughness of five different composite resins using profilometer and scanning electron microscope (SEM). Thirty-six specimens (1 mm thick, 10 mm in diameter) of five composite resins were fabricated. Each composite group was equal...

Objectives: This study aimed to compare the translucency characteristics of different shades of 5 composites. Methods: Seven resin discs were prepared from each composite (Grandio, Gradia Direct, Clearfil Majesty Esthetic, Ceram-X Mono, Filtek Z250) and shade (A1, A2, A3). Baseline CIE L*a*b* color coordinates of specimens were measured in a viewin...

The aim of this study was to evaluate the efficacy of Er,Cr:YSGG laser irradiation in reducing pain and on healing rate of traumatic ulcerations (TU) during a 2-week period after placement of new complete dentures. Denture-related TU are painful, and result in patient discomfort. Lasers are used in the treatment of different kinds of mucosal lesion...

Passive fitting implant supported prosthesis is the key for a successful treatment. In order to achieve a passive fit prosthesis, it is very important to get an accurate impression. Factors affecting the accuracy of such impressions include: Impression technique, splinting or not splinting the impression copings, implant angulation, the number of i...

Objective: To assess the color stability of artificial teeth after immersion in different staining solutions and to determine the effect humic acid on removing stain from teeth. Background: Old denture wearer needs effective, easy-use and safe denture-cleaning material. Material and Methods: Sixty maxillary incisors were divided into the three grou...

PURPOSE The purpose of this study was to evaluate and compare the translucency of shaded zirconia all-ceramic systems. MATERIALS AND METHODS Translucency of 3 different zirconia all-ceramic systems colored by different techniques was compared with a lithium disilicate glass-ceramic (IPS e.max Press). Square-shaped specimens with 0.5 mm thickness w...

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 use...

Objectives: The aim of this study was to evaluate the effect of implant locations on the stress around the two different attachment systems in mandibular two-implant overdentures. Materials and Methods: The data obtained from Visible Human Project were modified with the use of VRMESH and Rhinoceros 4.0 software to establish a 3D mandible model with...

Objective: To assess the staining susceptibility of four acrylic resin (Ivostar, SR Vivodent PE, Major Dent, Integral) and a nanocomposite resin (Veracia) artificial teeth and to evaluate the stain removal efficacy of denture cleansers. Materials and methods: Sixty maxillary incisors of each brand (total = 300) were divided into three groups acc...

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 carba...

Statement of problem: The effect of different proportions of recast dental alloys on the color of overlying opaque porcelain (OP) is unknown. Purpose: The purpose of this study was to compare the color of OP applied on 2 different proportions (50% and 100%) of recast alloys with the color of commercially available shade tabs of OP. Material and...

Objective: The aim of this in vitro study was to evaluate the surface roughness of human enamel bleached with 10% carbamide peroxide or 10% hydrogen peroxide bleaching agents at different times and also subjected to different superficial cleaning treatments. Materials and methods: One hundred and forty flat enamel samples were divided into 14 gr...

p> Ö ZET Amaç: Kuzey Kıbrıs Türk popülasyonunun maksiler anterior dişlerinin renklerini Vitapan Classical skalasına ve CIE L*a*b* renk sistemine göre belirleyerek, cinsiyetin renk değerleri üzerine etkisini incelemektir. Gereç ve Yöntem: Çalışmaya 18-27 yaş aralığında, 43 bayan ve 43 erkek olmak üzere toplam 86 gönüllü birey katılmıştır. Maksill...

The success of implant-supported restorations depends on the treatment planning and the transfer of planning through the surgical field. Recently, new computer-aided design and manufacturing (CAD/CAM) techniques, such as stereolithographic (SLA) rapid prototyping, have been developed to fabricate surgical guides to improve the precision of implant...

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. The use of lasers opens a new dimension in the treatment of DH. Methods: Forty-eight patients with 244 teeth affect...

p class="MsoNormal" style="text-align: justify; line-height: 200%; margin: 0cm 0cm 10pt;"> Amaç: Teknoloji ve materyallerdeki gelişmeler estetik diş hekimliğinin en önemli prosedürlerinden biri olan renk seçimini kolaylaştırmaktadır. VITA Toothguide 3D-Master skalası geniş bir renk aralığına sahip olması ile Vitapan Classical skalasının yerini alma...

Attempts have been made to treat dentine hypersensitivity (DH) with lasers. However, there is limited knowledge on the effects of erbium, chromium-doped:yttrium, scandium, gallium and garnet (Er,Cr:YSGG) laser on DH. The aim of this study was to evaluate the efficacy of Er,Cr:YSGG laser on reduction in DH. Forty-two patients (146 teeth) were includ...

The advent of dental lasers has raised another possible treatment option for dentine hypersensitivity (DH) and has become a research interest in the last decades. The aim of this randomized, controlled, double-blind, split mouth, clinical study was to evaluate and compare the desensitizing effects of erbium, chromium-doped:yttrium, scandium, galliu...

Amalgam tattoos are common, asymptomatic, pigmented oral lesions that clinically exist as isolated, blue, gray, or black macules on the gingival, buccal, and alveolar mucosae, the palate, and/or the tongue. In this case report, the successful use of an erbium, chromium-doped:yttrium, scandium, gallium, and garnet laser for the removal of an amalgam...

Objectives: The aim of this in vitro study was to evaluate the surface roughness of human enamel bleached with 10% carbamide peroxide or 10% hydrogen peroxide bleaching agents at different times and also submitted to different superficial cleaning treatments. Methods: 140 human third molar teeth were embedded in acrylic resins and flat enamel sampl...