Person: ÖZKAN, YASEMİN
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ÖZKAN
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YASEMİN
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Publication Metadata only The effect of different attachment systems with implant-retained overdentures on maximum bite force and EMG(WILEY, 2012) ÖZKAN, YASEMİN; Ucankale, Mert; Akoglu, Burcin; Ozkan, Yasar; Ozkan, Yasemin KulakObjective: To compare the effect of different attachment systems with implant-retained overdentures on maximum bite force and muscle activity using electromyography (EMG). Background: Denture retention and stability is of considerable interest in prosthetic dentistry. Materials and methods: Thirty-five patients were examined: 15 edentulous patients treated with mandibular implant-retained overdentures (MIRO) and maxillary dentures (MCD) (two implant-ball attachment) (BC); 10 edentulous patients treated with MIRO and MCD (four implants-bar attachments) (BRC); 10 patients with edentulous mandibular treated with MIRO and maxillary fixed partial dentures (MFPD) (two implant-ball attachments) (BF). Before implant placement all patients received new dentures. After using these dentures for 3 months the maximum bite force and electrical activity of masseter muscle were measured. Two or four implants were then inserted into the intraforaminal region. After osseointegration periods, patients were treated with MIRO which duplicated their dentures and after three months the measurements were repeated. The data were collected and statistically analysed. Results: Muscle activity and chewing ability increased in the second period of measurements. Also chewing time was significantly decreased at the first measurements. The highest muscle activity was observed in the group of patients treated with group BF. Conclusion: The EMG values of the masseter muscle significantly increased when an implant attachments was used in the overdenture.Publication Metadata only Fracture Resistance of Manually and CAD/CAM Manufactured Ceramic Onlays(WILEY-BLACKWELL, 2013) EVREN, BUKET; Yildiz, Coskun; Vanlioglu, Burcin Akoglu; Evren, Buket; Uludamar, Altay; Kulak-Ozkan, YaseminPurposeThis in vitro study aimed to evaluate fracture resistance in lithium disilicate onlays fabricated with IPS e.max Press and IPS e.max CAD systems and luted with different adhesive cements. Material and MethodsFifty maxillary first molars were prepared using a mesio-occluso-disto-lingual onlay cavity model. Ten onlays from each group were cemented using etch-and-rinse adhesives and high-viscosity composite resin cement, and 10 were cemented with self-adhesive, dual-curing universal resin cement. Fracture resistance was measured. ResultsSignificant differences were observed between resin cements (p < 0.05) and between materials (p < 0.05), but the interaction of these variables did not produce a significant difference. The fracture resistance of pressable ceramics was significantly higher than that of CAD/CAM onlays (p < 0.05), and Syntac Variolink was significantly higher than that of Multilink Sprint (p < 0.05). ConclusionAll groups showed clinically acceptable fracture strength results. According to the study, both the onlay fabrication system and adhesive cements can be a viable treatment option.Publication Open Access Flexural properties of leucite and lithium disilicate ceramic materials after repeated firingst(ELSEVIER TAIWAN, 2014-06) GÖZNELİ, RİFAT; Gozneli, Rifat; Kazazoglu, Ender; Ozkan, YaseminBackground/purpose: Pressable all-ceramic materials are widely used in dentistry. Determining the effect of repeated firing on flexural strength will help to improve these materials so that they can remain resistant to fracture in restorative work. The aim of this study was to determine the change in the flexural strength of pressable all-ceramic materials after repeated firings, which may be unavoidable when color and shape corrections are necessary for use in dental restorations. Materials and methods: Forty disc specimens (15.5 mm x 2.1 mm) were prepared for each of four pressable ceramic materials (Empress 2, Finesse, Cergo, and Evopress) according to the manufacturers' instructions. Each group of specimens was tested for biaxial flexural strength (piston on three balls test) after the first (n = 10), third (n = 10), fifth (n = 10), and seventh (n = 10) firing periods. The data were analyzed using one-way analysis of variance. The Tukey multiple comparison test was then used to compare the strength of the different materials, and the Newman-Keuls multiple comparison test was used to compare the strength at each firing interval measured (alpha = 0.05). Results: The strengths of all of the pressable ceramic materials were decreased by repeated firings, especially after the seventh firing period, the only case in which the decrease was statistically significant. The flexural strength of the leucite-reinforced ceramic (Cergo) after the seventh firing was significantly lower than after the first firing (P = 0.04). The other materials were not significantly affected by repeated firings (P > 0.05). Conclusion: The number of firings does not appear to significantly affect the flexural strength of pressable all-ceramic materials. Copyright (C) 2013, Association for Dental Sciences of the Republic of China. Published by Elsevier Taiwan LLC. All rights reserved.Publication Metadata only Evaluating the additional effects of arthrocentesis on the condylar pathways of temporomandibular joint in patients with internal derangement treated with stabilizing splint(CHURCHILL LIVINGSTONE, 2014) GÖZNELİ, RİFAT; Yucel, Mehmet Ali; Gozneli, Rifat; Alkumru, Hasan Necdet; Kulak-Ozkan, YaseminObjectives: The purpose of this investigation is to find out the differences in the condylar pathways of the temporomandibular joint (TMJ) in patients treated with stabilizing splint and arthrocentesis accompanied by stabilizing splint in 6 months period. Study design: Forty patients who were assigned a clinical diagnosis of internal derangement of the TMJ were included in this study. Full arch stabilizing splints were made for all patients. Patients were divided into two groups; group A (patients who underwent arthrocentesis), group B (patients who did not underwent arthrocentesis). Computerized axiography was performed for each group before therapy (T-0), on the 3rd month (T-1), after arthrocentesis (T-A) (for group A) and on 6th month (T-2). Curve parameters were recorded in three-dimension; X axis (posteroanterior), Y axis (mediolateral), Z axis (superoinferior). Also the distance from the starting point of the movement on sagittal plane (S) was calculated. Results: There was a significant increase in the value of Z (p = 0.014) and S (p = 0.038) in mediotrusion movement in group A. Also, there was a significant increase in the value of Z (p = 0.007) in protrusion/retrusion movement, value of Z (p = 0.019) and S value (p = 0.002) in mediotrusion movement and value of Y in open/close movement in group B. Conclusions: No positive effects on condylar pathways of an additional arthrocentesis to splint therapy alone in patients with internal derangement were found in this study. (C) 2013 European Association for Cranio-Maxillo-Facial Surgery. Published by Elsevier Ltd. All rights reserved.Publication Metadata only Retrospective Analysis of Lithium Disilicate Laminate Veneers Applied by Experienced Dentists: 10-Year Results(QUINTESSENCE PUBLISHING CO INC, 2019) ÖZKAN, YASEMİN; Asian, Yilmaz Umut; Uludamar, Altay; Ozkan, YaseminPurpose: To report on the 10-year clinical treatment outcomes for a strictly applied clinical protocol for pressable lithium disilicate glass-ceramic laminate veneers (LDLVs) placed by two experienced dentists. Materials and Methods: A 10-year follow-up assessment of 364 LDLVs placed in 41 patients was undertaken with the clinical criteria color/esthetic match of the porcelain surface, chipping and fracture occurrence, marginal discoloration, and integrity, assessed using the modified United States Public Health Service scoring system. Results: After 10 years, the survival rate was 97.4%. Complications occurred in 1.64% of the restorations (fractures and debonding in 0.55% and 1.09%, respectively). Conclusion: A strict, repeatable protocol for placing veneers with experienced dentists yielded good results.Publication Open Access Bruksizm ve İmplant Başarısı: Literatür Derleme(2016-12-09) KAHRAMANOĞLU, ERKUT; Yildiz Domani̇Ç, Kübra; Kahramanoğlu, Erkut; Kulak Özkan, YaseminPublication Metadata only İmmediyat implant yüklemesi vaka sunumu(2019-10-31) ASLAN, YILMAZ UMUT; AKMANSOY, ŞÜKRÜ CAN; ÖZKAN, YASEMİN; Demirkılıç Z., Keban Aydın S., Aslan Y. U., Akmansoy Ş. C., Özkan Y.Publication Metadata only Clinical procedures, designs, and survival rates of all-ceramic resin-bonded fixed dental prostheses in the anterior region: A systematic review(WILEY, 2018) EVREN, BUKET; Tezulas, Emre; Yildiz, Coskun; Evren, Buket; Ozkan, YaseminObjectives: The aim of this study is to systematically review all the clinical articles about all-ceramic resin-bonded fixed dental prosthesis (RBFDP) in the anterior region and assess their designs, clinical procedures, and survival rates. A systematic review was conducted after searching electronic databases PubMed/Medline and EBSCOhost Research Databases for articles published in English between 1987 and July 2017. Materials and Methods: The inclusion criteria were selected as all clinical studies, original design clinical reports, and clinical reports (follow-up time more than 1 year) as all clinical information in the literature are desired to be included in the present review. Results: The initial electronic search generated 472 articles from PubMed/Medline and 464 articles from EBSCOhost Research Databases. After selection of the articles as per the inclusion criteria, a final sample of 29 original studies is decided as: 1 randomized controlled clinical trial, 4 clinical controlled trials, 4 prospective cohort studies, 2 retrospective cohort studies, 6 original design clinical reports, and 12 clinical reports. After evaluation of the selected articles, it is likely that cantilever design all-ceramic RBFDPs are more successful than two retainer design in the anterior region; however, there is limited evidence for this result in the literature. Conclusion: Well-designed randomized controlled clinical trials with large sample size are still needed to achieve more accurate results about the clinical success rate of different RBFDPs designs in the anterior region.Publication Metadata only The Effect of Different Restorative and Abutment Materials on Marginal and Internal Adaptation of Three-Unit Cantilever Implant-Supported Fixed Partial Dentures: An In Vitro Study(WILEY-BLACKWELL, 2013) KAHRAMANOĞLU, ERKUT; Kahramanoglu, Erkut; Kulak-Ozkan, YaseminPurposePassive fit is generally assumed to be a significant prerequisite for long-term implant success. The aim of this study was to evaluate the precision fit of three-unit implant-supported fixed partial dentures with different restorative and abutment materials on two implant systems: the Straumann and Astra Tech. Materials and MethodsTwo mandibular epoxy resin models (one for each implant system) were fabricated, and two implants were inserted at the first and second molar region. Poly(vinyl siloxane) impression material was used to make the dental impression. For each implant system, fifteen models were fabricated, and each group was divided into three subgroups (group 1: titanium abutment with metal framework, group 2: titanium abutment with zirconium framework, group 3: zirconium abutment with zirconium framework). The replica technique was used to examine the marginal and internal gap values. For each restoration, 20 measurements were performed, totaling 1200 measurements for all groups. Data were evaluated statistically using ANOVA and LSD post hoc test (p < 0.05). ResultsThe highest values at internal adaptation measurements were found at the occlusal surface for all groups. When the mean values of the marginal measurements were assessed, the lowest measurements were found in group 3 (51.416m), and the highest values were found in group 1 (79.394m). There were statistically significant differences between subgroups for marginal measurements (p < 0.05). ConclusionsAs included in our study, marginal measurement values were found to be 46 to 87m. The marginal discrepancy of the tested materials could be considered clinically acceptable.Publication Metadata only Computer guided novel approach in treatment of Etdentulous patients with immediate loaded implants(2017-09-20) ASLAN, YILMAZ UMUT; ÖZKAN, YASEMİN; ASLAN Y. U., ÖZKAN Y.