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Now showing 1 - 10 of 27
  • PublicationMetadata only
    Evaluating Cytotoxic Effects and Cytotoxicity Origins of Bulk-Fill Materials by LC-MS/MS.-
    (2022-09-17T00:00:00Z) Kazak, Mağrur; Dönmez, Nazmiye; Bahadori, Fatemeh; Yenigün, Vildan Betül; Koçyiğit, Abdürrahim; DÖNMEZ, NAZMİYE; YENİGÜN, VILDAN BETÜL; KOÇYİĞİT, ABDÜRRAHİM
  • PublicationOpen Access
    Impact of a Surface Sealant Application on the Color Stability of a Nano-hybrid Composite Resin
    (2021-12-01T00:00:00Z) Sarıalioğlu Güngör, Ayça; Dönmez, Nazmiye; Kahya, Deniz Selin; Hergüner Siso, Şeyda; SARIALİOĞLU GÜNGÖR, AYÇA; DÖNMEZ, NAZMİYE
    Objective: Mouthwashes containing chlorhexidine can cause discoloration in restorative materials when used for the long-term. To prevent staining of a restorative material, several protective materials are used. The aim of this in vitro study was to evaluate the impact of a surface sealant on the color stability of a nano-hybrid composite resin material immersed in different mouthwashes. Methods: A total of 42 composite resin discs (10x2 mm) were prepared with a nano-hybrid composite resin (Herculite XRV Ultra) using Teflon moulds. The composite specimens were first divided into two groups (with or without a surface sealant) then into three subgroups (n=7) according to the mouthwashes (Gengigel, Oderol, and Chlorhex). After SS application to 21 specimens, all the discs were subjected to baseline color measurements using a spectrophotometer according to the Commission Internationale de l’Eclairage L*a*b* system. The specimens underwent thermal cycling. Following immersion in different mouthwashes for 24 hours, the color measurements were repeated. The ∆E data were assessed using Kruskal-Wallis one-way ANOVA. Mann-Whitney U test was performed for different immersion mouthwashes (p<0.5). Results: Statistically significant differences (p<0.5) were found between the unsealed composite specimens immersed in Chlorhex and the other mouthwashes in terms of ∆E values. The Chlorhex appeared to be associated with the most severe alteration in color (5.14±0.83), followed by Gengigel (2.21±1.46) and Oderol (1.94±1.75). There were no statistically significant differences (p>0.05) between the sealed and unsealed composite specimens in terms of the color changes. Conclusion: The application of a low viscosity liquid surface sealant material did not show the expected effect on the color stability of a nano-hybrid composite resin in terms of three different mouthwashes.
  • PublicationOpen Access
    Perceptions of dental students towards online education during the COVID-19 pandemic
    (2021-12-01T00:00:00Z) Sarıalioğlu Güngör, Ayça; Şeşen Uslu, Yeşim; SARIALİOĞLU GÜNGÖR, AYÇA; DÖNMEZ, NAZMİYE
    Purpose: This study evaluated the usage habits, attitudes, and perceptions of undergraduate dental students toward distance (online) learning and identified variables related to those attitudes. Materials and methods: The study included 1,605 undergraduate dental students who participated voluntarily. The data collection tool consisted of a distance learning attitude scale, a questionnaire on personal information, and open-ended questions. The perceptions of dental students to distance education according to the year and type of dental school they attended were evaluated. Results: Most students expressed that distance learning in dental courses was not as effective as traditional face-to-face education (59.1%, n=949). While students studying at state universities had a more negative view of distance education, the satisfaction scores of the first-year students were found to be significantly lower than the other students (p<0.05). Conclusion: Dental students were generally unhappy with the interruption of traditional education caused by COVID-19 and having to continue their education online. However, under the circumstances, they saw it as an advantage allowing them to continue their education and avoid a complete suspension.
  • PublicationOpen Access
    Reactions of Subcutaneous Connective Tissue to Mineral Trioxide Aggregate, Biodentine (R), and a Newly Developed BioACTIVE Base/Liner
    (2020-05-01T00:00:00Z) Karabulut, Baris; DÖNMEZ, NAZMİYE; Goret, Ceren Canbey; Atas, Cafer; Kuzu, Ozlem; DÖNMEZ, NAZMİYE
    Aim. There is an increasing interest in the application of BioACTIVE materials to achieve hard tissue formation and maintain pulp vitality. Mineral trioxide aggregate (MTA) and Biodentine (R) are BioACTIVE materials used for pulp capping. Recently, dental researchers have produced BioACTIVE glass-incorporated light-curable pulp capping material. The study is aimed at evaluating the subcutaneous connective tissue reactions to MTA, Biodentine (R), ACTIVA BioACTIVE Base/Liner. These materials were placed in polyethylene tubes and implanted into the dorsal connective tissue of Sprague Dawley rats. The presence of inflammation, predominant cell type, calcification, and thickness of fibrous connective tissue was recorded by histological examination 7, 30, and 60 days after the implantation procedure. Scores were defined as follows: 0 = none or few inflammatory cells, no reaction; 1 = = 125 cells, severe reaction. Fibrous capsule thickness, necrosis, and formation of calcification were recorded. ANOVA and post hoc Dunnett-s tests were used for statistically analyses (p<0.05). Results. In terms of oedema, inflammation, fibrous capsule, and necrosis, no significant differences were found in any time period for any material. MTA and Biodentine (R) showed higher calcification than in the ACTIVA BioACTIVE on day 30, and the difference was statistically significant (p<0.05). After 60 days, while calcification was not seen in the control group, it was observed in the test groups. There was a statistically significant difference between the control and the others. Conclusion. All materials were well tolerated by the tissues in the 60-day evaluation period. One notable finding is the presence of dystrophic calcification in the connective tissue adjacent to the newly developed BioACTIVE Base/Liner material. Therefore, this new BioACTIVE Base/Liner material may be safely recommended to clinicians as a pulp capping material.
  • PublicationMetadata only
    Twelve-month Clinical Performance Evaluation of a Glass Carbomer Restorative System
    (2022-07-01T00:00:00Z) Kaynar, Zeynep Buket; Dönmez, Nazmiye; DÖNMEZ, NAZMİYE
  • PublicationMetadata only
    Effects of Home-Bleaching Agents on Physical Properties of Dental Materials
    (2022-09-17T00:00:00Z) Dönmez, Nazmiye; Dönmez Kıran, Gökçe; DÖNMEZ, NAZMİYE
  • PublicationMetadata only
    Evaluating Cytotoxicity of Dentin Bonding Adhesive Systems on Human Dental Pulp Stem Cells
    (2022-04-23T00:00:00Z) Kazak, Mağrur; Sarıalioğlu Güngör, Ayça; Özman, Zeynep; Dönmez, Nazmiye; SARIALİOĞLU GÜNGÖR, AYÇA; ÖZMAN, ZEYNEP; DÖNMEZ, NAZMİYE
  • PublicationMetadata only
    (2021-04-22T00:00:00Z) Sönmez, Hilal Şule; Dönmez, Nazmiye; Tajıbayev, Bazarbay; SÖNMEZ, HİLAL ŞULE; DÖNMEZ, NAZMİYE; TAJIBAYEV, BAZARBAY
  • PublicationOpen Access
    Knowledge, stress levels, and clinical practice modifications of Turkish dentists due to COVID-19: a survey study
    (2021-03-01T00:00:00Z) Sarıalioğlu Güngör, Ayça; Dönmez, Nazmiye; Uslu, Yeşim Şeşen; SARIALİOĞLU GÜNGÖR, AYÇA; DÖNMEZ, NAZMİYE
    Dentists are exposed to the highest risk of occupational respiratory and droplet infections by working face-to-face with patients. The aim of this study was to investigate the knowledge of symptoms and modes of transmission of COVID-19, stress levels and clinical practice modifications of Turkish dentists during the COVID-19 pandemic. An online survey (15 questions) was sent to Turkish dentists from May 5 to 12 May, 2020. The survey comprised questions about dentists’ demographic characteristics, their knowledge about COVID-19, stress levels and the measures taken in dental clinics against COVID-19. This study included a total of 1,095 Turkish dentists. The data were expressed as frequency with percentage values for overall variables. Dentists were most familiar with high fever among the symptoms of COVID-19 (99.4%) and 99.2% of them reported that COVID-19 was transmitted with eye, mouth and nasal mucosa contact on surfaces contaminated with the droplets of infected persons. While the stress levels of females were higher than males, the stress levels of dentists with more than 20 years of professional experience were found to be lower. Regarding the precautions to be taken as a preventive measure when working again, 86.6% of the dentists took precautions by increasing daily patient care intervals and only 38.4% of the dentists wore an N95 mask. During this pandemic, knowing the conditions about when the treatments can be applied and the precautions to be taken will shed light on dentistry staff. Current recommendations of national authorities about the coronavirus should be followed.
  • PublicationMetadata only
    Margınal Mıcroleakage Of Glass Ionomer Based Restoratıons After Conventıonal Cavıty Preparatıon And Er: Yag Laser Irradıatıon
    (2022-10-01T00:00:00Z) Kaynar, Zeynep Buket; Dönmez, Nazmiye; Siso, Şeyda Hergüner; DÖNMEZ, NAZMİYE