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Photogrammetric Analysis of Multiple Implant Abutment Impressions under Different Conditions

Open Journal of Stomatology 2017年第9期7卷 408-418页

作者： Funda Bayindir Melike Pinar Yildirim nuran dinckal yanikoglu Department of Prosthodontics Faculty of DentistryAtatürk UniversityErzurumTurkey Beyhekim Oral and Dental Healthy Center SelcukluTurkey

Purpose: The aim of this investigation was to evaluate and compare the dimensional accuracy of hydrophilic polysiloxane, vinyl polysiloxane (VPS), and polyether (PE) impression materials under dry, moist and wet conditions. Methods: An acrylic master model including 6 implants was formed, and 108 impressions were made up of this acrylic model at total. In this study, the materials of hydrophilic polysiloxane impression material, 1 hydrophilic vinyl polysiloxane impression material and 1 polyether impression material were tested. Twelve impression of each material were created under dry, moist and wet respectively. Two reference distances were evaluated on each study model by using a graphics-editing program whereas for comparison of mean dimensional changes one-way analysis of variance and Student t-test were used. Results: One-way analysis of variance revealed significant differences between impression materials and conditions (P P Conclusions: All impression materials showed a statistically significant difference under dry, moist and wet conditions.

关键词： Photogrammetric Analysis Implant Abutment Impressions

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Flexural Strength of Temporary Restorative Materials Stored in Different Solutions

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Open Journal of Stomatology 2014年第6期4卷 291-298页

作者： nuran dinckal yanikoglu Funda Bayindir Duygu Kürklü Bilge Besir Prosthodontics Department Faculty of DentistryAtatürk UniversityErzurumTurkey Prosthodontics Department Faculty of DentistryKaradeniz Teknik UniversityTrabzonTurkey

Aim: The aim of this study was to evaluate the effects of different solutions on the flexural strength of one methacrylate-based resin and three bis-acryl resin provisional materials using an in vitro model test system. Methods: The specimens (25 × 2 × 2 mm) were prepared from interim materials and stored for 14 days at 37°C in different solutions (coffee, burn, cola) and distilled water (control group). A standard three-point bending test was conducted on the specimens with an Instron universal testing machine at crosshead speed of 0.5 mm/min. Data were analyzed using the one-way analysis of variance and Tukey HSD multiple comprasion tests. Results: The methacry-late-based resin (Takilon) showed the least fracture strength (61.6 - 85.6 MPa). One of the bis-acryl resins (Protemp 4-3M ESPE) showed the highest fracture strength (112 - 128 MPa). Conclusions: All bis-acryl resin composite materials exhibited high fracture strength over the traditional methyl methacrylate resin throughout the 14 day time interval of investigation. The different solutions have not statistically significant effect on the flexure strength values on four temporary materials.

关键词： Component Temporary Dental Restorations Acrylic Resins Dental Resins

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Comparison of Different Implant-Supported Fixed Restoration Types: A Literature Review

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Open Journal of Stomatology 2024年第11期14卷 421-432页

作者： Zeynep Sen Yilmaz nuran yanikoglu Merve Koseoglu Department of Prosthodontics University of Ataturk Erzurum Trkiye Department of Prosthodontics University of Sakarya Sakarya Trkiye

Background: The screw and cement-retained implant-supported fixed prosthesis has advantages and disadvantages. However, current research comparing the properties of these restorations is lacking. Objectives: The aim of the study was to review the current literature on the properties of screw and cement retained implant supported restorations. Material and Methods: A literature search was conducted from January 2010 to December 2023, using 4 databases to identify research. Sixty studies met the inclusion criteria. Results: Cement-retained restorations have some advantages. Passive fit is easier to achieve, and eliminating occlusal access holes can help with the occlusal adjustments in cemented restorations. However, in case residual cement is not completely removed after cementation, it becomes a predisposing factor for peri-implantitis and marginal bone loss. The main advantage of screw-retained restorations is the retrievability, which can be achieved without damaging the restoration or fixture. However, in case the implant is not ideally positioned, the location of the screw access channel can negatively affect the aesthetics of the screw-retained restorations. In addition, porcelain fracture and screw loosening occur more frequently in screw-retained restoration. Conclusions: Screw and cement-retained restorations display specific advantages and disadvantages;nevertheless, the selection of one retention method over another depends on the clinical scenario.

关键词： Implant-Supported Restorations Retention Cementation Screw

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Color Changes of Polyamid and Polymetyhl Methacrylate Denture Base Materials

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Open Journal of Stomatology 2014年第10期4卷 489-496页

作者： Nurdan Polat Sagsoz nuran yanikoglu Hamza Ulu Funda Bayindir Prosthodontics Department School of DentistryAtaturk UniversityErzurumTurkey

Aim: Both conventional and flexible resins may show color alteration due to intrinsic and extrinsic factors. The aim of this study was to evaluate the color changes of the polyamid and heat polymerized acrylic denture base materials in storage of different staining solutions. Methods: Two denture base materials were used in this study. The speciemens were stored in two staining solutions (tea, coffee), distilled water and denture cleaner. For each group, 14 speciemens (25 × 15 × 2.5 mm) were prepared. The color of speciemens was measured using a colorimeter according to the CIE L*a*b* color scale. The color changes of speciemens were evaluated before and after 7 and 30 days. All data recorded were taken by the same investigator to minimize inconstancy of technique. The data were analyzed statistically by repeated measures analysis of variance and Tukey honestly significant difference multiple comparison tests. It was found no statistically significant difference between solutions (P > 0.05). Results: Polyamid denture base resin displayed the greatest colour change when compared to polymetyhl methacrylate denture base resin (P < 0.001). Polyamid material indicated the highest value (ΔE: 7.28) in coffee solution for 7 days. Significance: The colour stability of polymetyhl methacrylate denture base resin is greater than polyamid denture base resin.

关键词： Color Stability Polyamid Polymetyl Methacrylate Denture Base Solution

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