Gozneli, R. | Ozkan, Y.K. | Kazazoglu, E. | Akalin, Z.F.

Article | 2005 | Journal of Prosthetic Dentistry93 ( 6 ) , pp.522 - 525

Bartter's syndrome is an autosomal recessive form of severe volume depletion due to renal salt wasting. This clinical report describes the prosthodontic treatment for a 24-year-old man who suffers from Bartter's syndrome. The treatment plan included endodontic treatment of the maxillary anterior incisors and placement of cast dowel-and-core restorations because of reduced crown height. The patient's remaining teeth were restored with metal-ceramic crowns. Copyright © 2005 by The Editorial Council of The Journal of Prosthetic Dentistry.

Buyukguclu, G. | Ozkurt-Kayahan, Z. | Kazazoglu, E.

Article | 2018 | Implant Dentistry27 ( 4 ) , pp.429 - 433

Purpose: To evaluate the reliability of the Osstell implant stability quotient (ISQ) and Penguin resonance frequency analysis (RFA) devices in measuring implant stability. Materials and Methods: Forty implants were embedded in self-curing acrylic resin, soft-lining material, polyvinyl siloxane impression material, and polycarboxylate cement (n ¼ 10). After the initial setting times were completed, the stability of each implant was measured with Osstell ISQ and Penguin RFA with 3 repeated measurements. The “intraclass correlation coefficient” evaluated the correspondence between the measurements (P, 0.05). Results: Polyvinyl siloxane . . . impression material had lower ISQ values than soft-lining material, self-curing acrylic resin, and polycarboxylate cement in both devices (P, 0.05). The intraclass correlation was 1.00 in self-curing acrylic resin and 0.48 in polycarboxylate cement (P, 0.05) for Osstell. This value was 0.95 in self-curing acrylic resin and 0.38 in polycarboxylate cement (P, 0.05) for Penguin. There was no correlation between the repeated measurements in soft-lining material and polyvinyl siloxane impression material for both devices (P . 0.05). The repeatability was 0.90 for Osstell and 0.60 for Penguin (P, 0.05). Conclusions: Osstell ISQ and Penguin RFA are reliable only when the implants are embedded in stiff materials. Osstell ISQ is more reliable than Penguin RFA. Copyright © 2018 Wolters Kluwer Health, Inc. All rights reserved Daha fazlası Daha az

Akin, H. | Ozkurt, Z. | Kirmali, O. | Kazazoglu, E. | Ozdemir, A.K.

Article | 2011 | Photomedicine and Laser Surgery29 ( 12 ) , pp.797 - 802

Objective: The aim of this study was to evaluate the effect of different surface treatments; sandblasting, Er:YAG, Nd:YAG, or CO2 laser irradiation on the shear bond strength (SBS) of zirconia ceramic to dentin. Background data: Zirconia is not properly luted with resin cements. Various surface treatment methods have been suggested for zirconia to obtain high bond strength to resin cements. There is no study that compared the effect of different laser types (Er:YAG, Nd:YAG, CO2) with sandblasting on SBS between zirconia and dentin. Methods: One hundred and twenty human maxillary third molar teeth were sectioned 3 mm below the occlus . . .al surfaces, embedded in a metal ring with autopolymerizing acrylic resin, and stored in distilled water at 37°C. One hundred and twenty disc-shaped zirconia specimens were fabricated (6 mm in diameter and 4 mm in thickness), and randomly assigned to six groups (n=20): Group 1, untreated (control); Group 2, sandblasted; Group 3, Er:YAG laser irradiated; Group 4, Nd:YAG laser irradiated with contact; Group 5, Nd:YAG laser irradiated with non-contact; Group 6, CO2 laser irradiated. They were cemented onto the dentin with dual-cured resin cement (Variolink®). After they were stored in distilled water at 37°C for 24 h, the SBS test was performed at a crosshead speed of 1 mm/min. The fractured specimens were examined under a stereomicroscope to evaluate the fracture pattern. Results: Results of this study did not show statistically significant differences between Groups 1 and 2, or among Groups 3, 4 and 5. The lowest SBS was recorded in Group 6 (CO2 laser), and the highest SBS was recorded in Group 4 (Nd:YAG laser with contact), followed by Group 3 (Er:YAG laser). The adhesive failure mode was predominantly observed in Groups 2, 3, 5, and 6. Group 1 showed 45% mixed failure and Group 4 showed 50% mixed failure. Conclusions: This study shows that Er:YAG and Nd:YAG laser treatment increased the bond strength of zirconia compared to sandbasting and CO2 laser treatment. © Copyright 2011, Mary Ann Liebert, Inc Daha fazlası Daha az

Yener, E.S. | Ozcan, M. | Kazazoglu, E.

Article | 2011 | Acta odontológica latinoamericana : AOL24 ( 2 ) , pp.133 - 140

The aim of this study was to evaluate the effect of glazing on biaxial flexural strength of different zirconia core materials. Disc-shaped zirconia (ZirkonZahn, Cercon, Ceramill) specimens (15 mm x 1.15+/-0.02 mm) were prepared according to manufacturers' instructions. The specimens from each system were divided into 2 groups (N= 10): unglazed and glazed. Glaze liquid was applied on the entire surface of the specimens of the glazed group and fired according to manufacturers' instructions. Flexural strength test was performed in a universal testing machine (crosshead speed: 1 mm/min). Data were statistically analyzed using two-way AN . . .OVA and Tukey's test (p= 0.05). The mean flexural strength values for unglazed ZirkonZahn specimens (1388+132 MPa) were significantly higher than those of unglazed Cercon (1104+124 MPa) and unglazed Ceramill (1172+127 MPa) specimens. The mean flexural strength of glazed specimens did not show any statistically significant difference. Glazing decreased the flexural strength results significantly for all systems (p< 0.05). Glazing decreased the flexural strength values for ZirkonZahn, Cercon and Ceramill specimens. Unglazed ZirkonZahn specimens revealed significantly higher mean flexural strength values than that ofunglazed and glazed zirconia materials tested in this study Daha fazlası Daha az

Özkurt, Z. | Kazazoglu, E.

Article | 2010 | Journal of Prosthodontics19 ( 1 ) , pp.64 - 68

The application of ceramic materials for the fabrication of dental restorations is a focus of interest in esthetic dentistry. The ceramic materials of choice are glass ceramics, spinel, alumina, and zirconia. Zirconia was introduced into dentistry in the 1990s because of its good mechanical and chemical properties and is currently being used as a material for frameworks, dowels, implants, abutments, and orthodontic brackets. Many in vitro studies about zirconia use have been published, but clinical long-term studies are very important. This article presents data regarding the incidence of clinical success and complications of zircon . . .ia in these dental applications. Clinical studies published to date seem to indicate that zirconia is well tolerated and sufficiently resistant. © 2009 by The American College of Prosthodontists Daha fazlası Daha az

Işeri, U. | Özkurt, Z. | Kazazoglu, E.

Article | 2011 | Dental Materials Journal30 ( 3 ) , pp.274 - 280

The aim of this study was to compare the shear bond strengths (SBS. of cast, machined, and laser-sintered titanium to dental porcelain. Two kinds of dental porcelains (Titankeramik and Triceram. were applied on cast (Tritan), machined (DC-Titan), and laser-sintered (EOSINT. titanium specimens (n=10). SBS test was conducted, and fracture surface analysis was also performed to determine the failure modes. Two-way ANOVA, Student's t-test, and post hoc test were used to analyze the data (p

Kursoglu, P. | Karagoz Motro, P.F. | Kazazoglu, E.

Article | 2015 | Journal of Prosthetic Dentistry113 ( 1 ) , pp.48 - 53

Statement of problem Understanding the translucency of ceramic materials is important to achieve good esthetics. Ceramic thickness is related to translucency; however, less information about core-veneer thickness in combination is available. Purpose The purpose of this study was to investigate the translucency parameters of core-veneer thicknesses in 2 different ceramic materials. Material and Methods A total of 56 ceramic disks of different thickness were fabricated as cores according to the manufacturer's recommendations and divided into groups (n=7). Each was veneered with its compatible veneer ceramic with a different thickness . . .(0.2, 0.5, 0.7 mm). One group of each ceramic type was left without veneer. The groups were named according to core names (group IPS e.max Press [EP], group IPS Empress Esthetic [EE]), and numbers were given according to thickness combination: 1=(1.00+0.5); 2=(0.8+0.7); 3=(1.00); 4=(0.8+0.2). All surfaces were measured by profilometry to ensure consistency within the groups. A glass disk (1.5 mm) positive control (group P) and a metal core (1.5 mm) negative control (group N) were prepared. The translucency parameter values were calculated by using spectrophotometry to calculate the color differences of the specimens over black and white backgrounds. Results A 1-way ANOVA found significant differences among the translucency parameter values of the ceramic groups (P.05). Conclusions Total ceramic thickness affected the translucency; higher combined ceramic thickness resulted in lower translucency parameter values. When total thickness decreases, the translucency of core material has more effect than that of veneer material on translucency parameter values. © 2015 Editorial Council for the Journal of Prosthetic Dentistry Daha fazlası Daha az

Canpolat, C. | Özkurt-Kayahan, Z. | Kazazoglu, E.

Article | 2014 | Journal of Prosthetic Dentistry112 ( 3 ) , pp.418 - 422

Traumatic injuries or congenital malformations may cause soft and hard tissue defects resulting in the loss of alveolar bone and attached mucosa. Restoring the defective area presents a challenge for clinicians. The prosthetic rehabilitation of 2 patients with maxillary dentoalveolar defects with 2 different prosthetic designs is presented. The esthetic and functional requirements of the patients were fulfilled.

Kursoglu, P. | Karagoz Motro, P.F. | Kazazoglu, E.

Article | 2014 | Journal of Prosthetic Dentistry112 ( 2 ) , pp.306 - 313

Statement of problem Stainability is an important factor in the long-term clinical success of ceramic restorations. Contour adjustments on restoration surfaces cause differences in ceramic texture that may be affected differently by the staining agent. Purpose The purpose of this study was to evaluate the surface texture obtained by different surface treatments relevant to the stainability of heat-pressed leucite-reinforced ceramic disk-shaped specimens. Material and methods Sixty-six ceramic disks (IPS Empress Esthetic) (15×2 mm) were prepared, glazed, and then assigned to 6 groups. All disks were abraded with a diamond rotary cutt . . .ing instrument except group GG (control), which was not subjected to any procedure. Group R (rotary diamond cutting instrument) was left untreated after abrasion. Group PB was polished with an abrasive stone, a round polishing brush, and paste with felt wheels. Group PU was polished with 1.0- to 0.5-µm polishing pastes with a goat-hair brush. Group PS was polished with abrasive stone, silicon carbide polishers, and polishing paste with polishing disks. Group GR was reglazed. Surface roughness was measured with a profilometer and evaluated with scanning electron microscopy. A spectrophotometer was used before and after 12 days of immersion in a coffee solution to assess color difference. Data were analyzed by 1-way ANOVA, the Tukey honestly significant difference test, and the Pearson rank correlation tests (?=.05). Results Ra values of groups from highest to lowest were, in order, R, PB, PU, PS, GR, and GG ( Daha fazlası Daha az

Özkurt, Z. | Baybora Kayahan, M. | Kazazoglu, E.

Article | 2012 | Journal of Prosthodontics21 ( 5 ) , pp.385 - 388

Purpose: The aim of this study was to evaluate the fracture strength of experimental hollow and solid design zirconia dowels. Materials and Methods: Three types of dowels (fiber-reinforced composite [FRC], hollow design, and solid design zirconia dowels) were tested in the study (n = 10). A three-point bending method was conducted, and a load was applied until fracture. The values were recorded as Newtons (N) and then converted to megapascals (MPa) according to the diameter of the dowels. Statistical analyses were performed using one-way ANOVA and Tukey HSD tests. The significance was set at p < 0.05. Results: The mean fracture stre . . .ngth of the hollow design zirconia dowels was significantly higher (960.72 MPa) than solid zirconia dowels (741.78 MPa) and FRC dowels (687.64 MPa) (p < 0.05). Conclusions: The hollow design zirconia dowel seems to have sufficient fracture strength for anterior restorations. This design may be beneficial to access the apical region when retreatment is necessary, without any dowel-removing procedure. © 2012 by the American College of Prosthodontists Daha fazlası Daha az

Kayahan, M.B. | Malkondu, Ö. | Canpolat, C. | Kaptan, F. | Bayirli, G. | Kazazoglu, E.

Article | 2008 | Oral Surgery, Oral Medicine, Oral Pathology, Oral Radiology and Endodontology105 ( 1 ) , pp.385 - 388

Objective: The purpose of this study was to evaluate the relationship between the quality of root canal fillings and type of permanent coronal restorations and their association with the periapical status in a Turkish subpopulation. Study design: There were 1268 endodontically treated teeth from 280 panoramic radiographs that were evaluated. Two observers assessed the radiographs using an x-ray viewer with 2 times magnification. Teeth were classified according to the type of restorations. The quality of root canal fillings were evaluated according to the criteria determined by Tronstad et al. Apical status was assessed by the Periap . . .ical Index scores (PAI) proposed by Ørstavik et al. Chi-square test was used for statistical analysis. Results: There were 59.5% of endodontically treated teeth that showed healthy periapex. Teeth with good endodontic treatment showed statistically significant high healthy periapex rates regardless of the type of the restoration. In addition, the evaluation of the entire material also showed that the roots with posts had significantly more periapical pathosis than roots without posts (P = .001). Conclusions: It can be concluded that, although the quality of the root canal filling plays a key role in the outcome of endodontic therapy, the type of restoration can also be a contributing factor in the treatment outcome. © 2008 Mosby, Inc. All rights reserved Daha fazlası Daha az

Salem, R.S.T. | Ozkurt-Kayahan, Z. | Kazazoglu, E.

Article | 2019 | International Journal of Prosthodontics32 ( 6 ) , pp.519 - 525

Purpose: To investigate the shear bond strength (SBS) of various primer/resin cement systems to monolithic zirconia under different levels of storage. Materials and Methods: Disk-shaped specimens of monolithic zirconia (10 x 3 mm, n = 72) were polished with silicon carbide paper, and the bonding surfaces were sandblasted with aluminum oxide (Al2O3). The samples were divided into three groups (n = 24) according to primer/cement system: Z-PRIME Plus/DUO-LINK (Bisco); Clearfil Ceramic Primer Plus/PANAVIA SA (Kuraray); and Single Bond Universal Adhesive/RelyX Ultimate (3M ESPE). After bonding was completed, each group was divided into t . . .wo subgroups (n = 12) under different levels of 24-hour storage and thermocycling. The specimens were embedded in acrylic molds, and SBS tests were conducted. Modes of failure were also evaluated. The data were analyzed using one-and two-way analysis of variance (ANOVA) and Tukey Honest Significant Difference test. Significance was set at P <.05. Results: The highest and lowest SBS values were observed in the Kuraray (12.52 ± 1.34 MPa) and Bisco (5.32 ± 0.54 MPa) systems, respectively, in the thermocycled groups (P <.05). Similarly, in short-term storage groups, Kuraray had the highest (16.47 ± 1.5 MPa) and Bisco the lowest (7.43 ± 1.06 MPa) SBS values (P <.05). Regardless of adhesive system used, thermocycling significantly decreased the SBS of all cement groups (P <.05). Of the failures, 49% were adhesive, 45% were mixed, and 6% were cohesive. Conclusion: A methacryloyloxydecyl dihydrogen phosphate-containing resin cement is recommended to provide a durable bond for monolithic zirconia. Int J Prosthodont 2019;32:519-525. doi: 10.11607/ijp.6258. © 2019 by Quintessence Publishing Co Inc Daha fazlası Daha az