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Sakar D, Guncu MB, Arikan H, Muhtarogullari M, Aktas G, Reiss N, Turkyilmaz I. Effect of different implant locations and abutment types on stress and strain distribution under non-axial loading: A 3-dimensional finite element analysis. J Dent Sci 2024; 19:607-613. [PMID: 38303808 PMCID: PMC10829709 DOI: 10.1016/j.jds.2023.11.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2023] [Revised: 11/05/2023] [Indexed: 02/03/2024] Open
Abstract
Background/purpose Dental implants have been a popular treatment for replacing missing teeth. The purpose of this study was to investigate the impact of engaging (hexagonal) and non-engaging (non-hexagonal) abutments in various six-unit fixed prosthesis on the stress distribution and loading located in the implant neck, implant abutment, and surrounding bone. Materials and methods Three implants were digitally designed and inserted parallel to each other in edentulous sites of the maxillary right canine, maxillary right central incisor, and maxillary left canine. Titanium base engaging abutments, non-engaging abutments and connecting screws were designed. Five distinct models of 6-unit fixed dental prosthesis were created, each featuring different combinations of various abutments. Forces (45-degree angle) were applied to the prosthesis, allowing for the analysis of the stress distribution on the implant neck and abutments, and the maximum and minimum principal stress values on the cortical and trabecular bone. Results Von Mises stress values and stress distributions located in the implant neck region due to the applied loading forces were analyzed. The overall stress values were highest while employing the hexagonal abutments. The maxillary left canine with a hexagonal abutment (model 5) reported the highest von mises value (64.71 MPa) while the maxillary right canine with a non-hexagonal abutment (model 4) presented lowest von mises value (56.69 MPa). Conclusion The results suggest that both the various abutment combinations (engaging and non-engaging) on five different models have a similar influence on the distribution of stress within the implant system.
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Affiliation(s)
- Didem Sakar
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Mustafa Baris Guncu
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Hale Arikan
- Department of Prosthodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey
| | - Mehmet Muhtarogullari
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Guliz Aktas
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Natalia Reiss
- New York University College of Dentistry, New York, NY, USA
| | - Ilser Turkyilmaz
- Department of Prosthodontics, New York University College of Dentistry, New York, NY, USA
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Uzel SM, Guncu MB, Aktas G, Arikan H, Reiss N, Turkyilmaz I. Influence of the implant scan body modifications on trueness of digital impressions. J Dent Sci 2023; 18:1771-1777. [PMID: 37799878 PMCID: PMC10547997 DOI: 10.1016/j.jds.2023.04.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2023] [Revised: 04/08/2023] [Indexed: 10/07/2023] Open
Abstract
Background/purpose Effects of implant angulation on digital impression accuracy remain controversial. The purpose of this study was to assess the relationship between the alteration of implant scan bodies and the trueness of digital impressions. Materials and methods A maxillary typodont without the right premolars and first molar was scanned with a laboratory scanner and saved as a standard triangular language (STL) file. A model from the STL file was fabricated with a 3-dimensional printer. Two implants were placed into the first premolar and first molar sites of the model, followed by the insertion of two scan bodies onto the implants. These scan bodies were divided into four test groups, based on the surface modifications. A digital impression of each typodont was made with three different intraoral scanners. An abutment was digitally seated on each implant. 120 STL files (30 for each group) of the typodont with two implants and two corresponding abutments were used for statistical analysis. Results A total of 240 values (two implants for each typodont) were obtained after each sample (4 groups) was scanned 10 times by utilizing three intraoral scanners. The overall linear and angular discrepancies were analyzed. Group 1 showed the lowest linear discrepancy of 14.9 ± 5.4 μm while Group 4 reported the highest linear discrepancy of 137.5 ± 41.7 μm, yielding a statistical significance (P < 0.05). Conclusion It has been concluded that the more adjustments made to the scan bodies, the greater the linear and angular deviations occur, compromising the trueness of the digital implant impression.
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Affiliation(s)
- Sema Merve Uzel
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Mustafa Baris Guncu
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Guliz Aktas
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Hale Arikan
- Department of Prosthodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey
| | - Natalia Reiss
- New York University College of Dentistry, New York, NY, USA
| | - Ilser Turkyilmaz
- Department of Prosthodontics, New York University College of Dentistry, New York, NY, USA
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Tuncer B, Aktas G, Baris Guncu M, Deniz D, Muhtarogullari M, Al-Haj Husain N, Özcan M. Effects of Surface Treatments and Cement Type on Shear Bond Strength between Titanium Alloy and All-Ceramic Materials. Materials (Basel) 2023; 16:6240. [PMID: 37763518 PMCID: PMC10532757 DOI: 10.3390/ma16186240] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/07/2023] [Revised: 07/31/2023] [Accepted: 08/02/2023] [Indexed: 09/29/2023]
Abstract
This study aimed to evaluate the effects of surface treatments and resin cement on the adhesion of ceramic and ceramic-like materials to titanium. A total of 40 specimens (5 mm diameter) of each material (lithium disilicate glass ceramic (LDGC-IPS e.maxCAD), lithium silicate glass ceramic (LSGC-VITA Suprinity) and a polymer-infiltrated ceramic network (PICN-Vita Enamic)) were fabricated using CAD/CAM technologies. In total, 120 titanium (Ti) specimens were divided into 12 groups, and half of the titanium specimens were tribochemically coated using CoJet. The titanium and all-ceramic specimens were cemented using either Self-curing adhesive cement (SCAC-Panavia 21) or a Self-curing luting composite (SCLC-Multilink Hybrid Abutment). After 5000 cycles of thermal aging, the shear bond strength (SBS) test was conducted using a universal testing machine. The failure modes of the specimens were analyzed using stereomicroscopy, and additionally, the representative specimens were observed using Scanning Electron Microscopy. ANOVA was used for the statistical analysis (p < 0.05). The post-hoc Duncan test was used to determine significant differences between the groups. The mean SBS values (mean ± STD) ranged from 15 ± 2 MPa to 29 ± 6 MPa. Significantly higher SBS values were acquired when the titanium surface was tribochemically coated (p < 0.05). The SCLC showed higher SBS values compared to the SCAC. While the LDGC showed the highest SBS values, the PICN presented the lowest. The tribochemical coating on the cementation surfaces of the titanium increased the SBS values. The specimens cemented with the SCLC showed higher SBS values than those with the SCAC. Additionally, the SCLC cement revealed a more significant increase in SBS values when used with the LDGC. The material used for restoration has a high impact on SBS than those of the cement and surface conditioning.
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Affiliation(s)
| | - Guliz Aktas
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey; (G.A.); (M.B.G.); (D.D.); (M.M.)
| | - Mustafa Baris Guncu
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey; (G.A.); (M.B.G.); (D.D.); (M.M.)
| | - Diler Deniz
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey; (G.A.); (M.B.G.); (D.D.); (M.M.)
| | - Mehmet Muhtarogullari
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara 06100, Turkey; (G.A.); (M.B.G.); (D.D.); (M.M.)
| | - Nadin Al-Haj Husain
- Clinic of Chewing Function Disturbances and Dental Biomaterials, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland;
- Department of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3010 Bern, Switzerland
| | - Mutlu Özcan
- Clinic of Chewing Function Disturbances and Dental Biomaterials, Center of Dental Medicine, University of Zurich, 8032 Zurich, Switzerland;
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Aktas G, Guncu MB, Amini H, Turkyilmaz I, Gavras JN, Zengin HY. Fit of High-Translucency Zirconia Fixed Dental Prostheses Using Two Different Intraoral Scanners. INT J PROSTHODONT 2023; 36:498-500. [PMID: 37699191 DOI: 10.11607/ijp.8317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
PURPOSE To assess the marginal and internal fit of monolithic zirconia fixed dental prostheses (FDPs) comparing two different intraoral scanners (IOSs) and assessment methods. MATERIALS AND METHODS A maxillary typodont with three prepared teeth allowed fabrication of five-unit high-translucency monolithic zirconia FDPs. The typodont was scanned with two IOSs: Cerec Omnicam and 3Shape TRIOS 3. In total, 30 FDPs were milled from presintered high-translucency zirconia blocks. Dual-scan and silicone replica assessments were used to determine marginal and internal gaps. RESULTS A statistical significance was observed for marginal gaps (3Shape [74.27 ± 10.4 μm] and Cerec [86.45 ± 14.3 μm]) and for internal gaps (3Shape [126.12 ± 12.7 μm] and Cerec [112.38 ± 17.2 μm]). CONCLUSIONS The outcomes of this study showed that the 3Shape TRIOS 3 produced a better overall marginal fit, while the Cerec Omnicam created a better internal fit. Additionally, a greater overall marginal and internal gap was noted with the silicone replica method over the dual-scan method.
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Deniz D, Aktas G, Guncu MB, Guncu GN. A Randomized Clinical Trial of Monolithic Single-Tooth Crowns: 1-Year Preliminary Results. INT J PROSTHODONT 2023; 36:426-435. [PMID: 37699183 DOI: 10.11607/ijp.8269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 09/14/2023]
Abstract
PURPOSE To investigate the clinical results of single-tooth ceramic crowns in the posterior region produced from three different monolithic materials. MATERIALS AND METHODS A total of 36 posterior single-tooth crowns were fabricated from lithium silicate glass-ceramic (LSGC; n = 12), lithium disilicate glass-ceramic (LDGC; n = 12), and polymer-infiltrated ceramic network (PICN; n = 12) in 27 patients. Restorations were evaluated for prosthetic and periodontal criteria at baseline (0) and after 6 and 12 months. Prosthetic evaluation was performed according to the modified United States Public Health Service (USPHS) criteria, and probing depth (PD), clinical attachment level (CAL), gingival bleeding time index (GBTI), and gingival (GI) and periodontal indices (PI) were evaluated in the periodontal assessment. Friedman and Kruskal-Wallis tests were used for statistical analyses (P = .05). RESULTS All restorations were evaluated according to survival and success rates. No dropouts occurred. The survival rate of all three materials was 100% after 1 year. However, in the PICN group, a statistically significant difference was found between baseline and 12 months for color match (from A to B) and surface texture (from A to C; P < .001). CONCLUSIONS Although long-term clinical follow-up periods are needed, all three ceramics showed clinically acceptable survival and success rates over 1 year. The ceramics evaluated in the present study could be preferred for single-tooth full-crown restorations in the posterior region.
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Omar Pacha T, Aktas G, Graulich T, Stübig T, Clausen JD, Liodakis E, Omar M, Sehmisch S, Mommsen P. Predictive factors for docking site procedure in bone transport for large lower extremity segmental defects. BMC Musculoskelet Disord 2023; 24:500. [PMID: 37330489 DOI: 10.1186/s12891-023-06593-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Accepted: 06/01/2023] [Indexed: 06/19/2023] Open
Abstract
BACKGROUND Segmental bone transport is a common technique for treating large segmental bone defects. However, a docking site procedure is often necessary in segmental bone transport. To date, no prognostic factors for the need of docking site procedure have been reported. Thus, the decision is often made at random, based on the surgeon's subjective judgment and experience. The aim of this study was to identify prognostic factors for the need of docking site operation. METHODS Patients with segmental bone transport in lower extremity bone defects were included regardless of age, aetiology, and defect size. We excluded patients undergoing treatments that were not yet completed, and those who discontinued therapy by any reason. The need for docking site operation was modelled with logistical and linear regression as well as univariate analysis of variances (ANOVA). Receiver operating characteristics (ROC) curve analysis was also performed. RESULTS Twenty-seven patients from age 12 to 74 years (mean age: 39.07 ± 18.20 years) were included. The mean defect size was 76.39 ± 41.10 mm. The duration of transport (days) showed a significant influence (p = 0.049, 95%CI: 1.00-1.02) on the need for docking site operation. No other significant influences were detected. CONCLUSION A link between the duration of transport and the need for docking site operation was detected. Our data showed that if a threshold of about 188 days is exceeded, docking surgery should be considered.
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Affiliation(s)
- T Omar Pacha
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany.
| | - G Aktas
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany
| | - T Graulich
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany
| | - T Stübig
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany
| | - J D Clausen
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany
| | - E Liodakis
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany
| | - M Omar
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany
| | - S Sehmisch
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany
| | - P Mommsen
- Trauma Department, Hannover Medical School (MHH), Lower Saxony, Germany
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Gunel A, Guncu MB, Uzel SM, Aktas G, Arikan H, Reiss N, Turkyilmaz I. Analysis of the impact of various finish line designs and occlusal morphologies on the accuracy of digital impressions. J Dent Sci 2023. [DOI: 10.1016/j.jds.2023.02.017] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/05/2023] Open
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Pacha TO, Mommsen P, Brauckmann V, Aktas G, Krempec M, Wilhelmi B, Clausen JD, März V, Krezdorn N, Vogt PM, Sehmisch S, Hinrichs JB, Ernst J. [Interdisciplinary extremity board in the treatment of complex injuries]. Unfallchirurgie (Heidelb) 2023; 126:175-183. [PMID: 36746799 DOI: 10.1007/s00113-023-01290-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Accepted: 01/03/2023] [Indexed: 02/08/2023]
Abstract
BACKGROUND Interdisciplinary case conferences are well-established in the field of oncology in order to provide the best possible treatment for patients with complex disease patterns which overlap several disciplines. METHODS After studying the available literature the aims, indications, frequency, patient enrolment and documentation modalities, disciplines necessary to create the reconstruction plan and evaluation parameters of the board, were agreed in an interdisciplinary discussion among colleagues. The utilization of the extremity board and demographic features of the cases presented in the extremity board within the first 6 months were subsequently descriptively analyzed. RESULTS The agreed primary aim of an extremity board is the timely and transparent preparation of a high-quality holistic reconstruction plan for optimized treatment of a challenging patient collective with complex injuries of the extremities. Decisive interfaces of an extremity board are the participation of interdisciplinary disciplines, established enrolment and documentation modalities and a longitudinal analysis of parameters of the acute medical treatment, the long-term function and quality of life of those affected. The patient collective so far mostly includes men under 40 years old with traumatic soft tissue defects and combined injuries. On average, reconstruction plans for 1-2 patients were approved in an interdisciplinary team per session. CONCLUSION The extremity board serves as a platform for coordinated planning of treatment for patients with complex injuries. The limited personnel and time resources represent the greatest challenge for the successful implementation. The extremity board enables a high degree of interdisciplinary networking. The digital registration and documentation modality within the internal hospital documentation system is of utmost relevance. The preparation of the reconstruction plan is of decisive importance for the qualitative success of treatment and the restoration of function. The longitudinal analysis of appropriate parameters is imperative to measure the quality of treatment.
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Affiliation(s)
- T Omar Pacha
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland.
| | - P Mommsen
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland
| | - V Brauckmann
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland
| | - G Aktas
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland
| | - M Krempec
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland
| | - B Wilhelmi
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland
| | - J-D Clausen
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland
| | - V März
- Klinik für Plastische, Ästhetische, Hand- und Wiederherstellungschirurgie, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - N Krezdorn
- Klinik für Plastische, Ästhetische, Hand- und Wiederherstellungschirurgie, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - P M Vogt
- Klinik für Plastische, Ästhetische, Hand- und Wiederherstellungschirurgie, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - S Sehmisch
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland
| | - J B Hinrichs
- Klinik für Diagnostische und Interventionelle Radiologie, Medizinische Hochschule Hannover, Hannover, Deutschland
| | - J Ernst
- Klinik für Unfallchirurgie, Medizinische Hochschule Hannover, Carl-Neuberg-Straße 1, 30625, Hannover, Deutschland
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Guncu MB, Aktas G, Turkyilmaz I, Gavras JN. Performance of high-translucent zirconia CAD/CAM fixed dental prostheses using a digital workflow: A clinical study up to 6 years. J Dent Sci 2023; 18:44-49. [PMID: 36643237 PMCID: PMC9831836 DOI: 10.1016/j.jds.2022.07.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 07/30/2022] [Indexed: 01/18/2023] Open
Abstract
Background/purpose Zirconia has recently become a popular material for fixed restorations. The purpose of this study was to use a digital workflow to fabricate monolithic zirconia fixed dental prostheses (FDPs) and assess the connection between variable connector sizes compared to their clinical performance. Materials and methods Clinicians evaluated monolithic zirconia FDPs in 58 patients. After definitive impressions were made, stone casts were obtained. The stone casts were scanned to a standard triangle language (STL) file. A digital wax up was fabricated, and corresponding provisional restorations were milled. Final FDPs were fabricated from a high-translucent zirconia material. During digital fabrication, the connector area of each FDP was recorded while meticulous attention was paid to ensure that the connector cross-sectional area was ≥9 mm2 for the 3-unit restorations (pontic to retainer) and ≥12 mm2 for the 4-unit restorations (pontic to pontic). Biological an technical outcomes of the FDPs were performed at 1 week, 6 months and then annually for 6 consecutive years. Results A total of 23 men and 35 women received a total of 63 full-contour zirconia FDPs in the posterior regions and were observed for a time period ranging between 50 and 70 months. No decementation occurred and no caries were detected during the observation period, however signs of gingivitis were detected in 4 patients. The dimension of the connector areas was 12 mm2 in the two broken 4-unit FDPs. Conclusion The results of this study suggest that the use of digital scanning and milling to fabricate monolithic zirconia FDPs of posterior regions may be an acceptable alternative restorative approach to traditional metal-ceramic restorations.
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Affiliation(s)
- Mustafa Baris Guncu
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Guliz Aktas
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Ilser Turkyilmaz
- Department of Prosthodontics, New York University College of Dentistry, New York, NY, USA,Corresponding author. New York University College of Dentistry, Department of Prosthodontics, 380 Second Avenue, Suite 302, New York, NY, 10010, USA.
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Arikan H, Muhtarogullari M, Uzel SM, Guncu MB, Aktas G, Marshall LS, Turkyilmaz I. Accuracy of digital impressions for implant-supported complete-arch prosthesis when using an auxiliary geometry device. J Dent Sci 2023; 18:808-813. [PMID: 37021239 PMCID: PMC10068489 DOI: 10.1016/j.jds.2023.01.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Revised: 01/12/2023] [Indexed: 01/25/2023] Open
Abstract
Background/purpose Digital impressions using intraoral scanners have recently gained popularity. The aim of the present study was to evaluate the fit of full-arch screw-retained cobalt-chromium frameworks fabricated via two different digital impression methods. Materials and methods An edentulous resin master model with four dental implants was fabricated. Forty cobalt-chromium superstructures were fabricated and evaluated according to four groups. In Group 1, the superstructures were evaluated using an intraoral scanner to generate digital impressions. Group 2 relied on the help of an auxiliary geometric appliance in generation of digital impressions via intraoral scanner. The traditional method of splinted open-tray conventional impressions was designated for Group 3. Finally, the control group (Group 4) relied on scanning of the master model directly with a laboratory scanner. Vertical marginal discrepancy was evaluated, and data obtained were statistically analyzed. Results The highest mean vertical marginal gap value (80.86 ± 50.06 μm) was observed for Group 1 and statistically higher than Group 2, 3, and 4 (P < 0.05). The lowest mean vertical marginal gap value (41.98 ± 26.33 μm) was measured from Group 4 and statistically similar to Group 2 and 3 (P > 0.05). Conclusion It has been suggested that the use of auxiliary geometric appliances yields increased scanning accuracy. Frameworks fabricated using the traditional splinted open-tray technique were more reliable compared to those frameworks from digital impressions.
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Kus T, Isbilen E, Aktas G, Arak H. 326P The predictive value of vitamin D follow-up and replacement on recurrence in patients with colorectal cancer. Ann Oncol 2022. [DOI: 10.1016/j.annonc.2022.07.464] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Guncu MB, Aktas G, Guncu GN, Anıl D, Turkyilmaz I, Antonoff LR. Clinical, Technical, and Radiologic Outcomes of 182 Implant-Supported Zirconia Single Crowns Using Titanium-Base Abutments: A Retrospective Study. INT J PROSTHODONT 2022; 35:553–559. [PMID: 35323829 DOI: 10.11607/ijp.7796] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE To evaluate the biologic, technical, and radiographic outcomes of CAD/CAM-milled bilayer and monolithic zirconia crowns using implants and Ti-base abutments with up to 5 years of follow-up. MATERIALS AND METHODS A total of 182 implant-supported "screw-mentable" (hybrid screw/cement retention) single crowns were evaluated in 118 patients. Ti-base abutments were selected according to the chimney (3.5 or 5 mm) and gingival (1, 2, or 3 mm) heights in the virtual model. Zirconia crowns were designed using CAD/CAM software and then milled from partially stabilized zirconia blocks. After all crowns were cemented onto Ti-base abutments, they were clinically screwed onto the implants. Both implants and crowns were followed up for up to 5 years, and their clinical, technical, and radiologic results were recorded. RESULTS A total of 118 patients (86 women and 32 men) who received 182 implant-supported screw-mentable crowns were included in this study. The mean follow-up period was 32 ± 18 months (range: 24 to 60 months) for all implants and crowns. No implant was lost during the follow-up period, yielding a cumulative implant survival rate of 100%. Two technical complications were observed in two bruxer patients, yielding a cumulative restoration survival rate of 98.9%. The marginal bone loss was 0.7 ± 0.5 mm from the baseline radiograph to the radiograph taken at the final recall visit. No implants were diagnosed with peri-implantitis. CONCLUSION The outcomes of this study suggest that Ti-base abutments are a feasible and affordable alternative to CAD/CAM abutments and that they can successfully support single zirconia crowns.
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Uluc IG, Guncu MB, Aktas G, Turkyilmaz I. Comparison of marginal and internal fit of 5-unit zirconia fixed dental prostheses fabricated with CAD/CAM technology using direct and indirect digital scans. J Dent Sci 2022; 17:63-69. [PMID: 35028021 PMCID: PMC8739750 DOI: 10.1016/j.jds.2021.07.012] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 07/09/2021] [Indexed: 12/19/2022] Open
Abstract
BACKGROUND/PURPOSE Advancements in digital dentistry and the development of intraoral scanners (IOS) have provided clinicians with an accurate and efficient alternative to analog impressions. The aim of this study was to assess the accuracy of the marginal and internal fit of 5-unit monolithic zirconia fixed dental prostheses (FDPs) fabricated with CAD/CAM technology using direct and indirect digitalization methods. MATERIAL AND METHODS Three teeth in a maxillary typodont model were prepared to receive a 5-unit zirconia FDP. Six different groups were created according to the type of scanner (intraoral and extraoral) and the type of workflow. For direct workflow, the typodont was scanned with two different IOS (3Shape Trios 3 [3S-IOS] and Cerec Omnicam [C-IOS]). For indirect workflow, after conventional impressions were obtained, the impressions (IMP) were scanned with two different laboratory scanners (3S-IMP and C-IMP). After the impressions were poured, the stone (STN) casts were scanned with the same laboratory scanners (3S-STN and C-STN). Sixty 5-unit monolithic zirconia FDPs (10 in each group) were designed and milled. The marginal and internal fit was assessed. RESULTS The mean marginal gap values were 78.2±9 μm in the IOS group, 82.6± 9 μm in the IMP group, and 82.6±9 μm in the STN group, indicating no statistically significant differences among groups (p > 0.05). The mean axial gap values were 77.7 ± 10 μm in IOS group, 83.61 ± 15 μm in the IMP group, and 84.5±9 μm in the STN group, indicating no statistically significant differences among groups (p > 0.05). CONCLUSION The marginal and internal fit of 5-unit monolithic zirconia FDPs fabricated with direct and indirect digital scans were similar. The smallest gap values were observed at the marginal region while the greatest gap values were detected at the occlusal region.
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Affiliation(s)
- Irem Gokce Uluc
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Mustafa Baris Guncu
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Guliz Aktas
- Department of Prosthodontics, School of Dentistry, Hacettepe University, Ankara, Turkey
| | - Ilser Turkyilmaz
- New York University College of Dentistry, Department of Prosthodontics, New York, NY, USA
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Isbilen E, Kus T, Cinkir HY, Aktas G, Buyukbebeci A. 174P Better survival associated with successful vitamin D supplementation in non-metastatic breast cancer survivors. Ann Oncol 2021. [DOI: 10.1016/j.annonc.2021.08.455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022] Open
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15
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Bilgin S, Aktas G, Kahveci G, Atak BM, Kurtkulagi O, Duman TT. Does mean platelet volume/lymphocyte count ratio associate with frailty in type 2 diabetes mellitus? ACTA ACUST UNITED AC 2021; 122:116-119. [PMID: 33502879 DOI: 10.4149/bll_2021_017] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVES Frailty is a common problem in patients with type 2 diabetes mellitus (T2DM). It is considered to be associated with inflammation. Novel markers derived from hemogram, such as neutrophil/lymphocyte ratio (NLR) and mean platelet volume/lymphocyte ratio (MPVLR), are proposed as inflammatory markers. In present study, we aimed to compare NLR and MPVLR levels of frail patients with T2DM to non‑frail diabetic subjects. METHODS Diabetic subjects were grouped in frail and non-frail groups according to the Edmonton Frail Scale. General characteristics and laboratory data of the frail and non-frail groups were compared. RESULTS The MPVLR of the frail (3.9 [1.4-13.2] %) group was significantly higher than that of the non-frail (3.4 [1.5-6.9] %) group (p = 0.02). MPVLR was positively and significantly correlated with Edmonton Frail Scale score (r = 0.21, p = 0.03). A MPVLR level greater than 3.41 % has 71 % sensitivity and 51 % specifity in predicting frailty. CONCLUSION We suggest that elevated MPVLR could be a finding that marks frailty in diabetic subjects. Inexpensive and easy‑to‑assess nature of the MPVLR may be useful in predicting frailty in type 2 diabetic population (Tab. 2, Fig. 1, Ref. 32).
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16
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Kocak MZ, Aktas G, Atak B, Bilgin S, Kurtkulagi O, Duman TT, Ozcil IE. THE ASSOCIATION BETWEEN VITAMIN D LEVELS AND HANDGRIP STRENGTH IN ELDERLY MEN. Acta Endocrinol (Buchar) 2020; 16:263-266. [PMID: 33029248 DOI: 10.4183/aeb.2020.263] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Context Vitamin D is a steroid hormone that acts by binding to the vitamin D receptor (VDR) found in many tissues. According to the long-term mechanism, vitamin D causes the proliferation and differentiation of muscle cells by gene transcription. Objective We aimed to evaluate the relationship between muscle strength and serum vitamin D levels in elderly men. Design Cross-sectional study. Subjects and Methods Male patients over age 50 were included in the study. Study population was divided into 2 groups with handgrip strength according to body mass index, either as subjects with weak or with normal handgrip strength test (HGST). Vitamin D levels and other variables compared between weak and normal groups. Results Vitamin D level of weak and normal groups were 7.5 (3-19.9) μg/L, and 11.6 (11.6-34.9) μg/L, which means significant reduced vitamin D levels in weakness group (p=0.01). Vitamin D levels were significantly correlated with HGST levels (r:0.362, p=0.001). Vitamin D levels were found to be an independent predictor of weakness according to HGST in logistic regression analysis (OR: 0.453, 95% Cl:0.138-0.769, p=0.05). Conclusions Low vitamin D level is an independent risk factor for muscle weakness in men aged more than 50 years. Therefore, vitamin D levels should be screened and early replacement should be initiated for the sake of improvement of muscle strength in elderly subjects that vulnerable for frailty.
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Affiliation(s)
- M Z Kocak
- Abant Izzet Baysal University Hospital, Department of Internal Medicine, Bolu, Turkey
| | - G Aktas
- Abant Izzet Baysal University Hospital, Department of Internal Medicine, Bolu, Turkey
| | - B Atak
- Abant Izzet Baysal University Hospital, Department of Internal Medicine, Bolu, Turkey
| | - S Bilgin
- Abant Izzet Baysal University Hospital, Department of Internal Medicine, Bolu, Turkey
| | - O Kurtkulagi
- Abant Izzet Baysal University Hospital, Department of Internal Medicine, Bolu, Turkey
| | - T T Duman
- Abant Izzet Baysal University Hospital, Department of Internal Medicine, Bolu, Turkey
| | - I E Ozcil
- Abant Izzet Baysal University Hospital, Department of Internal Medicine, Bolu, Turkey
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17
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Aktas G, Guncu MB, Akcin ET, Cakan U, Canay S. Effect of Anti-Rotational Abutment Features and Novel Computerized Fabrication Techniques on the Marginal Fit of Implant-Supported Metal Copings. J Prosthodont 2020; 30:252-256. [PMID: 32964601 DOI: 10.1111/jopr.13263] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/11/2020] [Indexed: 11/29/2022] Open
Abstract
PURPOSE An in vitro study to compare the marginal fit of cobalt-chromium (Co-Cr) metal copings fabricated with selective laser melting (SLM), computer-aided design and computer-aided manufacturing (CAD/CAM) milling, and lost-wax (LW) techniques, on abutments with two different antirotational features. MATERIALS AND METHODS A total of 60 stainless steel abutments with the same length and convergence angles were fabricated using a numerical control machining. Half of the abutments had one flat plane, while the other half had three grooves as an antirotation feature. Thirty abutments of each kind were then divided into three subgroups, and metal copings were fabricated with SLM, CAD/CAM milling, or the LW technique (n = 10). The metal copings were cemented with polycarboxylate cement. Marginal gap measurements were performed using a stereomicroscope at a magnification of × 45 and data were analyzed with two-way analysis of variance (ANOVA) tests. RESULTS The LW (p = 0.002) and CAD/CAM (p < 0.001) techniques exhibited increased marginal gaps on the abutments with a three groove antirotational feature; however, no significant difference was detected with the SLM technique (p = 0.259). The copings fabricated with the SLM technique demonstrated significantly lower gap values in both abutment types (p < 0.001). CONCLUSION While all marginal gap values were within the clinically acceptable range (<120 µm), abutments with more antirotational grooves exhibited wider marginal gaps with the LW and CAD/CAM techniques.
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Affiliation(s)
- Guliz Aktas
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Mustafa Baris Guncu
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
| | - Elif Tuba Akcin
- Department of Prosthodontics, Faculty of Dentistry, Lokman Hekim University, Ankara, Turkey
| | - Umut Cakan
- Department of Prosthodontics, Faculty of Dentistry, Istanbul Medipol University, Istanbul, Turkey
| | - Senay Canay
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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18
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Kurtkulagi O, Aktas G, Bilgin S, Meryem Atak B, Taslamacioglu Duman T, Emin Demirkol M. Combined antihypertensive treatment is better than mono-therapy in hypertensive patients. Neth J Med 2020; 78:239-243. [PMID: 33093247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
BACKGROUND Hypertension (HT) is a chronic condition associated with serious complications. In the present cross-sectional study, we aimed to analyse factors that contribute to blood pressure control in subjects with HT. METHODS Subjects with HT admitted to outpatient internal medicine clinics of the institution were enrolled in the study. According to the Joint National Committee (JNC) VIII criteria, subjects with a mean blood pressure above target levels were defined as poorly-controlled hypertensive patients and others were grouped as well-controlled hypertensive patients. Clinical and laboratory parameters were compared between study groups. RESULTS Smokers were more prevalent in the poorly-controlled HT group compared to the well-controlled HT group (p = 0.001). The number of patients who adhered to dietary and exercise recommendations were greater in well-controlled HT group than poorly-controlled HT group (p < 0.001 for both). The rate of combined therapy was greater in well-controlled HT group compared to poorly-controlled HT group (p = 0.04). CONCLUSIONS We suggest that, in addition to dietary and exercise recommendations and smoking cessation, treatment with combination therapy could be better in reaching blood pressure targets in patients with HT.
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Affiliation(s)
- O Kurtkulagi
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
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19
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Kus T, Kose F, Aktas G, Yalcintas U, Sedef A, Cinkir H, Dirikoc M, Akkus G, Ozdemir N. P-110 Prediction of peritoneal recurrence in patients with gastric cancer: A multicenter study. Ann Oncol 2020. [DOI: 10.1016/j.annonc.2020.04.192] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
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20
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Karabekmez D, Aktas G. Single anterior tooth replacement with direct fiber-reinforced composite bridges: A report of three cases. Niger J Clin Pract 2020; 23:434-436. [PMID: 32134047 DOI: 10.4103/njcp.njcp_286_19] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
In today's dentistry, with the development of adhesive techniques and the improvement of resin-based materials, invasive restorative treatments have been replaced by minimally invasive or noninvasive restorative procedures. Fiber-reinforced adhesive bridges are minimal-invasive or noninvasive restorations that can be applied for definitive restoration in single tooth loss or short spans, where teeth or implant-supported fixed partial prosthesis cannot be applied. This case series describes the rehabilitation of three patients with anterior single tooth loss using the direct fiber-reinforced adhesive bridge. In all patients, esthetic and functional deficiencies in the missing tooth regions were solved with this minimally invasive technique, which is both cost-effective and conservative of tooth structures. During the three-year follow-up of these cases, there was neither fracture nor decementation in the restorations. Also, no caries or sensitivity was noted in the support teeth.
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Affiliation(s)
- D Karabekmez
- Department of Prosthodontics, Faculty of Dentistry, Baskent University, Ankara, Turkey
| | - G Aktas
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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21
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Aktas G, Burduroglu D, Guncu MB, Keyf F, Özcan M. Clinical Survival of Indirect, Anterior Surface-Retained Fiber-Reinforced Composite Fixed Dental Prosthesis: Up to 3-Year Follow-up. Eur J Prosthodont Restor Dent 2019; 27:90-94. [PMID: 31145560 DOI: 10.1922/ejprd_01651aktas05] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 02/27/2019] [Accepted: 04/29/2019] [Indexed: 11/11/2022]
Abstract
This study evaluated the performance of indirect, anterior, surface-retained, fiber-reinforced-composite restorations (ISFRCR). Between September-2011 and September-2012, 17 patients (13 females, 4 males, mean age: 40.5) received 17 indirect ISFRCRs (maxilla=4; mandible=13). All restorations were made on a plaster model using unidirectional E-glass fibers (Interlig, Angelus) in combination with a veneering resin composite (Gradia, GC) and cemented adhesively (Choice 2, Bisco). No cavity preparations were made on the abutmentteeth. Before cementation, enamel surfaces were cleaned with pumice and etched with 38% H3PO4 for 30 s, rinsed 30 s. Then, adhesive resin was applied accordingly. Patients were followed every 3 months until May 2014. The evaluation protocol involved technical (chipping, debonding or fracture of tooth/restoration) and biological failures (caries). Survival (Kaplan Meier) and annual failure rates were calculated. Mean observation time was 34.6 months. Altogether, 5 failures were observed [survival rate: 70.5%] of which 3 were debondings and 2 delaminations of the veneering composite (chipping). All defective restorations were repaired or recemented, except one, which was remade.
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Affiliation(s)
- G Aktas
- University of Hacettepe, Department of Fixed and Removable Prosthodontics, Ankara, Turkey
| | - D Burduroglu
- Bezmialem Vakif University, Faculty of Dentistry, Department of Prosthodontics, Istanbul, Turkey
| | - M B Guncu
- University of Hacettepe, Department of Fixed and Removable Prosthodontics, Ankara, Turkey
| | - F Keyf
- University of Hacettepe, Department of Fixed and Removable Prosthodontics, Ankara, Turkey
| | - M Özcan
- University of Zurich, Dental Materials Unit, Center for Dental and Oral Medicine, Clinic for Fixed and Removable Prosthodontics and Dental Materials Science, Zurich, Switzerland
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Guncu MB, Tuba Akcin E, Aktas G, Aslan Y. Accuracy of CAD CAM manufacturing techniques on marginal and internal fit of 5-unit implant-supported Co-Cr frameworks. Clin Oral Implants Res 2018. [DOI: 10.1111/clr.47_13358] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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23
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Aktas G, Çelik Emral G, Muhtarogullari M, Baris Guncu M, Canay S. Influence of connector area and abutment material on fracture strength of implant-supported cantilevered zirconia and metal frameworks. Clin Oral Implants Res 2018. [DOI: 10.1111/clr.65_13358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Guliz Aktas
- Faculty of Dentistry, Hacettepe University, Turkey
| | | | | | - Mustafa Baris Guncu
- Department of Periodontics, Faculty of Dentistry, Hacettepe University, Turkey
| | - Senay Canay
- Department of Periodontics, Faculty of Dentistry, Hacettepe University, Turkey
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24
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Gokce Uluc I, Baris Guncu M, Aktas G, Guncu GN. Clinical evaluation of screw retained monolithic crowns with titanium resin based abutments. Clin Oral Implants Res 2018. [DOI: 10.1111/clr.243_13358] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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25
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Sit M, Catal O, Aktas G, Yilmaz EE, Tosun M, Savli H. Serum amyloid A and Omentin levels in acute appendicitis: a preliminary study for a novel diagnostic approach. Clin Ter 2016; 165:e35-8. [PMID: 24589958 DOI: 10.7471/ct.2014.1669] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND The diagnosis of acute appendicitis is based on medical history and physical examination. Serum (S) amiloid A (AA) levels are elevated in many inflammatory conditions. Omentin is a recently discovered adipokine showing decreased levels associated with inflammatory conditions. We aimed to measure SAA and omentin levels in patients with acute appendicitis. MATERIALS AND METHODS 36 patients with a diagnosis of acute appendicitis and 30 healthy subjects were enrolled to this research study. A statistical analysis was performed using IBM SPSS Statistics Version 16.0 (SPSS Inc.®, Chicago, IL, United States). RESULTS Patients in study group were significantly older than healthy control subjects (p=0.013). Body mass index of the patients with acute appendicitis (23.2 ± 1.3) was greater than that of the control group (22.7 ± 1), but the difference did not reach the statistically significance (p=0.076). ). Mean level of SAA was significantly raised in study group compared to healthy control subjects (p< 0.001). Mean omentin level was significantly lower in study group compared to healthy subjects (p=0.013). CONCLUSIONS In conclusion, although diagnosis of acute appendicitis is mostly based on clinical findings, omentin and especially SAA measurement in serum may help surgeons to avoid negative laparatomy.
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Affiliation(s)
- M Sit
- Departments of General Surgery, Abant Izzet Baysal University Hospital, Bolu
| | - O Catal
- Department of General Surgery, Ardahan State Hospital, Ardahan, Turkey
| | - G Aktas
- Departments of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu
| | - E E Yilmaz
- Departments of General Surgery, Abant Izzet Baysal University Hospital, Bolu
| | - M Tosun
- Departments of Biochemistry, Abant Izzet Baysal University Hospital, Bolu
| | - H Savli
- Departments of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu
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Kus T, Aktas G, Kalender M, Sevinc A, Camci C. P53 and ERCC1 gene polymorphisms can predict the recurence risk of breast cancer. Ann Oncol 2016. [DOI: 10.1093/annonc/mdw364.42] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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27
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Aldemir M, Turkeli M, Hacioglu B, Sakin A, Yaman E, Coban E, Koca D, Karaca M, Simsek M, Bahceci A, Sen E, Eren T, Aliustaoglu B, Sakalar T, Kalkan N, Aktas G, Bilici M, Turhal S, Benekli M, Tekin S. Efficacy and tolerability of first-line chemotherapy in elderly patients (age ≥70 years) with metastatic gastric cancer: a multicenter study of the Anatolian Society of Medical Oncology (ASMO). Ann Oncol 2016. [DOI: 10.1093/annonc/mdw371.42] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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28
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Kalender M, Bulbul F, Aktas G, Kus T, Okyar B, Balakan O, Camci C. Awareness of cancer diagnosis in Turkish patients can increase anxiety and depression: is it true? Ann Oncol 2016. [DOI: 10.1093/annonc/mdw390.72] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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29
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Aktas G, Yerlikaya H, Akca K. Mechanical Failure of Endocrowns Manufactured with Different Ceramic Materials: An In Vitro Biomechanical Study. J Prosthodont 2016; 27:340-346. [PMID: 27465810 DOI: 10.1111/jopr.12499] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2016] [Indexed: 11/30/2022] Open
Abstract
PURPOSE To evaluate the effect of different silica-based ceramic materials on the mechanical failure behavior of endocrowns used in the restoration of endodontically treated mandibular molar teeth. MATERIALS AND METHODS Thirty-six intact mandibular molar teeth extracted because of a loss of periodontal support received root canal treatment. The teeth were prepared with a central cavity to support the endocrowns, replacing the occlusal surface with mesial-lingual-distal walls. Data acquisition of the prepared tooth surfaces was carried out digitally with a powder-free intraoral scanner. Restoration designs were completed on manufactured restorations from three silicate ceramics: alumina-silicate (control), zirconia-reinforced (Zr-R), and polymer-infiltrated (P-I). Following adhesive cementation, endocrowns were subjected to thermal aging, and then, each specimen was obliquely loaded to record the fracture strength and define the mechanical failure. For the failure definition, the fracture type characteristics were identified, and further analytic measurements were made on the fractured tooth and ceramic structure. RESULTS Load-to-fracture failure did not differ significantly, and the calculated mean values were 1035.08 N, 1058.33 N, and 1025.00 N for control, Zr-R, and P-I groups, respectively; however, the stiffness of the restoration-tooth complex was significantly higher than that in both test groups. No statistically significant correlation was established in paired comparisons of the failure strength, restorative stiffness, and fractured tooth distance parameters. The failure mode for teeth restored with zirconia-reinforced glass ceramics was identified as non-restorable. The resin interface in the control and P-I groups presented similar adhesive failure behavior. CONCLUSION Mechanical failure of endocrown restorations does not significantly differ for silica-based ceramics modified either with zirconia or polymer.
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Affiliation(s)
- Guliz Aktas
- Department of Prosthodontics, Hacettepe University, Ankara, Turkey
| | - Hatice Yerlikaya
- Department of Prosthodontics, Hacettepe University, Ankara, Turkey
| | - Kivanc Akca
- Department of Prosthodontics, Hacettepe University, Ankara, Turkey
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Aktas G, Young H, Moyes A, Badur S. Evaluation of the Serodia Treponema pallidum particle agglutination, the Murex Syphilis ICE and the Enzywell TP tests for serodiagnosis of syphilis. Int J STD AIDS 2016; 16:294-8. [PMID: 15899082 DOI: 10.1258/0956462053654195] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
We evaluated the Treponema pallidum haemagglutination assay (TPHA), a treponemal test, with three other treponemal tests, the Serodia T. pallidum particle agglutination assay, the Murex Syphilis ICE IgG + IgM enzyme immunoassay (EIA) and the Enzywell TP IgG + M EIA (a new rapid EIA) for use in conjunction with the rapid plasma reagin test (RPR), a non-treponemal test, for serodiagnosis of syphilis. In all, 124 serum samples were found reactive with RPR and/or TPHA after testing by the routine laboratory protocol. Twenty-three (18.5%) of them were positive only by RPR test and were evaluated as biologically false-positive, 16 were positive only by the TPHA and 84 by both the RPR and TPHA tests; one sample was non-specific (heterophile reaction) in the TPHA. Agreements of the TPHA with the Serodia TPPA, the Murex Syphilis ICE and the Enzywell TP tests were 96.7%, 100% and 99.1%, respectively. We conclude that each one of the tests, the Serodia TPPA, the Murex Syphilis ICE and the Enzywell TP, is an appropriate substitute for screening for serodiagnosis of syphilis.
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Affiliation(s)
- G Aktas
- Department of Microbiology and Clinical Microbiology, Istanbul Medical Faculty, University of Istanbul, 34390 Capa, Istanbul, Turkey.
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Sit M, Aktas G, Yilmaz EE, Alcelik A, Terzi EH, Tosun M. Effects of the inflammatory response on serum omentin levels in early acute and chronic pancreatitis. Clin Ter 2015; 165:e148-52. [PMID: 24770824 DOI: 10.7471/ct.2014.1699] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND AND AIMS Acute pancreatitis is an acute inflammation of the parenchyma of the pancreas. Several adipokines have been investigated in acute pancreatitis, and these cytokines contribute to inflammation in acute pancreatitis. However, not enough data exist regarding omentin in injuries of the pancreas. Because of a possible common pathogenesis, we aimed to study the association between pancreatic damage and serum omentin levels. MATERIALS AND METHODS Twenty-four Sprague Dowley rats weighing 200-250 g were randomly placed into three groups: a sham group (n=8), an acute pancreatitis group (n=8), and a chronic pancreatitis group (n=8). Both rats in the sham group underwent laparotomy, and 0.1 cc of saline solution was injected through the pancreatic canal. On the seventh day, a blood sample was obtained by abdominal aorta puncture, and the pancreas was resected for histological examination. In the acute and chronic pancreatitis groups, 0.1 cc of 4.5% Sodium Taurocholote was injected through the pancreatic canal. Blood samples were obtained and pancreatic resection was performed after 24 hours for the acute pancreatitis group and after 7 days for the chronic pancreatitis group. RESULTS Serum omentin levels of rats with chronic pancreatitis (49.37±2.82 ng/ml) were increased compared to both acute pancreatitis (37.79±1.24 ng/ml) (p<0.01) and sham rats (22.49±1.4 ng/ml) (p<0.01). In addition, the omentin level of rats with acute pancreatitis was significantly increased compared to the sham group (p<0.01). CONCLUSIONS The elevation in omentin levels in rats in the early stage of pancreatitis was due to the anti-inflammatory effects of omentin; hence, elevated omentin levels improved insulin resistance and caused a significant reduction in glucose levels.
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Affiliation(s)
- M Sit
- Departments of General Surgery, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - G Aktas
- Departments of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - E E Yilmaz
- Departments of General Surgery, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - A Alcelik
- Departments of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - E H Terzi
- Departments of Hystology, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - M Tosun
- Departments of Biochemistry, Abant Izzet Baysal University Hospital, Bolu, Turkey
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Aktas G, Alcelik A, Yalcin A, Karacay S, Kurt S, Akduman M, Savli H. Treatment of iron deficiency anemia induces weight loss and improves metabolic parameters. Clin Ter 2015; 165:e87-9. [PMID: 24770833 DOI: 10.7471/ct.2014.1688] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND The treatment of iron deficiency anemia is oral iron replacement which has side effects mostly related with gastrointestinal system. A significant rate of the patients that discontinuing the treatment complained of weight gain during treatment in our clinical practise, despite, oral iron preparations are not known to have such a side effect in adults. Therefore, we planned to investigate this myth whether iron preparations cause an increase in weight, waist circumference, body mass index and laboratory metabolic parameters that may accompany to weight gain. MATERIALS AND METHODS Twenty-one women admitted to our out-patient clinics with iron deficiency anemia were enrolled to the study. Waist circumference, body weight, body mass index, systolic and diastolic blood pressures, hemogram and other laboratory parameters assessed and recorded at the first visit and repeated 4 to 6 moths after initiation of treatment. RESULTS Waist circumference, body weight and BMI significantly reduced in patients after treatment compared to pre-treatment period. Moreover, HDL was increased and triglyceride was decreased significantly in after treatment compared to pre-treatment period. CONCLUSIONS We suggest that treatment of iron deficiency may improve not only haematological but also metabolic and anthropometric parameters. Due to the small study population of our cohort, larger prospective studies are needed to confirm our results.
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Affiliation(s)
- G Aktas
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - A Alcelik
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - A Yalcin
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - S Karacay
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - S Kurt
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - M Akduman
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - H Savli
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
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Abstract
BACKGROUND Acute mesenteric ischemia (AMI) is an intestinal vascular disease with high mortality. Clinical diagnosis of acute mesenteric ischemia is difficult. Adipose tissue is an important mediator of metabolism and inflammation.Omentin is produced by visceral adipose tissue and decreased serum levels of omentin are associated with poor metabolic outcomes. We aimed to investigate whether serum omentin level predicts early diagnosis of AMI before development of transmural ischemia. METHODS Twenty-four Sprague Dawley rats weighted about 200-250 gr grouped in 3 experimental groups as sham, transient ischemia and permanent ischemia. Each group consisted of 8 rats. Blood samples were evaluated to determine serum urea, creatinine, omentin and C-reactive protein (CRP) levels. A blinded histological examination performed with the same histologist for hemotoxileneosine painted ileal tissue samples. RESULTS Mean serum omentin level in sham group (27.5±4.67) was significantly elevated compared to rats in Ischemia-reperfusion (IR) group (10.9±9.01).The difference reached the statistical significance (p=0.004). Serum omentin levels were not correlated to urea, creatinine or CRPlevels. CONCLUSION Omentin levels may be a biochemical indicator to detect AMI. However, further human studies are needed (Tab. 3, Fig. 3, Ref. 34).
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Aktas G, Sit M, Dikbas O, Tekce B, Savli H, Tekce H, Alcelik A. Could Red Cell Distribution Width be a Marker in Hashimoto’s Thyroiditis? Exp Clin Endocrinol Diabetes 2014; 122:572-4. [PMID: 25380549 DOI: 10.1055/s-0034-1383564] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- G. Aktas
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - M. Sit
- Department of General Surgery, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - O. Dikbas
- Department of Endocrinology, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - B. Tekce
- Department of Medical Biochemistry, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - H. Savli
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - H. Tekce
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - A. Alcelik
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
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Tekce H, Tekce B, Aktas G, Alcelik A, Sengul E. Serum Omentin-1 Levels in Diabetic and Nondiabetic Patients with Chronic Kidney Disease. Exp Clin Endocrinol Diabetes 2014; 122:451-6. [PMID: 24918534 DOI: 10.1055/s-0034-1375674] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- H. Tekce
- Faculty of Medicine, Department of Internal Medicine, Abant Izzet Baysal University, Bolu, Turkey
| | - B. Tekce
- Faculty of Medicine, Department of Medical Biochemistry, Abant Izzet Baysal University, Bolu, Turkey
| | - G. Aktas
- Faculty of Medicine, Department of Internal Medicine, Abant Izzet Baysal University, Bolu, Turkey
| | - A. Alcelik
- Faculty of Medicine, Department of Internal Medicine, Abant Izzet Baysal University, Bolu, Turkey
| | - E. Sengul
- Department of Nephrology, Derince Education and Research Hospital, Kocaeli, Turkey
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Wheeler DC, Abdalla S, Chertow G, Parfrey P, Herzog C, Mikolasevic I, Racki S, Lukenda V, Milic S, Devcic B, Orlic L, Suttorp MM, Hoekstra T, Ocak G, Van Diepen ATN, Ott I, Mittelman M, Rabelink TJ, Krediet RT, Dekker FW, Simone S, Dell'Oglio MPS, Ciccone M, Corciulo R, Castellano G, Balestra C, Grandaliano G, Gesualdo L, Pertosa G, Nishida M, Ando M, Karasawa K, Iwamoto Y, Tsuchiya K, Nitta K, Krzanowski M, Janda K, Gajda M, Dumnicka P, Fedak D, Lis G, Ja kowski P, Litwin JA, Su owicz W, Freitas GR, Silva VB, Abensur H, Luders C, Pereira BJ, Castro MC, Oliverira RB, Moyses RM, Elias RM, Silva BC, Tekce H, Ozturk S, Aktas G, Kin Tekce B, Erdem A, Ozyasar M, Taslamacioglu Duman T, Yazici M, Kirkpantur A, Balci MM, Turkvatan A, Afsar B, Alkis M, Mandiroglu F, Voroneanu L, Siriopol D, Nistor I, Apetrii M, Hogas S, Onofriescu M, Covic A, An WS, Kim SE, Son YK, Oh YJ, Gelev S, Toshev S, Trajceska L, Selim G, Dzekova P, Shikole A, Park J, Lee JS, Shin ES, Ann SH, Kim SJ, Chung HC, Janda K, Krzanowski M, Gajda M, Dumnicka P, Fedak D, Lis G, Litwin JA, Sulowicz W, Elewa U, Bichari W, Abo-Seif K, Seferi S, Rroji M, Likaj E, Spahia N, Barbullushi M, Thereska N, Kopecky CM, Genser B, Maerz W, Wanner C, Saemann MD, Weichhart T, Sezer S, Gurlek Demirci B, Tutal E, Bal Z, Erkmen Uyar M, Ozdemir Acar FN, Macunluoglu B, Atakan A, Ari Bakir E, Georgianos P, Sarafidis PA, Stamatiadis DN, Liakopoulos V, Zebekakis PE, Papagianni A, Lasaridis AN, Eftimovska - Otovic N, Babalj-Banskolieva E, Kostadinska-Bogdanoska S, Grozdanovski R, Aono M, Sato Y, El Amrani M, Asserraji M, Benyahia M, Lee YK, Choi SR, Cho A, Kim JK, Choi MJ, Kim SJ, Yoon JW, Koo JR, Kim HJ, Noh JW, Inagaki H, Yokota N, Sato Y, Chiyotanda S, Fukami K, Fujimoto S, Kendi Celebi Z, Kutlay S, Sengul S, Nergizoglu G, Erturk S, Ates K, Vishnevskii KA, Rumyantsev AS, Zemchenkov AY, Smirnov AV, Reinhardt B, Knaup R, Esteve Simo V, Carneiro Oliveira J, Moreno Guzman F, Fulquet Nicolas M, Pou Potau M, Saurina Sole A, Duarte Gallego V, Ramirez De Arellano Serna M, Turkmen K, Demirtas L, Akbas EM, Bakirci EM, Buyuklu M, Timuroglu A, Georgianos PI, Sarafidis PA, Karpetas A, Liakopoulos V, Stamatiadis DN, Papagianni A, Lasaridis AN, Taira T, Nohtomi K, Takemura T, Chiba T, Hirano T, Chang CT, Huang CC, Chen CJ, El Amrani M, Mohamed A, Benyahia M, Kanai H, Tamura Y, Kaizu Y, Kali A, Yayar O, Erdogan B, Eser B, Ercan Z, Buyukbakkal M, Merhametsiz O, Haspulat A, Yildirim T, Bozkurt B, Ayli MD, Bal Z, Erkmen Uyar M, Gokustun D, Gurlek Demirci B, Tutal E, Sezer S, Markaki A, Grammatikopoulou M, Fragkiadakis G, Stylianou K, Venyhaki M, Chatzi V, Selim G, Stojceva-Taneva O, Tozija L, Dzekova-Vidimliski P, Trajceska L, Gelev S, Petronievic Z, Sikole A, Moyseyenko V, Nykula T, Fernandes RT, Barreto DV, Rodrigues GGC, Misael A, Branco-Martins CT, Barreto FC, Yayar O, Ercan Z, Eser B, Merhametsiz O, Haspulat A, Buyukbakkal M, Erdogan B, Yildirim T, Bozkurt B, Ayli MD. DIALYSIS CARDIOVASCULAR COMPLICATIONS 1. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu155] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Bornstein J, McCullough K, Combe C, Bieber B, Jadoul M, Pisoni R, Mariani L, Robinson B, Saito A, Sen A, Tentori F, Guinsburg A, Marelli C, Marcelli D, Usvyat L, Maddux D, Canaud B, Kotanko P, Hwang SJ, Hsieh HM, Chen HF, Mau LW, Lin MY, Hsu CC, Yang WC, Pitcher D, Rao A, Phelps R, Canaud B, Barbieri C, Marcelli D, Bellocchio F, Bowry S, Mari F, Amato C, Gatti E, Zitt E, Hafner-Giessauf H, Wimmer B, Herr A, Horn S, Friedl C, Sprenger-Maehr H, Kramar R, Rosenkranz AR, Lhotta K, Ferris M, Marcelli D, Marelli C, Etter M, Xu X, Grassmann A, Von Gersdorff GD, Pecoits-Filho R, Sylvestre L, Kotanko P, Usvyat L, Consortium M, Dzekova-Vidimliski P, Nikolov I, Trajceska L, Selim G, Gelev S, Matevska Geshkovska N, Dimovski A, Sikole A, Suleymanlar G, Utas C, Ecder T, Ates K, Bieber B, Robinson BM, Pisoni RL, Laplante S, Liu FX, Culleton B, Tomilina N, Bikbov B, Andrusev A, Zemchenkov A, Bieber B, Robinson BM, Pisoni RL, Bikbov B, Tomilina N, Kotenko O, Andrusev A, Panaye M, Jolivot A, Lemoine S, Guebre-Egziabher F, Doret M, Juillard L, Filiopoulos V, Hadjiyannakos D, Papakostoula A, Takouli L, Biblaki D, Dounavis A, Vlassopoulos D, Bikbov B, Tomilina N, Al Wakeel J, Bieber B, Al Obaidli AA, Ahmed Almaimani Y, Al-Arrayed S, Alhelal B, Fawzy A, Robinson BM, Pisoni RL, Aucella F, Girotti G, Gesuete A, Cicchella A, Seresin C, Vinci C, Scaparrotta G, Naso A, Pilotto A, Hoffmann TR, Flusser V, Santoro LF, Almeida FA, Aucella F, Girotti G, Gesuete A, Cicchella A, Seresin C, Vinci C, Scaparrotta G, Ganugi S, Gnerre T, Russo GE, Amato M, Naso A, Pilotto A, Trigka K, Douzdampanis P, Chouchoulis K, Mpimpi A, Kaza M, Pipili C, Kyritsis I, Fourtunas C, Ortalda V, Tomei P, Ybarek T, Lupo A, Torreggiani M, Esposito V, Catucci D, Arazzi M, Colucci M, Montagna G, Semeraro L, Efficace E, Piazza V, Picardi L, Esposito C, Hekmat R, Mohebi M, Ahmadzadehhashemi S, Park J, Hwang E, Jang M, Park S, Resende LL, Dantas MA, Martins MTS, Lopes GB, Lopes AA, Engelen W, Elseviers M, Gheuens E, Colson C, Muyshondt I, Daelemans R, He Y, Chen J, Luan S, Wan Q, Cuoghi A, Bellei E, Monari E, Bergamini S, Tomasi A, Atti M, Caiazzo M, Palladino G, Bruni F, Tekce H, Ozturk S, Aktas G, Kin Tekce B, Erdem A, Uyeturk U, Ozyasar M, Taslamacioglu Duman T, Yazici M, Schaubel DE, McCullough KP, Morgenstern H, Gallagher MP, Hasegawa T, Pisoni RL, Robinson BM, Nacak H, Van Diepen M, Suttorp MM, Hoorn EJ, Rotmans JI, Dekker FW, Speyer E, Beauger D, Gentile S, Isnard Bagnis C, Caille Y, Baudelot C, Mercier S, Jacquelinet C, Briancon S, Sosorburam T, Baterdene B, Delger A, Daelemans R, Gheuens E, Engelen W, De Boeck K, Marynissen J, Bouman K, Mann M, Exner DV, Hemmelgarn BR, Hanley D, Ahmed SB. DIALYSIS. EPIDEMIOLOGY, OUTCOME RESEARCH, HEALTH SERVICES 2. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu178] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Kurnatowska I, Grzelak P, Masajtis-Zagajewska A, Kaczmarska M, Stefa czyk L, Vermeer C, Maresz K, Nowicki M, Patel L, Bernard LM, Elder GJ, Leonardis D, Mallamaci F, Tripepi G, D'Arrigo G, Postorino M, Enia G, Caridi G, Marino F, Parlongo G, Zoccali C, Genovese F, Boor P, Papasotiriou M, Leeming DJ, Karsdal MA, Floege J, Delmas-Frenette C, Troyanov S, Awadalla P, Devuyst O, Madore F, Jensen JM, Mose FH, Kulik AEO, Bech JN, Fenton RA, Pedersen EB, Lucisano S, Villari A, Benedetto F, Pettinato G, Cernaro V, Lupica R, Trimboli D, Costantino G, Santoro D, Buemi M, Carmone C, Robben JH, Hadchouel J, Rongen G, Deinum J, Navis GJ, Wetzels JF, Deen PM, Block G, Fishbane S, Shemesh S, Sharma A, Wolf M, Chertow G, Gracia M, Arroyo D, Betriu A, Valdivielso JM, Fernandez E, Cantaluppi V, Medica D, Quercia AD, Dellepiane S, Gai M, Leonardi G, Guarena C, Migliori M, Panichi V, Biancone L, Camussi G, Covic A, Ketteler M, Rastogi A, Spinowitz B, Sprague SM, Botha J, Rakov V, Floege J, Floege J, Ketteler M, Rastogi A, Spinowitz B, Sprague SM, Botha J, Braunhofer P, Covic A, Kaku Y, Ookawara S, Miyazawa H, Ito K, Ueda Y, Hirai K, Hoshino T, Mori H, Nabata A, Yoshida I, Tabei K, El-Shahawy M, Cotton J, Kaupke J, Wooldridge TD, Weiswasser M, Smith WT, Covic A, Ketteler M, Rastogi A, Spinowitz B, Sprague SM, Botha J, Braunhofer P, Floege J, Hanowski T, Jager K, Rong S, Lesch T, Knofel F, Kielstein H, McQuarrie EP, Mark PB, Freel EM, Taylor A, Jardine AG, Wang CL, Du Y, Nan L, :Hess K, Savvaidis A, Lysaja K, Dimkovic N, Floege J, Marx N, Schlieper G, Skrunes R, Larsen KK, Svarstad E, Tondel C, Singh B, Ash SR, Lavin PT, Yang A, Rasmussen HS, Block GA, Egbuna O, Zeig S, Pergola PE, Singh B, Braun A, Yu Y, Sohn W, Padhi D, Block G, Chertow G, Fishbane S, Rodriguez M, Chen M, Shemesh S, Sharma A, Wolf M, Delgado G, Kleber ME, Grammer TB, Kraemer BK, Maerz W, Scharnagl H, Ichii M, Ishimura E, Shima H, Ohno Y, Tsuda A, Nakatani S, Ochi A, Mori K, Inaba M, Filiopoulos V, Manolios N, Hadjiyannakos D, Arvanitis D, Karatzas I, Vlassopoulos D, Floege J, Botha J, Chong E, Sprague SM, Cosmai L, Porta C, Foramitti M, Masini C, Sabbatini R, Malberti F, Elewa U, Nastou D, Fernandez B, Egido J, Ortiz A, Hara S, Tanaka K, Kushiyama A, Sakai K, Sawa N, Hoshino J, Ubara Y, Takaichi K, Bouquegneau A, Vidal-Petiot E, Vrtovsnik F, Cavalier E, Krzesinski JM, Flamant M, Delanaye P, Kilis-Pstrusinska K, Prus-Wojtowicz E, Szepietowski JC, Raj DS, Amdur R, Yamamoto J, Mori M, Sugiyama N, Inaguma D, Youssef DM, Alshal AA, Elbehidy RM, Bolignano D, Palmer S, Navaneethan S, Strippoli G, Kim YN, Park K, Gwoo S, Shin HS, Jung YS, Rim H, Rhew HY, Tekce H, Kin Tekce B, Aktas G, Schiepe F, Draz Y, Rakov V, Yilmaz MI, Siriopol D, Saglam M, Kurt YG, Unal H, Eyileten T, Gok M, Cetinkaya H, Oguz Y, Sari S, Vural A, Mititiuc I, Covic A, Kanbay M, Filiopoulos V, Manolios N, Hadjiyannakos D, Arvanitis D, Karatzas I, Vlassopoulos D, Okarska-Napierala M, Ziolkowska H, Pietrzak R, Skrzypczyk P, Jankowska K, Werner B, Roszkowska-Blaim M, Cernaro V, Trifiro G, Lorenzano G, Lucisano S, Buemi M, Santoro D, Krause R, Fuhrmann I, Degenhardt S, Daul AE, Sallee M, Dou L, Cerini C, Poitevin S, Gondouin B, Jourde-Chiche N, Brunet P, Dignat-George F, Burtey S, Massimetti C, Achilli P, Madonna MPP, Muratore MTT, Fabbri GDD, Brescia F, Feriozzi S, Unal HU, Kurt YG, Gok M, Cetinkaya H, Karaman M, Eyileten T, Vural A, Oguz Y, Y lmaz MI, Sugahara M, Sugimoto I, Aoe M, Chikamori M, Honda T, Miura R, Tsuchiya A, Hamada K, Ishizawa K, Saito K, Sakurai Y, Mise N, Gama-Axelsson T, Quiroga B, Axelsson J, Lindholm B, Qureshi AR, Carrero JJ, Pechter U, Raag M, Ots-Rosenberg M, Vande Walle J, Greenbaum LA, Bedrosian CL, Ogawa M, Kincaid JF, Loirat C, Liborio A, Leite TT, Neves FMDO, Torres De Melo CB, Leitao RDA, Cunha L, Filho R, Sheerin N, Loirat C, Greenbaum L, Furman R, Cohen D, Delmas Y, Bedrosian CL, Legendre C, Koibuchi K, Aoki T, Miyagi M, Sakai K, Aikawa A, Pozna Ski P, Sojka M, Kusztal M, Klinger M, Fakhouri F, Bedrosian CL, Ogawa M, Kincaid JF, Loirat C, Heleniak Z, Aleksandrowicz E, Wierblewska E, Kunicka K, Bieniaszewski L, Zdrojewski Z, Rutkowski B. CKD PATHOPHYSIOLOGY AND CLINICAL STUDIES. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu148] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Heisterkamp M, Titze S, Lorenzen J, Eckardt KU, Koettgen A, Kielstein JT, Bouquegneau A, Vidal-Petiot E, Vrtovsnik F, Cavalier E, Krzesinski JM, Flamant M, Delanaye P, Anguiano L, Riera M, Pascual J, Barrios C, Betriu A, Valdivielso JM, Fernandez E, Soler MJ, Denys MA, Viaene A, Goessaert AS, Delanghe J, Everaert K, Kim YS, Choi MJ, Deok JY, Kim SG, Bevc S, Hojs N, Hojs R, Ekart R, Gorenjak M, Puklavec L, Bevc S, Hojs N, Hojs R, Ekart R, Gorenjak M, Puklavec L, Piskunowicz M, Hofmann L, Zurcher E, Bassi I, Zweiacker C, Stuber M, Narkiewicz K, Vogt B, Burnier M, Pruijm M, Rusu E, Zilisteanu D, Atasie T, Circiumaru A, Carstea F, Ecobici M, Rosca M, Tanase C, Mihai S, Voiculescu M, Kim YS, Jeon YD, Choi MJ, Kim SG, Polenakovic M, Pop-Jordanova N, Hung SC, Tarng DC, Tuta L, Stanigut A, Mesiano P, Rollino C, Ferro M, Beltrame G, Massara C, Quattrocchio G, Borca M, Bazzan M, Roccatello D, Maksudova A, Urasaeva LI, Khalfina TN, Zilisteanu D, Rusu E, Atasie T, Ecobici M, Circiumaru A, Carstea F, Rosca M, Tanase C, Mihai S, Voiculescu M, Tekce H, Kin Tekce B, Aktas G, Alcelik A, Sengul E, Lindic J, Purg D, Skamen J, Krsnik M, Skoberne A, Pajek J, Kveder R, Bren A, Kovac D, Kin Tekce B, Tekce H, Aktas G, Delgado G, Drechsler C, Wanner C, Blouin K, Pilz S, Tomaschitz A, Kleber ME, Willmes C, Krane V, Marz W, Ritz E, Van Gilst WH, Van Der Harst P, De Boer RA, Scholze A, Petersen L, Hocher B, Rasmussen LM, Tepel M, De Paula EA, Vanelli CP, Caminhas MS, Soares BC, Bassoli FA, Da Costa DMN, Lanna CMM, Galil AGS, Colugnati FAB, Costa MB, Bastos MG, De Paula RB, Santoro D, Zappulla Z, Alibrandi A, Tomasello Andulajevic M, Licari M, Baldari S, Buemi M, Cernaro V, Campenni A, Pallet N, Chauvet S, Levi C, Meas-Yedid V, Beaune P, Thevet E, Karras A, Santos S, Malheiro J, Campos A, Pedroso S, Santos J, Cabrita A, Mayor MM, Ayala R, Ramos C, Franco S, Guillen R, Kim JS, Yang JW, Han BG, Choi SO, Tudor MN, Navajas Martinez MF, Vaduva C, Maria DT, Mota E, Clari R, Mongilardi E, Vigotti FN, Consiglio V, Scognamiglio S, Nazha M, Roggero S, Piga A, Piccoli G, Mukhopadhyay P, Patar K, Chaterjee N, Ganguly K. CKD LAB METHODS, PROGRESSION & RISK FACTORS 1. Nephrol Dial Transplant 2014. [DOI: 10.1093/ndt/gfu145] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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Aktas G, Özcan N, Aydin DH, Şahin E, Akça K. Effect of digitizing techniques on the fit of implant-retained crowns with different antirotational abutment features. J Prosthet Dent 2014; 111:367-72. [DOI: 10.1016/j.prosdent.2013.11.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Kanat M, Goksugur SB, Ozlu T, Tunckale A, Ozturk B, Ozturk FY, Altuntas Y, Suleymanoglu Y, Atmaca H, Yolcu N, Gonenc I, Delibasi T, Zuhur S, Dikbas O, Aktas G, Karagoz Y, Abdul-Ghani MA. The effect of feto-maternal blood type incompatibility on development of gestational diabetes mellitus. Clin Ter 2014; 165:e145-7. [PMID: 24770823 DOI: 10.7471/ct.2014.1698] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
OBJECTIVE To assess the relation between fetal and maternal blood type (ABO, Rh) incompatibility and development of gestational diabetes mellitus (GDM). MATERIALS AND METHODS A total of 500 pregnant women underwent diagnostic test for GDM by a 100-g oral glucose tolerance test (OGTT) after an 8 to 12-h overnight fast participated in this study. OGTT was performed between the 24-28 weeks of gestation, but participants who were at high risk for GDM were tested after the first prenatal visit. In the postpartum period, maternal and infant blood types were determined. Presence of GDM was evaluated in terms of matched and unmatched fetal and maternal ABO and Rh blood types separately. RESULTS GDM was detected in 235 participants. Unmatched ABO blood types between the mother-infant pairs were present in 44.7% (n=105) of GDM (+) and 35.8 % (n=95) of GDM (-) patients. Incompatible feto-maternal ABO blood type was positively correlated with development of GDM which was marginally significant. (p=0.045; R=1.2;95% CL; 1.004-1.48). However, Rh feto-maternal blood type incompatibility was not related with development of GDM. CONCLUSIONS Feto-maternal ABO blood type incompatibility may be a weak risk factor for the development of GDM.
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Affiliation(s)
- M Kanat
- Departments of Internal Medicine, Istanbul Medipol University, Istanbul
| | - S B Goksugur
- Departments of Pediatrics, Izzet Baysal Women's and Children's Hospital, Bolu
| | - T Ozlu
- Departments of Obstetrics and Gynecology, Medical School, University of Abant Izzet Baysal, Bol
| | - A Tunckale
- Departments of Internal Medicine, Cerrahpasa Medical School, University of Istanbul, Istanbul
| | - B Ozturk
- Departments of Endocrinology and Metabolism, University of Ege, Izmir
| | - F Y Ozturk
- Departments of Endocrinology and Metabolism, Sisli Etfal Training and Research Hospital, Istanbul
| | - Y Altuntas
- Departments of Endocrinology and Metabolism, Sisli Etfal Training and Research Hospital, Istanbul
| | - Y Suleymanoglu
- Departments of Internal Medicine, University of Acibadem, Istanbul
| | - H Atmaca
- Departments of Endocrinology and Metabolism, University of Ondokuz Mayıs, Samsun
| | - N Yolcu
- Departments of Endocrinology and Metabolism, Haydarpasa Training and Research Hospital, Istanbul
| | - I Gonenc
- Departments of Endocrinology and Metabolism, Haydarpasa Training and Research Hospital, Istanbul
| | - T Delibasi
- Departments of Endocrinology and Metabolism, Diskapi Yildirim Beyazit Training and Research Hospital, Ankara
| | - S Zuhur
- Departments of Endocrinology and Metabolism, Sisli Etfal Training and Research Hospital, Istanbul
| | - O Dikbas
- Departments of 1Internal Medicine, Istanbul Medipol University, Istanbul
| | - G Aktas
- Departments of 1Internal Medicine, Istanbul Medipol University, Istanbul
| | - Y Karagoz
- Faculty of Economics and Administrative Sciences, University of Abant Izzet Baysal, Bolu
| | - M A Abdul-Ghani
- Division of Diabetes, University of Texas Health Science Center at San Antonio, Texas, USA
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Aktas G, Alcelik A, Ozlu T, Tosun M, Tekce B, Savli H, Tekce H, Dikbas O. Association between Omentin Levels and Insulin Resistance in Pregnancy. Exp Clin Endocrinol Diabetes 2014; 122:163-6. [PMID: 24643693 DOI: 10.1055/s-0034-1370917] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- G. Aktas
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - A. Alcelik
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - T. Ozlu
- Department of Obstetrics and Gynecology, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - M. Tosun
- Department of Biochemistry, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - B. Tekce
- Department of Biochemistry, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - H. Savli
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - H. Tekce
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - O. Dikbas
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
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Sit M, Tosun M, Aktas G, Yilmaz EE. Effects of N-acetyl cysteine on lipid levels and on leukocyte and platelet count in rats after splenectomy. Niger J Clin Pract 2014; 17:343-5. [PMID: 24714014 DOI: 10.4103/1119-3077.130237] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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Aktas G, Sahin E, Vallittu P, Ozcan M, Lassila L. Effect of colouring green stage zirconia on the adhesion of veneering ceramics with different thermal expansion coefficients. Int J Oral Sci 2013; 5:236-41. [PMID: 24158142 PMCID: PMC3967313 DOI: 10.1038/ijos.2013.66] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2012] [Accepted: 11/19/2012] [Indexed: 11/09/2022] Open
Abstract
This study evaluated the adhesion of zirconia core ceramics with their corresponding veneering ceramics, having different thermal expansion coefficients (TECs), when zirconia ceramics were coloured at green stage. Zirconia blocks (N=240; 6 mm×7 mm×7 mm) were manufactured from two materials namely, ICE Zirconia (Group 1) and Prettau Zirconia (Group 2). In their green stage, they were randomly divided into two groups. Half of the specimens were coloured with colouring liquid (shade A2). Three different veneering ceramics with different TEC (ICE Ceramic, GC Initial Zr and IPS e.max Ceram) were fired on both coloured and non-coloured zirconia cores. Specimens of high noble alloys (Esteticor Plus) veneered with ceramic (VM 13) (n=16) acted as the control group. Core-veneer interface of the specimens were subjected to shear force in the Universal Testing Machine (0.5 mm⋅min(-1)). Neither the zirconia core material (P=0.318) nor colouring (P=0.188) significantly affected the results (three-way analysis of variance, Tukey's test). But the results were significantly affected by the veneering ceramic (P=0.000). Control group exhibited significantly higher mean bond strength values (45.7±8) MPa than all other tested groups ((27.1±4.1)-(39.7±4.7) and (27.4±5.6)-(35.9±4.7) MPa with and without colouring, respectively) (P<0.001). While in zirconia-veneer test groups, predominantly mixed type of failures were observed with the veneering ceramic covering <1/3 of the substrate surface, in the metal-ceramic group, veneering ceramic was left adhered >1/3 of the metal surface. Colouring zirconia did not impair adhesion of veneering ceramic, but veneering ceramic had a significant influence on the core-veneer adhesion. Metal-ceramic adhesion was more reliable than all zirconia-veneer ceramics tested.
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Affiliation(s)
- Guliz Aktas
- Department of Prosthodontics, Faculty of Dentistry, Hacettepe University, Ankara, Turkey
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Apuhan T, Gepdiremen S, Arslan AO, Aktas G. Evaluation of patients with nasal polyps about the possible association of desmosomal junctions, RORA and PDE4D gene. Eur Rev Med Pharmacol Sci 2013; 17:2680-2683. [PMID: 24142618] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
OBJECTIVES Nasal polyposis is chronic inflammatory disease of the nasal mucosa of the nose and sinuses, often associated with chronic non-allergic rhinitis, aspirin intolerance and non-allergic asthma. The etiology of nasal polyposis is unknown. Multiple factors contribute to the development of nasal polyps including genetic predisposition. PATIENTS AND METHODS This study was conducted on patients applied due to nasal polyps. Blood samples were collected peripheral vein and stored at 4°C until analysis for DNA extraction. Genomic DNA was extracted from peripheral blood by a standard method, samples were studied in real time PCR. All patients were evaluated about the possible association of DSG1 (rs7236477-G, 96 rxn), DSG3 (rs1941184-C, 96 rxn), PDE4D (rs1588265) and RORA (rs11071559) gene. RESULTS 32 patients (17 male, 15 female) with nasal polyposis were included to the study. The mean age was 34.9 ± 17.7 years, ranging between 18 and 55 years. Control group was consisted with 50 healthy volunteers without a history of nasal polyp. DSG1, DSG3 and RORA values of the study group were not statistically different from control group (p > 0.05). PDE4D values of the study group were significantly different from control group (p < 0.05). CONCLUSIONS Multiple factors contribute to the pathogenesis of nasal polyps including genetic predisposition. The PDE4D family has gained interest in the complex pathogenesis of nasal polyposis. This is likely linked to the mucosal inflammatory response.
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Affiliation(s)
- T Apuhan
- Department of Otorhinolaryngology, Department of Genetics and Department of Internal Medicine, Izzet Baysal Medicine Faculty of Abant Izzet Baysal University, Bolu, Turkey.
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Alcelik A, Aktas G, Eroglu M, Tosun M, Savli H, Dikbas O, Zeyrek A, Yalcin A. Platelet function in euthyroid patients undergoing thyroidectomy in women. Eur Rev Med Pharmacol Sci 2013; 17:2350-2353. [PMID: 24065229] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
BACKGROUND Several studies have reported several platelet abnormalities in patients with sub-clinical or overt thyroid dysfunctions. The primary mechanism that affects the hemostatic balance is excess or deficiency of thyroid hormones. The different ways of thyroid gland to the platelet function are not yet clearly understood. The relationship between in the thyroid gland and platelet activation without thyroid hormones has not been studied yet. AIM The aim of our study is to determine the platelet function in euthyroid patients undergoing thyroidectomy in females. PATIENTS AND METHODS The study group includes 52 female euthyroid patients undergoing thyroidectomy. The control group consisted with 21 healthy euthyroid female. Platelet count (PC), platelet mass (PM), mean platelet volume (MPV), and platelet distribution width (PDW) were measured. PM was calculated by multiplying MPV and PLT. RESULTS MPV (8.4 ± 1.3 versus 7.9 ± 0.8) and PDW (17.8 ± 1 versus 17.6 ± 0.8) values were similar between the two groups. CONCLUSIONS Thyroid gland does not directly affect platelet activation. Accordingly, platelet abnormalities of thyroid disease can be considered to be independent of the underlying thyroid tissue. This finding suggests that association between thyroid diseases and platelet function is dependent on the status of thyroid hormones.
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Affiliation(s)
- A Alcelik
- Department of Internal Medicine, Izzet Baysal Medical Faculty, Bolu, Turkey.
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Abstract
BACKGROUND Many studies in literature point out that inflammation related to nasal polyp is mostly dependent on eosinophils and their inflammatory products. Beside eosinophils, platelets may have a role in nasal polyp development. Platelets are involved in haemostasis, tissue repairing and inflammation. However, to our knowledge, there are no reports in the literature that study the association between platelet parameters and nasal polyps. SUBJECTS AND METHODS Forty-three patients with nasal polyps and forty-nine healthy controls were enrolled in the study, retrospectively. Laboratory data of patients with nasal polyp were obtained at the time of diagnosis. RESULTS There were no statistically significant differences between the two groups in terms of white blood count, haemoglobin, haematocrit and platelet count. The mean platelet volume (MPV) value of the nasal polyp group was significantly lower than the control group (p = 0.025). Mean eosinophil count was significantly elevated in the nasal polyp group compared to the control group (p < 0.001). CONCLUSIONS Reduction in MPV may be an indicator for nasal polyp formation. Further studies with a larger study population are needed to detect the possible correlation between eosinophil count and MPV values in patients with nasal polyps.
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Affiliation(s)
- G Aktas
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey.
| | - M Sit
- Department of General Surgery, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - H Tekce
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - A Alcelik
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - H Savli
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - T Simsek
- Department of Otolaryngology, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - E Ozmen
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - A Z Isci
- Department of Internal Medicine, Abant Izzet Baysal University Hospital, Bolu, Turkey
| | - T Apuhan
- Department of Otolaryngology, Abant Izzet Baysal University Hospital, Bolu, Turkey
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Gelev S, Toshev S, Trajceska L, Pavleska S, Selim G, Dzekova P, Shikole A, Gelev S, Toshev S, Trajceska L, Pavleska S, Selim G, Dzekova P, Shikole A, Ulu SM, Yilmaz F, Ahsen A, Akci A, Yuksel S, Mihaescu A, Olariu N, Avram C, Schiller O, Schiller A, Xiao DM, Niu JY, Gu Y, Drechsler C, van den Broek H, Vervloet M, Hoekstra T, Dekker F, Ketteler M, Brandenburg V, Turkvatan A, Kirkpantur A, Mandiroglu S, Afsar B, Seloglu B, Alkis M, Erkula S, GURBUZ H, Serin M, CALIK Y, Mandiroglu F, Balci M, Choi BS, Choi SR, Park HS, Hong YA, Chung BH, Kim YS, Yang CW, Kim YS, Park CW, Jung JY, Sung JY, Kim AJ, Kim HS, Lee C, Ro H, Chang JH, Lee HH, Chung W, Sezer S, Bal Z, Tutal E, Bal U, Erkmen Uyar M, Ozdemir Acar N, Karakas Y, Sahin G, Urfali F, Bal C, Akcar Degirmenci N, Sirmagul B, Janda K, Krzanowski M, Dumnicka P, Kusnierz-Cabala B, Sulowicz W, Balci M, Kirkpantur A, Mandiroglu S, Afsar B, Seloglu B, Alkis M, Serin M, CALIK Y, Erkula S, GURBUZ H, Mandiroglu F, Turkvatan A, Valtuille RA, Gonzalez MS, Casos ME, Yoshida T, Yamashita M, Hayashi M, Raikou VD, Tentolouris N, Makropoulos I, Kaisidis P, Boletis JN, Abdalla AA, Roche D, Forbes JF, Hannigan A, Hegarty A, Cronin CJ, Casserly LF, Stack AG, Guinsburg A, Raimann JG, Usvyat L, Kooman J, Marelli C, Etter M, Marcelli D, Levin NW, Kotanko P, Kim CS, Choi JS, Bae EH, Ma SK, Kim SW, Ryu JH, Lee S, Ryu DR, Kim SJ, Kang DH, Choi KB, Shoji T, Tsuchikura S, Shimomura N, Kakiya R, Tsujimoto Y, Tabata T, Emoto M, Nishizawa Y, Inaba M, Selim G, Stojceva-Taneva O, Tozija L, Georgievska-Ismail L, Gelev S, Dzekova-Vidimliski P, Trajceska L, Petronievic Z, Sikole A, Wu CJ, Pan CF, Chen HH, Lin CJ, Kim Y, Kim JK, Song YR, Kim SG, Kim HJ, Kuwahara M, Bannai K, Kikuchi K, Yamato H, Segawa H, Miyamoto KI, De Mauri A, Chiarinotti D, Ruva CE, David P, Capurro F, De Leo M, Han JH, Kim HR, Ko KI, Kim CH, Koo HM, Doh FM, Lee MJ, Oh HJ, Han SH, Yoo TH, Choi KH, Kang SW, Shibata K, Sohara H, Kuji T, Kawata S, Kogudhi N, Nishihara M, Satta H, Jung JY, Ro H, Lee C, Kim SM, Kim AJ, Kim HS, Chang JH, Lee HH, Chung W, Kramann R, Erpenbeck J, Becker M, Brandenburg V, Kruger T, Marx N, Floege J, Schlieper G, Power A, Fogarty D, Wheeler D, Kerschbaum J, Schwarz CP, Mayer G, Prajitno CW, Matsuzawa R, Matsunaga A, Ishii A, Abe Y, Yoneki K, Harada M, Takagi Y, Yoshida A, Takahira N, Sirch J, Pfeiffer S, Fischlein T, El-Nahid MS, Issac MS, Bal Z, Tutal E, Bal U, Erkmen Uyar M, Guliyev O, Sayin B, Sezer S, Bajari T, Hermann M, Gmeiner B, Regele H, Aumayr K, Gensberger ET, Scharrer S, Sengoge G, Novo A, Tania S, Anes E, Domingues A, Mendes E, Batista G, Viana J, Rroji M, Cafka M, Seferi S, Seiti J, Petrela E, Likaj E, Thereska N, Selim G, Stojceva-Taneva O, Tozija L, Georgievska-Ismail L, Gelev S, Dzekova-Vidimliski P, Trajceska L, Petronievic Z, Sikole A, Turkmen K, Ozcicek F, Erdur F, Turk S, Yeksan M, Tonbul H, Castellano S, Palomares I, Merello JI, Mandiroglu S, Torkvatan A, Balci M, Seloglu B, Alkis M, Serin M, Erkula S, Gurbuz H, Calik Y, Afsar B, Mandiroglu F, Kirkpantur A, Ulusal Okyay G, Okyay K, Polattas Solak E, Sahinaslan A, Pasaoglu O, Ayerden Ebinc F, Boztepe Derici U, Sindel S, Arinsoy T, Lee YK, Son SY, Choi MJ, Lee SM, Yoon JW, Koo JR, Noh JW, Vaziri ND, Matias P, Amaral T, Ferreira AC, Mendes M, Azevedo A, Jorge C, Aires I, Gil C, Ferreira A, Carretero Dios D, Merello Godino JI, Moran Risco JE, Castellano Gasch S, Schwermer K, Hoppe K, Klysz P, Radziszewska D, Sikorska D, Nealis J, Polcyn-Adamczak M, Zaremba-Drobnik D, Pawlaczyk K, Oko A, Mentese A, Yavuz A, Karahan C, Sumer A, Ozkan G, Ulusoy S, Yildiz G, Duman A, Aydin H, Yilmaz A, Hur E, Magden K, Cetin G, Candan F, Franczyk-Skora B, Gluba A, Kowalczyk M, Banach M, Rysz J, Novo A, Domingues A, Preto L, Sousa T, Mendes E, Batista G, Vaz J, Oue M, Kuragano T, Hamahata S, Fukao W, Toyoda K, Nakanishi T, Otsubo S, Tsuchiya K, Akiba T, Nitta K, Afsar B, Saglam M, Yuceturk C, Agca E, Tosic J, Djuric Z, Popovic J, Buzadzic I, Djuric P, Jankovic A, Dimkovic N, Simone S, Dell'Oglio MP, Ciccone M, Castellano G, Corciulo R, Balestra C, Giangrande M, Gigante M, Grandaliano G, Gesualdo L, Pertosa GP, Mohamed EA, Marouane B, Mohamed Reda EF, Aziz R, Hicham B, Youssef B, Abdennasser EK, Salaheddine T, Mohammed A, Hwang JC, Jiang MY, Lu YH, Wang CT, Grzegorzewska A, Cieszynski K, Niepolski L, Sowinska A, Abdallah E, Al-Helal B, Waked E, Abdel-Khalik A, Nabil M, El-Shanawany F, Tekce H, Kursat S, Bahadir Colak H, Aktas G, Ozcicek A, Turkmen K, Ozcicek F, Akbas E, Demirtas L, Ozbicer A, Cetinkay R, Capoglu I, Valocikova I, Valocik G, Vachalcova M, Kolesarova E, Nowak A, Friedrich B, Artunc F, Serra A, Breidthardt T, Twerenbold R, Peter M, Potocki M, Muller C. Cardiovascular complications in CKD 5D. Nephrol Dial Transplant 2013. [DOI: 10.1093/ndt/gft147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Aktas G, Basara EG, Sahin E, Uctasli S, Vallittu PK, Lassila LV. Effects of different cavity designs on fracture load of fiber-reinforced adhesive fixed dental prostheses in the anterior region. J Adhes Dent 2013; 15:131-5. [PMID: 23534008 DOI: 10.3290/j.jad.a28505] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
PURPOSE To evaluate the fracture strength of inlay-retained, surface-retained, and cantilevered fiber-reinforced adhesively fixed dental prostheses (FRA-FDPs) in the anterior region. MATERIALS AND METHODS Thirty-two sound human right central incisors and canines were divided into four groups. Test groups were as follows: group 1, both teeth had deep cavity preparation; group 2, both teeth had shallow cavity preparation; group 3, only the canine teeth had deep cavity preparation; group 4, no preparation was made on the abutment teeth. Lateral pontics were restored with FRA-FDPs. All restorations were subjected to fracture loading from the lateral pontic. The restorations were tested in a universal testing machine (LRX Material Testing Machine) with a crosshead speed of 1 mm/min. One-way ANOVA was used for statistical analyses. Fracture modes were examined visually. RESULTS The highest (667.3 ± 90.4 N) and the lowest (409.3 ± 158.1 N) debonding values were found for groups 4 and 3, respectively. CONCLUSIONS Different preparation designs (inlay-retained, surface-retained) had no significant effect on fracture strength of FRA-FDPs in the anterior region. However, a cantilever design exhibited significantly lower fracture strength. Delamination of the veneering composite was observed as the primary failure type after fracture tests.
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Affiliation(s)
- Guliz Aktas
- Department of Prosthodontics, Hacettepe University, Ankara, Turkey.
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Ersu B, Narin D, Aktas G, Yuzugullu B, Canay S. Effect of preparation taper and height on strength and retention of zirconia crowns. INT J PROSTHODONT 2012; 25:582-584. [PMID: 23101037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
This study aimed to determine the effect of the taper and height of tooth preparations on the fracture strength and retention of zirconia crowns. Sixty-four dies were designed to simulate a crown preparation. Dies were machined with a height of either 4 mm (n = 16) or 7 mm (n = 16) and a taper of either 6 degrees (n = 16) or 20 degrees (n = 16). Copings were created from Lava zirconia blanks. Retention tests were performed using a universal testing machine. Copings were recemented on the dies, thermocycled, and tested for fracture strength. Data were analyzed using factorial analysis of variance. Retention was greater in the taller and less-tapered preparation designs. Taller preparations showed superior fracture strength. Preparing posterior teeth with higher axial walls and less taper is recommended to achieve increased retention and strength for zirconia crowns.
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Affiliation(s)
- Bahadir Ersu
- Department of Prosthodontics, Hacettepe University, Ankara, Turkey
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