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- 저자 : Meral Tuna (검색결과 5 건)
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Melahat Çelik Güven,Meral Tuna,Ergun Bozdağ,Gizem Nur Öztürk,Gulsen Bayraktar 대한치과보철학회 2017 The Journal of Advanced Prosthodontics Vol.9 No.6
The article ‘Comparison of retention forces with various fabrication methods and materials in double crowns’ authored by Melahat Çelik Güven, Meral Tuna, Ergun Bozdağ, Gizem Nur Öztürk, and Gulsen Bayraktar, published in August issue [Vol 9, No 4] of The Journal of Advanced Prosthodontics (2017), has an erratum. In the above article, the financial grant has been erroneously omitted, so it would be disclosed as below. Funding: This study was supported by the Research Fund of Istanbul University. Project No. 50058. The Journal of Advanced Prosthodontics apologizes to the readers for this error.
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( Meral Mert ),( Yildiz Okuturlar ),( Ozlem Soyoyluk ),( Didem Acarer ),( Pinar Karakaya ),( Savas Tuna ),( Ozlem Harmankaya ),( A Baki Kumbasar ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Background: Adrenal neoplasms are common and are incidentally discovered in 4-10% of abdominal imaging studies. Most of them are not cancerous and nonfunctional. Every adrenal incidentaloma is evaluated with function tests for functionality. In our study we aimed to investigate the relation of tumor markers which were measured for other reasons and function tests in nonfunctional adrenal adenomas retrospectively. Methods: Patients diagnosed with nonfunctional adrenal adenoma in the last three years in our research hospital were evaluated retrospectively. Data of 133 patients including function tests (renin -aldosterone-17OHprogesterone-testosterone-dehydroepiandrosteronesulphate levels, 24 hour urinary metanephrine and normetanephrine levels, overnight dexamethasone supression test) were evaluated. Fortyfi ve of these 133 patients had tumor markers (CEA, alpha-fetoprotein, CA 19-9, CA15-3, CA125) recorded. The relation between function tests and tumor markers are examined. Results: The data of 31 women and 16 men with mean age 55,54±10,64 years and 56,06±11,41 years respectively were evaluated. There was a negative correlation between age and CA-125 levels. A negative correlation was also found between testosterone and CA15-3. There was a positive correlation between urinary cortisole and CEA and also between aldosterone and CA19-9 levels. Conclusions: Tumor markers may be used as alternative tests for function tests. But future studies with big sample size are needed to confi rm this hypothesis.
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Comparison of retention forces with various fabrication methods and materials in double crowns
Guven, Melahat Celik,Tuna, Meral,Bozdag, Ergun,Ozturk, Gizem Nur,Bayraktar, Gulsen The Korean Academy of Prosthodonitics 2017 The Journal of Advanced Prosthodontics Vol.9 No.4
PURPOSE. The purpose of this study was to analyze the retention force changes and wear behaviours of double-crown systems over long-term use. MATERIALS AND METHODS. Ten groups, each consisting of six samples, were evaluated. Specifically, casting gold alloy primary crown - casting gold alloy secondary crown (AA), laser sintering primary crown - laser sintering secondary crown (LL), casting Cr alloy primary crown - casting Cr alloy secondary crown, (CC) zirconia primary crown - electroformed secondary crown (ZA), and CAD/CAM titanium alloy primary crown - CAD/CAM titanium alloy secondary crown (TT) groups were evaluated at cone angles of $4^{\circ}$ and $6^{\circ}$. The samples were subjected to 5,000 insertion-separation cycles in artificial saliva, and the retention forces were measured every 500 cycles. The wear levels were analyzed via SEM at the beginning and end of the 5,000 cycles. RESULTS. In all samples, the retention forces increased when the conus angle decreased. The highest initial and final retention force values were found in the $LL-4^{\circ}$ group (32.89 N-32.65 N), and the lowest retention force values were found in the $ZA6^{\circ}$ group (5.41 N-6.27 N). The ZA groups' samples showed the least change in the retention force, and no wear was observed. In the other groups, wear was observed mostly in the primary crowns. CONCLUSION. More predictable, clinically relevant, and less excursive retention forces can be observed in the ZA groups. The retention force values of the LL groups were statically similar to those of the other groups, except the ZA groups.
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Utility of Peripheral Blood Parameters in Predicting Breast Cancer Risk
Okuturlar, Yildiz,Gunaldi, Meral,Tiken, Elif Eda,Oztosun, Bugra,Inan, Yesim Ozdem,Ercan, Tarik,Tuna, Savas,Kaya, Ali Osman,Harmankaya, Ozlem,Kumbasar, Abdulbaki Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.6
Purpose: We aimed to study the inflammatory parameters of complete blood count in breast cancer cases. Materials and Methods: This retrospective study covered 178 breast cancer patients and 107 age and body mass index matched healthy women. Complete blood count parameters, neutrophil/lymphocyte ratio (NLR), platelet/lymphocyte ratio (PLR) and MPV/platelet were analyzed. Results: The leukocyte, neutrophil and neutrophil/lymphocyte ratio were higher in the patient group (p values 0.001, 0.0001 and 0.0001, respectively) while haemoglobin and hematocrit were higher in the control group (p=0.0001 for both). Logistic regression analysis showed that elevated neutrophils and platelet distribution width (PDW) (OR: 0.627, 95%CI: 0.508-0.774, p=0.001 and OR: 1.191 95%CI: 1.057-1.342 p=0.003) were independent variables for predicting breast cancer. The cut-off value for the neutrophil/lymphocyte ratio was 2.56. Conclusions: According to our study results, neutrophil levels as part of complete blood count may be used as an independent predictor of breast cancer risk.
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Comparison of retention forces with various fabrication methods and materials in double crowns
Melahat Çelik Güven,Meral Tuna,Ergun Bozdağ,Gizem Nur Öztürk,Gulsen Bayraktar 대한치과보철학회 2017 The Journal of Advanced Prosthodontics Vol.9 No.4
PURPOSE. The purpose of this study was to analyze the retention force changes and wear behaviours of doublecrown systems over long-term use. MATERIALS AND METHODS. Ten groups, each consisting of six samples, were evaluated. Specifically, casting gold alloy primary crown - casting gold alloy secondary crown (AA), laser sintering primary crown - laser sintering secondary crown (LL), casting Cr alloy primary crown - casting Cr alloy secondary crown, (CC) zirconia primary crown - electroformed secondary crown (ZA), and CAD/CAM titanium alloy primary crown - CAD/CAM titanium alloy secondary crown (TT) groups were evaluated at cone angles of 4° and 6°. The samples were subjected to 5,000 insertion-separation cycles in artificial saliva, and the retention forces were measured every 500 cycles. The wear levels were analyzed via SEM at the beginning and end of the 5,000 cycles. RESULTS. In all samples, the retention forces increased when the conus angle decreased. The highest initial and final retention force values were found in the LL-4° group (32.89 N-32.65 N), and the lowest retention force values were found in the ZA6° group (5.41 N-6.27 N). The ZA groups’ samples showed the least change in the retention force, and no wear was observed. In the other groups, wear was observed mostly in the primary crowns. CONCLUSION. More predictable, clinically relevant, and less excursive retention forces can be observed in the ZA groups. The retention force values of the LL groups were statically similar to those of the other groups, except the ZA groups.
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