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- 저자 : Pekel (검색결과 4 건)
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Gorduysus, Melahat,Kucukkaya, Selen,Bayramgil, Nursel Pekel,Gorduysus, Mehmet Omer The Korean Academy of Conservative Dentistry 2015 Restorative Dentistry & Endodontics Vol.40 No.3
Objectives: To evaluate the effects of copolymer of acrylic acid and maleic acid (Poly[AA-co-MA]) and calcium hypochlorite ($Ca(OCl)_2$) on root canal dentin using scanning electron microscope (SEM). Materials and Methods: Twenty-four single-rooted teeth were instrumented and the apical and coronal thirds of each root were removed, leaving the 5 mm middle thirds, which were then separated into two pieces longitudinally. The specimens were randomly divided into six groups and subjected to each irrigant for 5 min as follows: G1, $Ca(OCl)_2$; G2, Poly(AA-co-MA); G3, $Ca(OCl)_2$ + Poly(AA-co-MA); G4, sodium hypochlorite (NaOCl); G5, ethylenediaminetetraacetic acid (EDTA); G6, NaOCl+EDTA. The specimens were prepared for SEM evaluation. Smear layer, debris and erosion scores were recorded by two blinded examiners. One image from G3 was analyzed with energy dispersive spectroscopy (EDS) on suspicion of precipitate formation. Data were analyzed using the Kruskal-Wallis and Dunn tests. Results: G1 and G4 showed the presence of debris and smear layer and they were statistically different from G2, G3, G5 and G6 where debris and smear layer were totally removed (p < 0.05). In G1 and G4, erosion evaluation could not be done because of debris and smear layer. G2, G3 and G5 showed no erosion, and there was no significant difference between them. G6 showed severe erosion and was statistically different from G2, G3 and G5 (p < 0.05). EDS microanalysis showed the presence of Na, P, and Ca elements on the surface. Conclusions: Poly(AA-co-MA) is effective in removing the smear layer and debris without causing erosion either alone or with $Ca(OCl)_2$.
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Melahat Görduysus,Selen Küçükkaya,Nursel Pekel Bayramgil,Mehmet Ömer Görduysus 대한치과보존학회 2015 Restorative Dentistry & Endodontics Vol.40 No.3
Objectives: To evaluate the effects of copolymer of acrylic acid and maleic acid (Poly[AA-co-MA]) and calcium hypochlorite (Ca(OCl)2) on root canal dentin using scanning electron microscope (SEM). Materials and Methods: Twenty-four singlerooted teeth were instrumented and the apical and coronal thirds of each root were removed, leaving the 5 mm middle thirds, which were then separated into two pieces longitudinally. The specimens were randomly divided into six groups and subjected to each irrigant for 5 min as follows: G1, Ca(OCl)2; G2, Poly(AA-co-MA); G3, Ca(OCl)2 + Poly(AA-co-MA); G4, sodium hypochlorite (NaOCl); G5, ethylenediaminetetraacetic acid (EDTA); G6, NaOCl+EDTA. The specimens were prepared for SEM evaluation. Smear layer, debris and erosion scores were recorded by two blinded examiners. One image from G3 was analyzed with energy dispersive spectroscopy (EDS) on suspicion of precipitate formation. Data were analyzed using the Kruskal-Wallis and Dunn tests. Results: G1 and G4 showed the presence of debris and smear layer and they were statistically different from G2, G3, G5 and G6 where debris and smear layer were totally removed (p < 0.05). In G1 and G4, erosion evaluation could not be done because of debris and smear layer. G2, G3 and G5 showed no erosion, and there was no significant difference between them. G6 showed severe erosion and was statistically different from G2, G3 and G5 (p < 0.05). EDS microanalysis showed the presence of Na, P, and Ca elements on the surface. Conclusions: Poly(AA-co-MA) is effective in removing the smear layer and debris without causing erosion either alone or with Ca(OCl)2.
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Soner Yılmaz,İbrahim Eker,Elif Elçi,Aysel Pekel,Rıza Aytaç Çetinkaya,Aytekin Ünlü,Cengizhan Açıkel,İsmail Yaşar Avcı 대한혈액학회 2019 Blood Research Vol.54 No.4
BackgroundSmoking, alcohol use, performing regular physical exercise, dietary habits, and anxiety level may cause platelet activation. We aimed to evaluate the anxiety levels, smoking sta-tus, alcohol intake, and sportive habits of donors, and determine their impact on the qual-ity of apheresis-platelets.MethodsState and Transient Anxiety Inventory (STAI) was used to determine the level of donors’anxiety. STAI has two subscales: S-anxiety scale (STAI-I) and T-anxiety scale (STAI-II), each comprising 20 questions rated on a 4-point Likert scale. Data on smoking, alcohol con-sumption, and performing regular physical exercise were obtained from a questionnaire filled out before donation. Flow cytometric analysis was used to quantify activated platelets.ResultsThe STAI-I level of 86 participants was normal, while that of 12 was higher. No significant difference was found in the active platelet absolute count [1.8×1011 (2.7) and 1.4×1011 (1.3), respectively; P=0.665] between donors with normal STAI-I levels and those with higher STAI-I levels. Of 98 donors, 42 had normal STAI-II levels, while 56 had higher STAI-II levels. No significant difference was found in the active platelet absolute count [2.3×1011 (3.1) and 1.5×1011 (2.3), respectively; P=0.224] between donors with normal STAI-II levels and those with higher STAI-II levels. Platelet counts of individuals who perform regular physical exercise were significantly higher than those of individuals who did not perform regular physical exercise (6.3±1.4×1011 vs. 5.5±1.4×1011).ConclusionThe quality of apheresis platelets is not affected by anxiety levels and lifestyle character-istics of blood donors. There is no need to organize apheresis blood donor pool consider-ing with these subjects.
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Imamoglu, Serhat,Celik, Nimet Burcu,Sevim, Mehmet S.,Pekel, Gokhan,Ercalik, Nimet Yesim,Turkseven Kumral, Esra,Bardak, Handan Wolters Kluwer Health, Inc. All rights reserved. 2017 Journal of glaucoma Vol.26 No.6
PURPOSE:: To investigate the relationship between the Bruch membrane opening-minimum rim width (BMO-MRW) (global and temporal) parameters with spectral-domain optical coherence tomography (SD-OCT) and visual field (VF) sensitivity on the 10-2 test in patients with advanced glaucoma. MATERIALS AND METHODS:: This cross-sectional, observational study included a total of 33 eyes of 29 patients. To evaluate VF sensitivity, automated white-on-white perimetry was performed using a Humphrey field analyzer. The mean deviation (MD) and pattern SD values were used to characterize the degree of functional damage. BMO-MRW and peripapillary retinal nerve fiber layer thickness were obtained with SD-OCT. According to the Garway-Heath map and fovea and BMO axis, the 90 degrees temporal sector of the optic disc corresponding to the central VF was divided into upper and lower parts. RESULTS:: The upper and lower temporal BMO-MRW parameters showed stronger correlations with the MD parameters of their corresponding VFs when compared with both global and temporal MRW parameters. Global and temporal retinal nerve fiber layer thickness parameters were also correlated with global MD parameters. CONCLUSIONS:: BMO-MRW measurements in the upper and lower parts of the 90 degrees temporal sector of the optic nerve head by SD-OCT and their corresponding VF sensitivity on the 10-2 test were found highly correlated. These BMO-MRW measurements could offer a means of predicting the status of visual hemifields in patients who are unable to undergo VF testing. Further longitudinal studies with larger series evaluating BMO-MRW parameters with SD-OCT are also needed to monitor progression in advanced glaucoma.
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