Does mini-implant-supported rapid maxillary expansion cause less root resorption than traditional approaches? A micro-computed tomography study

Rukiye Alcina,Siddik Malkoç, 대한치과교정학회 2021 대한치과교정학회지 Vol.51 No.4

Objective: This study aimed to evaluate the volume, amount, and localization of root resorption in the maxillary first premolars using micro-computed tomography (micro-CT) after expansion with four different rapid maxillary expansion (RME) appliances. Methods: In total, 20 patients who required RME and extraction of the maxillary first premolars were recruited for this study. The patients were divided into four groups according to the appliance used: mini-implant-supported hybrid RME appliance, hyrax RME appliance, acrylic-bonded RME appliance, and full-coverage RME appliance. The same activation protocol (one activation daily) was implemented in all groups. For each group, the left and right maxillary first premolars were scanned using micro-CT, and each root were divided into six regions. Resorption craters in the six regions were analyzed using special CTAn software for direct volumetric measurements. Data were statistically analyzed using Kruskal-Wallis one-way analysis of variance and Mann-Whitney U test with Bonferroni adjustment. Results: The hybrid expansion appliance resulted in the lowest volume of root resorption and the smallest number of craters (p < 0.001). In terms of overall root resorption, no significant difference was found among the other groups (p > 0.05). Resorption was greater on the buccal surface than on the lingual surface in all groups except the hybrid appliance group (p < 0.05). Conclusions: The findings of this study suggest that all expansion appliances cause root resorption, with resorption craters generally concentrated on the buccal surface. However, the mini-implant-supported hybrid RME appliance causes lesser root resorption than do other conventional appliances. [Korean J Orthod 2021;51(4):241-249]

Different Biopolymers' Effects on the Evaluation and Characterization of Floating Tablets Prepared by Lyophilization Technique to Improve the Quality Control Parameters

Rukiye Sevinç Özakar,Emrah Özakar 한국고분자학회 2022 폴리머 Vol.46 No.2

Conventional oral drug systems are unable to keep drug concentration within the therapeutic range, and administration of the dosage form several times a day can cause significant fluctuations in plasma drug concentration. Therefore, floating drug delivery systems are being developed. In this study, floating tablets with a model drug (ampicillin sodium-Amp.Na) were successfully prepared using different polymers by the lyophilization technique. This study aims to prepare and characterize floating lyophilized tablets to understand the effect of different biopolymers on quality control parameters more clearly. Within the scope of characterization studies, many parameters were evaluated successfully. All tablets showed 24-hour release and had a mesoporous structure, as understood from the Brunauer-Emmett-Teller (BET) analysis. It has been determined from the Fourier transform infrared (FTIR) and X-ray diffraction (XRD) analyses that Amp.Na doesn’t interact with excipients and is an amorphous form. These formulations can be used for other drugs in the future, and optimum properties can be easily characterized.

Preparation, Characterization of Chitosan-Coated/Uncoated Boron Nanoparticles and In-Vitro Evaluation of Their Antimicrobial Effects

Rukiye Sevinc Ozakar,Mehmet Semih Bingol,Mehmet Cemal Adıguzel,Emrah Ozakar 한국고분자학회 2022 폴리머 Vol.46 No.6

Many studies have reported that the widespread use and abuse of antibiotics have led to the emergence of multidrug-resistant bacteria, a significant weakness of current antibiotic therapy. Therefore, the present scenario motivates scientists to develop biocompatible nanoparticles (Nps) that apply better antibacterial effects and biocompatible properties, including cost-effectiveness. The aim of this study was to evaluate the antibacterial effect of boron nitride (BN) and chitosan coated BN-Nps using different surfactants. In this regard, the potential antibacterial activity of prepared chitosan-coated and non-coated BN-Nps have been investigated against nine reference bacteria strains. BN-Nps and chitosan-coated BN-Nps were successfully developed and characterized. Nps determined that showed high zeta potential values (between -20.1 mV and +59.2 mV). Antimicrobial resistance results indicated that formulations of BN-Nps with negative zeta potential were found to be effective compared to chitosan-coated BN-Nps with high positive zeta potential. These findings emphasize the future availability of BN-Nps formulation providing antibacterial activity.

Characteristics of Children with Acute Carbon Monoxide Poisoning in Ankara: A Single Centre Experience

Rukiye Unsal Sac,Medine Ayşin Taşar,Yurda Şimşek,İlknur Bostancı,Yıldız Bilge Dallar 대한의학회 2015 Journal of Korean medical science Vol.30 No.12

The purpose of the study was to define characteristics of children with acute carbon monoxide poisoning. Eighty children hospitalized with acute carbon monoxide poisoning were recruited prospectively over a period of 12 months. Sociodemographic features, complaints and laboratory data were recorded. When the patient was discharged, necessary preventive measures to be taken were explained to parents. One month later, the parents were questioned during a control examination regarding the precautions that they took. The ages of the cases were between one month and 16 yr. Education levels were low in 86.2% of mothers and 52.6% of fathers. All families had low income and 48.8% did not have formal housing. The source of the acute carbon monoxide poisoning was stoves in 71.2% of cases and hot-water heaters in 28.8% of cases. Three or more people were poisoned at home in 85.1% of the cases. The most frequent symptoms of poisoning were headache and vertigo (58.8%). Median carboxyhemoglobin levels at admission to the hospital and discharge were measured as 19.5% and 1.1% (P < 0.001). When families were called for re-evaluation, it was determined that most of them had taken the necessary precautions after the poisoning incident (86.3%). This study determined that children with acute childhood carbon monoxide poisoning are usually from families with low socioeconomic and education levels. Education about prevention should be provided to all people who are at risk of carbon monoxide poisoning before a poisoning incident occurs.

Back Massage to Decrease State Anxiety, Cortisol Level, Blood Prsessure, Heart Rate and Increase Sleep Quality in Family Caregivers of Patients with Cancer: A Randomised Controlled Trial

Pinar, Rukiye,Afsar, Fisun Asian Pacific Journal of Cancer Prevention 2015 Asian Pacific journal of cancer prevention Vol.16 No.18

Background: The objective of this study was to evaluate the effect of back massage on the anxiety state, cortisol level, systolic/diastolic blood pressure, pulse rate, and sleep quality in family caregivers of patients with cancer. Materials and Methods: Forty-four family caregivers were randomly assigned to either the experimental or control group (22 interventions, 22 controls) after they were matched on age and gender. The intervention consisted of back massage for 15 minutes per day for a week. Main research outcomes were measured at baseline (day I) and follow-up (day 7). Unpaired t-test, paired t test and chi-square test were used to analyse data. Results: The majority of the caregivers were women, married, secondary school educated and housewife. State anxiety (p<0.001), cortisol level (p<0.05), systolic/diastolic blood pressure (p<0.001, p<0.01 respectively), and pulse rate (p<0.01) were significantly decreased, and sleep quality (p<0.001) increased after back massage intervention. Conclusions: The study results show that family caregivers for patients with cancer can benefit from back massage to improve state anxiety, cortisol level, blood pressure and heart rate, and sleep quality. Oncology nurses can take advantage of back massage, which is non-pharmacologic and easily implemented method, as an independent nursing action to support caregivers for patients with cancer.

Phenomenological and Microscopic Analysis of Elastic Scattering Reactions: 9Be+27Al New Results

Yusuf Sert,Rukiye Ye˘gin 한국물리학회 2015 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.66 No.5

In this study, elastic scattering of the 9Be+27Al system has been re-analyzed by using phenomenologicalmodel (WS) and microscopic double-folding model (DF) potentials within the frameworkof the optical model at different incident energies. In the phenomenological and double-foldingcalculations, we have used the new parameters to explain the 9Be+27Al reaction. The real potentialsin the double-folding calculations have been obtained by using the density distribution of the9Be projectile and the 27Al target. The imaginary potentials have been taken as the Woods-Saxonvolume. The imaginary radius rw and the imaginary diffusion parameter aw have been fixed to 1.1fm and 1.85 fm, respectively. We compare the phenomenological model results with the doublefoldingmodel ones as well as the experimental data. These comparisons provide information aboutthe similarities and the differences in the models used in the calculations. The cross sections, thevolume integrals and the χ2/N values have been obtained for seven energies. Additionally we haveshown a threshold anomaly for the 9Be+27Al system in the both calculations.

Psychometric Evaluation of a Turkish Version of the Diabetes Fear of Self-injecting and Self-testing Questionnaire (D-FISQ)

Selda Celik,Rukiye Pinar 한국간호과학회 2016 Asian Nursing Research Vol.10 No.3

Purpose: To examine the psychometric properties of a Turkish version of the Diabetes Fear of Injecting and Self-testing Questionnaire (D-FISQ). Methods: Forward-backward translation of the D-FISQ from English into Turkish was conducted. Original English and translated forms were examined by a panel group. Validity was investigated using content, confirmatory factor analysis, and divergent validity. Reliability was assessed using Cronbach a values, item-total correlations, and intraclass correlations. The sample comprised 350 patients with diabetes. Data were analyzed using SPSS 15.0 for Windows and LISREL 8. Results: The content validity index for the panel members was .90, which indicated perfect content validity; items in D-FISQ were clear, concise, readable, and distinct. Confirmatory factor analysis confirmed the original construct of the D-FISQ. All items had factor loadings higher than the recommended level of .40. The D-FISQ scores were discriminated by the level of anxiety. Reliability results were also satisfactory. Cronbach a values were within ideal limits. Item-total correlation coefficient ranged from .72 to .86. In terms of test-retest reliability, intraclass correlation coefficient was found to be over .90. Conclusions: D-FISQ is a valid and reliable questionnaire in assessing needle-prick fear among Turkish patients with diabetes. We recommend performing the Turkish D-FISQ in determining and screening patients with diabetes who have fear related to self-insulin injection and finger-prick test. Thus, health care professionals should be aware of the potential consequences of injection fear such as insulin misuse and poor self-monitoring of blood glucose, which may have unfavorable effects on optimal diabetes management.

The effect of acrylamide incorporation on the thermal and physical properties of denture resins

Elif Aydogan Ayaz,Rukiye Durkan,Bora Bagi 대한치과보철학회 2013 The Journal of Advanced Prosthodontics Vol.5 No.2

PURPOSE Polymethyl methacrylate (PMMA) is the most commonly used denture base material despite typically low in strength. The purpose of this study was to improve the physical properties of the PMMA based denture base resins (QC-20, Dentsply Ltd., Addlestone, UK; Stellon, AD International Ltd, Dentsply, Switzerland; Acron MC; GC Lab Technologies Inc., Alsip, Japan) by copolymerization mechanism. MATERIALS AND METHODS Control group specimens were prepared according to the manufacturer recommendations. In the copolymer groups; resins were prepared with 5%, 10%, 15% and 20% acrylamide (AAm) (Merck, Hohenbrunn, Germany) content according to the moleculer weight ratio, respectively. Chemical structure was characterized by a Bruker Vertex-70 Fourier transform infrared spectroscopy (FTIR) (Bruker Optics Inc., Ettlingen, Germany). Hardness was determined using an universal hardness tester (Struers Duramin, Struers A/S, Ballerup, Denmark) equipped with a Vickers diamond penetrator. The glass transition temperature (Tg) of control and copolymers were evaluated by Perkin Elmer Diamond DSC (Perkin Elmer, Massachusetts,USA). Statistical analyses were carried out using the statistical package SPSS for Windows, version 15.0 (SPSS, Chicago, IL, USA). The results were tested regarding the normality of distribution with the Shapiro Wilk test. Data were analyzed using ANOVA with post-hoc Tukey test (P<.01). RESULTS The copolymer synthesis was confirmed by FTIR spectroscopy. Glass transition temperature of the copolymer groups were higher than the control groups of the resins. The 10%, 15% and 20% copolymer groups of Stellon presented significantly higher than the control group in terms of hardness. 15% and 20% copolymer groups of Acron MC showed significantly higher hardness values when compared to the control group of the resin. Acrylamide addition did not affect the hardness of the QC-20 resin significantly. CONCLUSION Within the limitation of this study, it can be concluded that copolymerization of PMMA with AAm increased the hardness value and glass transition temperature of PMMA denture base resins.

Reliability and Validity of Turkish Version of the Caregiver Quality of Life Index Cancer Scale

Yakar, Hatice Karabuga,Pinar, Rukiye Asian Pacific Journal of Cancer Prevention 2013 Asian Pacific journal of cancer prevention Vol.14 No.7

Background: Measuring effects of cancer on family caregivers is important to develop methods which can improve their quality of life (QOL). Nevertheless, up to now, only a few tools have been developed to be used in this group. Among those, the Caregiver Quality of Life Index-Cancer Scale (CQOLC) has met minimum psychometric criteria in different populations in spite of conflicting results. The present study was conducted to evaluate reliability and validity of CQOLC among Turkish cancer family caregivers. Materials and Methods: The CQOLC was administered to 120 caregivers, along with Beck Depression Inventory (BDI), Medical Outcomes Study MOS 36- Item Short Form Health Survey (SF-36), State-Trait Anxiety Inventory (STAI), and Multidimensional Scale of Perceived Social Support (MSPSS). Internal consistency and test-retest stability were used to investigate reliability. Construct validity was examined by using known group method, convergent, and divergent validity. For the known group method, we hypothesized that CQOLC scores would differ between depressed and non-depressed subjects. We investigated convergent validity by correlating scores for CQOLC with scores for other similar measures including SF-36 and STAI. The MSPSS was completed at the same time as CQOLC to provide divergent validity. Results: The values for internal consistency and test-retest correlation were 0.88 and 0.96, respectively. The CQOLC discriminated those who were depressed from those who were not. Convergent validity supported strong correlations between CQOLC scores and two main component scores (PCS, MCS) in SF-36 although there was a weak correlation between CQOLC and STAI scores. Regarding divergent validity, the correlation between CQOLC and MSPSS was in the low range, as expected. Conclusions: The Turkish CQOLC is a reliable and valid tool and it can be utilized to determine QOL of family caregivers.

Comparison of the effect of different metal alloys on the esthetic appearance of dentin porcelain

Gonca Deste Gökay,Rukiye Durkan,Perihan Oyar,Gülsüm Gökçimen 한양대학교 세라믹연구소 2022 Journal of Ceramic Processing Research Vol.23 No.1

The purpose of this study was to examine the effect of aurofilm masking agents applied to various metal alloys on the colorof porcelain in metal-ceramic restorations (MCRs). The study was conducted with 2 different base-metal alloys (Ni-Cr, Co-Cr)and 2 different noble alloys (Pd-based, Au-Pd) used for MCRs, as well as 1 high noble alloy (Au-based) that served as a controlgroup. Eight experimental groups (n=7) and 1 control group were used in this study. An aurofilm masking agent was appliedto 4 groups (AuPdM, PdM, CoCr, NiCrM). Opaque porcelain and dentin body porcelain were applied to all groups. CIEL*a*b* color coordinates were measured. The Pd group had the highest mean a* value (-5.82); however, in comparisonto the control group, the differences in a* values were statistically significant only for the Cr-Co alloy groups (CoCr andCoCrM). The Pd group had the highest mean b* value (7.89). The ΔE value (2.13) of the CoCr group was significantly higherthan all other alloy groups. Metal alloy substrate and aurofilm masking agents significantly affected the color of porcelainMCRs. However, color differences between base-metal and noble alloys and the control group were within clinically acceptablelimits (ΔE<3.5).