New design for an adjustable cise space maintainer

Özkalaycı, Nurhat | Yetmez, Mehmet

Article | 2018 | BioMed Research International2018

Objective. The aim of this study is to present a new adjustable Cise space maintainer for preventive orthodontic applications. Methods. Stainless steel based new design consists of six main components. In order to understand the major displacement and stress fields, structural analysis for the design is considered by using finite element method. Results. Similar to major displacement at y-axis, critical stresses ?x and ?xy possess a linear distribution with constant increasing. Additionally, strain energy density (SED) plays an important role to determine critical biting load capacity. Conclusion. Structural analysis shows that the . . .space maintainer is stable and is used for maintaining and/or regaining the space which arouses early loss of molar tooth. © 2018 Nurhat Ozkalayci and Mehmet Yetmez Daha fazlası Daha az

When do skeletal class III patients wear their reverse pull headgears?

Özkalaycı, Nurhat | Çiçek, Orhan

Article | 2017 | BioMed Research International2017

Objective. The aim of this study is to evaluate the factors that affect wearing time and patient behavior during reverse pull headgear therapy with a newly designed reverse pull headgear. Methods. In clinical practice, new reverse pull headgears were applied to fifteen patients. The patients were monitored during reverse pull headgear therapy and the data were evaluated. Statistical analysis was made. Results. During the study, patients were monitored successfully and the evaluations showed that patients wear the new reverse pull headgears mostly at night. There are differences between days of week and hours of day. Weekends are mor . . .e popular than weekdays for wearing reverse pull headgear. Conclusions. This new type of reverse pull headgears can be used successfully in clinical practice and can help the clinician. Study showed that the most important factor that affects the cooperation of reverse pull headgear patient is aesthetic appearance. © 2017 Nurhat Ozkalayci and Orhan Cicek Daha fazlası Daha az

The Effect of C-Arm Mobility and Field of Vision on Radiation Exposure in the Treatment of Proximal Femoral Fractures: A Randomized Clinical Trial

Kalem M. | Başarir K. | Kocaoglu H. | Şahin E. | Kinik H.

Article | 2018 | BioMed Research International2018

Objectives. To examine the effect of fluoroscopy devices with different sizes of image intensifier and C-arm maneuverability on operating time, fluoroscopy time, radiation dose and reduction, and fixation quality at intertrochanteric femoral fractures. Design. Single-center, randomized, prospective study. Setting. Academic Level I trauma hospital. Patients and Intervention. 34 patients treated with cephalomedullary nailing for a stable, intertrochanteric proximal femur fracture (OTA A1). Main Outcome Measurement. The total working time of the fluoroscopy device, the dose-area product (DAP), operating time, reduction quality (cortica . . .l continuity, symmetrical collodiaphyseal angle, and shortness), and fixation quality (Bosworth quadrants, the tip-apex distance, TAD). Results. There were no cases of poor reduction; also the placement of the blade was optimal for 14 patients and suboptimal in 3 patients in each group. Superior-posterior placement of the blade or TAD > 25 mm was not seen in any patient. Total operating time was significantly shorter when using device A compared to the use of device B (20.1±3.4 mins versus 25.3±5.4 mins, p<0.001). Total radiation time was significantly shorter with device A compared to the use of device B (58.1±19.4 secs versus 98.9±55.4 secs, p=0.008). The measured radiation dose was lower with the use of device A compared to device B (3.5±1.2 Gy·cm2 versus 7.3plusmn;4.5 Gy·cm2, p=0.002). Conclusion. Physical properties of fluoroscopy devices used during the fixation of intertrochanteric fractures could yield significant differences in operating times and the radiation dose while having comparable clinical results. © 2018 Mahmut Kalem et al Daha fazlası Daha az

Hypervolemia for hypertension pathophysiology: A population-based study

Hür E. | Özişik M. | Ural C. | Yildiz G. | Ma?den K. | Köse S.B. | Köktürk F.

Article | 2014 | BioMed Research International2014

Objectives. Hypertension and hypervolemia relationship was proven among renal disease, although it is not known in normal population. Present study determines the fluid distribution defects in relation to blood pressure. Material and Methods. In a population-based survey in Turkey demographics, height, weight, blood pressure, urine analysis, and serum creatinine measurements were recorded. Bioimpedance measured with the Body Composition Monitor. Results. Total 2034 population of 71.6% male, mean age 47 ± 12.6 (18-89) years, systolic blood pressure (SBP) 134.7 ± 20, diastolic blood pressure 77.9 ± 11.6mmHg. Body mass index (BMI) was . . .28.5 ± 4.5 (15.8-50.6) kg/m2; overhydration was 0.05 ± 1.05 L. There was a correlation between extracellular water (ECW)/height and SBP (r = 0.21, P < 0.001). Receiver operating characteristic (ROC) curve with the performance of 0.60 (P < 0.001) that showed cut-off value of ECW/height was 10.06 L/m, with the 69% sensitivity and 45% specificity for SBP: 140mmHg values. Risk factors for high SBP were increase of ECW/Height, age, BMI and presence of diabetes. ECW/height, SBP, and fat tissue index (FTI) increased in BMI categories (low, normal, and obese) and in diabetics. SBP and FTI were lower in smokers. Conclusions. High blood pressure may be accompanied by increased extracellular volume indices. In the future volume status assessment could be of use in evaluating the effectiveness of pharmacological intervention in the treatment of hypertension. Copyright © 2014 Ender Hür et al Daha fazlası Daha az

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