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    Analysis of glenohumeral morphological factors for anterior shoulder instability and rotator cuff tear by magnetic resonance imaging
    (SAGE Publications Ltd, 2018) Saygi, B.; Karahan, N.; Karakus, O.; Demir, A.I.; Ozkan, O.C.; Soylu-Boy, F.N.
    Objective: The aim of this study was to investigate whether there are glenohumeral morphological differences between normal population, glenohumeral instability, and rotator cuff pathology. Method: In this study, shoulder magnetic resonance (MR) images of 150 patients were evaluated. Patients included in the study were studied in three groups of 50 individuals: patients with anterior shoulder instability in group 1, patients with rotator cuff tear in group 2, and control subjects without shoulder pathology in group 3. Results: There were statistically significant differences between groups in evaluations for glenoid version, glenoid coronal height, glenoid coronal diameter, humeral axial and coronal diameters, and coracohumeral interval distances. Significant differences were observed between groups 2 and 3 in glenoid axial diameter, glenoid coronal height, glenoid depth, humeral coronal diameter, and coracohumeral distances. Conclusion: The results obtained in this study suggest that glenoid version, glenoid coronal height and diameter, humeral diameter, and coracohumeral interval parameters in glenohumeral morphology-related parameters in patients with anterior instability are different from those of normal population and patients with rotator cuff pathology. In cases where there is a clinically difficult diagnosis, these radiological measurements will be helpful to clinicians in diagnosis and treatment planning, especially in cases of treatment-resistant cases. © The Author(s) 2018.
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    Effects of reinforcing materials on durability of bone cement: In vitro experimental study
    (BioMed Central Ltd., 2018) Karakus, O.; Karaman, O.; Gurer, B.; Saygi, B.
    Background: Bone cement is one of the most commonly used products in orthopedic surgery. Among common indications for its use are total joint replacement, bone and joint reconstructions, fracture fixation, treatment of bone infections, and treatment of osteoporotic vertebral fractures. Endurance is still questionable. The aim of our study is to find out the effect of structure strengtheners on compression pressure measurements of bone cement. Methods: There were four groups in this study: group 1, 40 cm3 pure bone cement (PMMA); group 2, 40 cm3 bone cement with %25 titanium dust; group 3, 40 cm3 bone cement with %25 steel dust; and group 4, 40 cm3 bone cement with %25 silica fume mixtures were prepared. These mixtures were frozen in 6-mm-width, 12-mm-height molds in cylindrical shape. Axial compression was made to these molds. Results: Compression pressure measurements of the pure cement group ranged between 79.2 and 81.1 MPa; average was 80.25 ± 0.42 MPa. Measurements of titanium-added group ranged from 79.5 to 81.2 MPa; average was 80.46 ± 0.68 MPa. Steel-added group ranged from 79 to 82.2 MPa; average was 80.73 ± 0.57 MPa. For silica fume, measurements ranged from 89.1 to 91.4 MPa and average was 90.41 ± 0.57 MPa. The highest compression pressure values were gathered from the silica fume (p = 0.001). Conclusion: The construction reinforcer silica fume could be mixed with PMMA homogeneously and was superior to the other biocompatible materials that we had used in compression pressure tests. Beyond dispute, silica fume is a reinforcer which also increases the strength of the bone cement. © 2018 The Author(s).
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    Reduced transition probabilities along the yrast line in 166W
    (Amer Physical Soc, 2017) Saygi, B.; Joss, D. T.; Page, R. D.; Grahn, T.; Simpson, J.; O'Donnell, D.; Alharshan, G.
    Lifetimes of excited states in the yrast band of the neutron-deficient nuclide W-166 have been measured utilizing the DPUNS plunger device at the target position of the JUROGAM II gamma-ray spectrometer in conjunction with the RITU gas-filled separator and the GREAT focal-plane spectrometer. Excited states in W-166 were populated in the Mo-92(Kr-78, 4p) reaction at a bombarding energy of 380 MeV. The measurements reveal a low value for the ratio of reduced transitions probabilities for the lowest-lying transitions B(E2; 4(+)-> 2(+)) / B(E2; 2(+)-> 0(+)) = 0.33(5), compared with the expected ratio for an axially deformed rotor (B-4/2 = 1.43).
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    The relationship between the type of unstable intertrochanteric femur fracture and mobility in the elderly
    (BioMed Central Ltd., 2018) Karakus, O.; Ozdemir, G.; Karaca, S.; Cetin, M.; Saygi, B.
    Background: The purpose of this study was to assess the impact of uniform anti-rotational proximal femoral intramedullary nail (APFN) use on patient mobility status with the treatment of two different unstable intertrochanteric femur fracture groups of geriatric patients. Methods: The study included patients aged > 65 years who underwent surgery with APFN. Group 1 comprised AO classification, AO/OTA 31-A22, and A23 patients, and group 2, A31 and A32 patients. The demographic data of the patients, postoperative complications, follow-up, mortality status, postoperative reduction, tip-apex distance (TAD), and the Parker-Palmer mobility (PPM) score were evaluated. Results: There were no statistically significant differences between the groups in terms of gender, affected side, time from trauma to surgery, ASA score, anesthesia type, duration of hospitalization, duration of surgery, TAD values, reduction values, or mortality rate. The average age of patients in group 2 was significantly higher than that of patients in group 1 (p < 0.05). The mobility scores of group 1 patients were significantly higher than those of group 2 (p < 0.05). Conclusions: While no relationship was found between the TAD values and the reduction status of the cases, the PPM scores of the AO 31 A3 cases were determined to be significantly worse. Therefore, fractures with a preoperative classification of AO type 31 A3 can be expected to have worse results than A2 ITF fractures. The fracture type seems to have as great an effect as other factors on the postoperative mobility score. © 2018 The Author(s).