Aim: The vitamin D deficiency is a pandemic health problem due to worldwide modernization. We tried to determine the impact of the reduced sun exposure on the vitamin D levels of the medical faculty students due to the long study hours and indoor study environment and classrooms. Material and Method: Two-hundred and eleven (113 women, 98 men) medical faculty students were included in the study. Blood samples were obtained from the students and serum 25 hydroxyvitamin D3 levels were measured on the same day. Students were healthy individuals, aged 17-29 years (mean age= 19 years). Data were analyzed using SPSS software program. The frequency distribution of the qualitative data and arithmetic mean, minimum, maximum and standard deviation of the quantitative data were used to define descriptive statistics. Non-parametric tests and Chi-square test were used for the analysis of qualitative data; the analysis of the quantitative data was done by observing normally distributed data. The significance level of Chi-square test, independent-student t-test and Mann-Whitney U test were accepted as p≤0.05. Results: Serum 25 hydroxyvitamin D3 levels was below 20 ng/ml in 56% (n=118) of the students, of which 72% (n=85) were women. Conclusion: Especially, women had high levels of vitamin D deficiency in our study. This high ratio gives rise to thought that women spend more of their time indoor spaces due to modernization., women are exposed to sun light less than men, and thus they have higher levels of vitamin D deficiency.

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Aim: Curettage and bone grafting are common methods in the treatment of tumor-like cysts in the bone. In this study, we present our treatment results of curettage and bone grafting in patients with tumor-like bone cysts. Material and Methods: Ninety-three patients (57 males, 36 females, mean age: 33 years; range: 3 to 67 years) who were diagnosed with the tumor-like bone cysts in our clinic between march 2009 and December 2016, were evaluated. Curettage and bone grafting treatment were applied to all patients. The efficacy of the treatments was evaluated according to the Neer/Cole classification, and recurrence rates were recorded. Results: Of the treated 93 patients, 35 had a non-ossifying fibroma (NOF), 22 had an aneurysmal bone cyst(ABC), 21 had a unicameral bone cyst(UBC), and 15 had fibrous dysplasia(FD). Thirty-nine of these cysts were located in the femur,23 in the tibia, 22 in the humerus, six in the fibula, and three in the radius. Recurrence rates were observed as 14.3% (n=3) in UBCs, 13.6% (n=3) in ABCs, and 2.9% (n=1) in NOFs.In the tumor-like bone cysts, post-treatment complications were as follows: infection in five patients (5.3%), wound site problems in 11 patients (11.8%), deformity, fracture, coxa vara, limitation of the range of motion, and lower extremity shortness in nine patients (9.6%). Conclusion: These study results show that curettage and bone grafting for the patients who are admitted to the hospital with tumorlike lesions are effective and useful treatment modalities in the orthopedic oncology.