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  • Küçük Resim
    Öğe
    Comparison of the three age estimation methods: Which is more reliable for Turkish children?
    (Elsevier Ireland Ltd, 2009) Büken, Bora; Erzengin, Ömer Utku; Büken, Erhan; Şafak, Alp Alper; Yazıcı, Burhan; Erkol, Zerrin
    Background: Three atlases-the GOK, the Greulich-Pyle (GP), and the Tanner-Whitehouse (TW3)-are used frequently for age determination in Turkey, The purpose of this study was to evaluate the applicability of these three methods related to the skeletal age assessment for Turkish adolescents. Materials and methods: The conventional roentgenograms of the left hands and wrists, elbows. shoulders, and pelvises of 333 healthy Caucasian children (164 females, 169 males) who fit the study and the criteria of each atlas were obtained. The mean differences (+/- standard deviation [S.D.] in years) between the chronologic age (CA) and the skeletal age (BA), which were obtained by using each age estimation method, were calculated and tested using t-test. Results: For girls, the most accurate method was the TW3 (mean differences (d): -0.21 (p < 0.05)). following by the GP (d: 0.66 (p < 0.001), and the GOK (d: 2.99 (p < 0.001)). For boys, the most accurate method was the GP (d: 0.02 (p > 0.05)), followed by the TW3 (d: 0.18 (p < 0.05)) and GOK (d: 1.05 (p < 0.001)). Discussion and conclusions: Results show that the TW3 (for girls) and the GP (for boys) methods are more appropriate than the GOK atlas for estimating the BA. GOK could be used for boys aged 11-14 years but it should not be used for girls. (c) 2008 Elsevier Ireland Ltd. All rights reserved.
  • Küçük Resim
    Öğe
    Deneysel çalışma ile oluşturulan atış artıklarından atış mesafesinin alevsiz atomik absorpsiyon spektrofotometrisi (AAAS) kullanılarak değerlendirilmesi
    (Turkiye Klinikleri, 2013) Arpak, Baha Berk; Erkol, Zerrin; Buken, Bora; Erzengin, Ömer Utku
    Amaç: Çabçmada, ateçK silah yaralanmasi olgularmda, giriç deligi çevresindeki atiç artiklarinin miktarlan ile atiç mesafesi arasmdaki iliçkinin degerlendirilmesi amaçlandi. Gereç ve Yöntemler Traçlanmiç dana derisinden hazirlanmiç hedeflere, 9x19 mm Parabellum tabanca fi?egi ile 7,65 X 17 mm Browning tabanca fiçegi atan silahlar kuUanilarak, 0 cm, 5 cm, 15 cm, 30 cm, 45 cm, 60 cm, 80 cm ve 100 cm mesafeden beçer atiç yapildi. Her atiçtan sonra hedeflerden plaster bant yöntemi ile toplanan ömeklerde, alevsiz atomik aljzorpsiyon spektrofotometrisi (AAAS) kullanilarak, kur- §un ve antimon degerleri ölcüldü. Veriler SPSS 17.0 paket programi ile analiz edildi. Bulgular: Her iki kalibredeki fiçeklerle yapilan atiçlarda atiç mesafesi arttikça, ölcülen kurçun ve antimon miktarlarmin azaldigi tespit edildi. Mesafe arttikça kurçun miktarlannda meydana gelen degiçimin, antimon miktarlarmda meydana gelen degiçime göre daha belirgin oldugu saptandi. Her iki kalibredeki fiçeklerle yapilan atiçlarda da, ayni mesafede saptanan kurçun miktan degerlerinin antimon degerlerine kiyasla daha geniç bir aralikta oldugu behrlendi. Özellikle yakin atiç mesafesi içinde kalan atiçlarda saptanan degerlerdeki standart sapma yüksekliginin, mesafe artnkça azaldigi tespit edildi. Sonuç: Çahçmada, kurçun ve antimon degerleri için bir üstsel regresyon formülü oluçturuldu.
  • Küçük Resim
    Öğe
    Is the Tanner–Whitehouse (TW3) method sufficiently reliable for forensic age determination of Turkish children?
    (2010) Büken, Bora; Şafak, Alp Alper; Büken, Erhan; Yazıcı, Burhan; Erkol, Zerrin; Erzengin, Ömer Utku
    Aim: The purpose of our study was to determine the accuracy of Tanner-Whitehouse 3 (TW3-RUS) bone age (BA) assessments for forensic age estimations of Turkish children. Materials and methods: Plain radiographs of left hands and wrists of 324 children were evaluated. Mean chronological age (CA) was compared with mean bone age (BA) according to the TW3 atlas for each sex, and differences by age group were determined. Pearson correlation coefficients and cubic regression were used to determine the differences and model the relationships between mean BA and CA. Statistical analyses were carried out using R-project. Results: The difference between the mean CA and the mean BA was statistically significant, and there was a high correlation between them for both sexes. No P values were statistically significant for any age group for girls but P values were statistically significant at 13 and 14 years for boys. The dispersion formula was determined for each sex. Conclusion: We propose that this atlas can be used for Turkish children, until a new atlas that has been distributed and formed according to the results of multiple studies made throughout the country.