ÜÇÜNCÜ MOLARLARIN MİNERALİZASYON VE ERÜPSİYON AŞAMALARININ 18 YAŞ SINIRI TAHMİN DOĞRULUĞU

Yıl 2021, Cilt: 31 Sayı: 2, 160 - 166, 15.04.2021

Hümeyra Özge Yılancı Nursel Akkaya

https://doi.org/10.17567/ataunidfd.900944

Öz

Amaç: Hukuki ve cezai sorumluluğun belirlenmesinde yasal yaş sınırları önemlidir. Çocukların yetişkinlerden ayırt edilmesinde bireylerin 18 yaşını doldurmuş olup olmadığı dikkate alınır. Bu çalışmanın amacı, üçüncü molarların mineralizasyon ve erüpsiyon aşamalarının 18 yaşı ayırt etmede doğruluğunun test edilmesi ve her ikisinin birlikte kullanılmasının 18 yaş tahmin performansına etkisinin incelenmesidir.
Gereç ve Yöntem: Çalışmaya 13-24 yaş aralığında 449 hastanın panoramik radyogramı dahil edildi. Maksiller ve mandibular üçüncü molarların mineralizasyon aşamaları Demirjian yöntemine göre A-H arasında, erüpsiyon aşamaları Olze yöntemine göre A-D arasında derecelendirildi. Her iki yöntem için 18 yaşı gösteren eşik aşamalar belirlendi. Belirlenen eşik aşamaların tek başına ve birlikte kullanımının 18 yaş tahmin performansları ROC (Receiver Operating Characteristic) analizi ile değerlendirildi.
Bulgular: Üçüncü molarların mineralizasyon ve erüpsiyon aşamalarında sağ ile sol taraf arasında anlamlı farklılık bulunmazken, maksiller molarların mandibular molarlara göre mineralizasyonda ileri aşamada olduğu ve erüpsiyonda geciktiği saptandı. Mineralizasyon ve erüpsiyon yöntemine göre eşik aşamalar sırasıyla maksiller molarlarda H ve B, mandibular molarlarda G ve C olarak belirlendi. Tüm üçüncü molarların erüpsiyon aşamaları 18 yaşın ayırt edilmesinde %87 doğruluk sağlarken, mineralizasyon aşamaları %89-92 arasında değişen düzeylerde doğruluk gösterdi. Her iki yöntem birlikte kullanıldığında ise doğruluğun %87-89 arasında değiştiği gözlendi.
Sonuç: Mineralizasyon ve erüpsiyon yöntemleri, 18 yaş tahmininde yüksek ve orta düzey doğrulukta sonuç veren ilave metotlar olarak adli uygulamalarda yararlı olabilir. Bununla birlikte üçüncü molarların erüpsiyon aşamalarının, mineralizasyon aşamaları ile yapılan 18 yaş sınırı tahmin performansına anlamlı bir katkısı bulunmamıştır.
Anahtar kelimeler: Dişlerden yaş tespiti; Diş kalsifikasyonu; Panoramik radyografi; Çocuk; Erişkin.

ACCURACY OF THE MINERALIZATION AND ERUPTION STAGES IN THIRD MOLARS TO ESTIMATE THE 18-YEAR THRESHOLD
ABSTRACT
Aim: Legal age thresholds are important to clarify legal and criminal liability. For discriminating children from adults, it is taken into account whether individuals have attained the age of 18 years. The aim of this study was to test the accuracy of the mineralization and eruption stages of the third molars for the discrimination of the age of 18 years and to examine the effect of the combined use of both indicators on the prediction performance.
Materials and Methods: Panoramic radiographs of 449 patients aged between 13 and 24 years were included in the study. The mineralization stages of the maxillary and mandibular third molars were scored ranged from A to H using Demirjian method, and the eruption stages ranged from A to D using Olze method. The cut-offs of the stages for both methods were determined in terms of the age threshold of 18 years. The performance of the identified cut-offs individually and in combination for the prediction of the age of 18 years was evaluated by ROC (Receiver Operating Characteristic) analysis.
Results: There was no significant difference between the right and left sides in the mineralization and eruption stages of the third molars while it was found that the maxillary molars were advanced in mineralization and delayed in eruption compared to the mandibular molars. The cut-offs of mineralization and eruption stages were determined as H and B in maxillary molars, G and C in mandibular molars, respectively. The eruption stages of all third molars provided an accuracy of 87% in the discrimination of the age of 18 years while the mineralization stages showed accuracy ranging from 89% to 92%. When both methods were used in combination, it was observed that the accuracy varied between 87% and 89%.
Conclusion: Mineralization and eruption methods can be useful in forensic practice as supplementary methods with high and moderate accuracy for the estimation of the age of 18 years. However, the eruption stages of the third molars did not significantly contribute to the prediction performance of the mineralization stages for the age threshold of 18 years.
Keywords: Age determination by teeth; Tooth calcification; Panoramic radiography; Child; Adult.

Anahtar Kelimeler

Dişlerden yaş tespiti, Diş kalsifikasyonu, Panoramik radyografi, Çocuk; Erişkin

Kaynakça

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