Konik ışınlı bilgisayarlı tomografi görüntülerinde yaş ve cinsiyet tahmini için birinci molar diş ölçümlerinin kullanılabilirliği

Amaç: Yaşlanmaya bağlı olarak diş yapısında meydana gelen morfolojik değişiklikler erişkin dönemde önem kazanmaktadır. Bu yaşa bağlı değişiklikler yaş ve cinsiyeti belirlemek için kullanılabilir. Konik ışınlı bilgisayarlı tomografi (KIBT) ile elde edilen birinci molar diş ölçümlerinin Türk çalışma grubunda kronolojik yaş ve cinsiyet tahmininde kullanılabilirliğini belirlemek bu çalışmanın amacıdır.Gereç ve yöntem: Kronolojik yaşı ve cinsiyeti bilinen 12 yaşından büyük 332 hastanın KIBT görüntüleri iki gözlemci tarafından ayrı ayrı yapılan yarı otomatik bölümleme ile değerlendirildi. Her hastada maksiller veya mandibular molar dişten pulpa hacmi ve diş hacmi ölçüldü. Ölçümleri kullanarak yaş ve cinsiyeti tahmin etmek için basit doğrusal regresyon analizi ve diskriminant fonksiyon analizi yapıldı. Ayrıca cinsiyet ve diş pozisyonuna göre ölçümleri karşılaştırmak için bağımsız örneklem t testi kullanıldı.Bulgular: Cinsiyet, kadınların %76.6'sında ve erkeklerin %56.3'ünde maksiller birinci molar hacim oranı ile tahmin edilmiştir. Pulpa/diş hacmi oranı (PDHO) ile yaş tahmini (YT), erkeklerde ve maksiller birinci molarlarda daha etkili sonuçlar vermiştir.Sonuç: Bu çalışmada maksiller birinci molar dişlerin hacim oranının erkeklerde yaş tahmininde, kadınlarda cinsiyet tahmininde (CT) daha doğru sonuçlar verdiği bulundu.

Anahtar Kelimeler:

Azı dişleri, Cinsiyet belirleme analizi, Diş pulpa hacmi, Dişlerle yaş tayini, Konik ışınlı bilgisayarlı tomografi

Usability of first molar teeth measurements for age and sex estimation in cone-beam computed tomography images

Aim: The morphological changes in tooth structure due to aging gain importance in the adult period. These age-related changes can be used to determine age and sex. The aim of this study was to determine the usability of first molar tooth measurements obtained by cone beam computed tomography (CBCT) in estimating chronological age and sex in Turkish study group.Materials and methods: Three-dimensional images of 332 patients older than 12 years of age with known chronological age and sex were evaluated by semi-automatic segmentation performed separately by two observers. Pulp volume and tooth volume were measured from maxillary or mandibular molar tooth in each patient. Simple linear regression analysis and discriminant function analysis were performed to estimate age and sex using the measurements. In addition, independent sample t-test was used to compare the measurements according to sex and tooth position. Results: Sex was estimated by maxillary first molar volume ratio in 76.6% of women and 56.3% of men. Age estimation (AE) with pulp/tooth volume ratio (PTVR) gave more effective results in males and maxillary first molars.Conclusions: In this study, it was found that maxillary first molar volume ratio gave more accurate results in males AE and in females’ sex estimation (SE).

Keywords:

Age determination by teeth, Cone beam computed tomography, Dental pulp volume, Molar teeth, Sex determination analysis,

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