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Dental Age Assessment by I2M and I3M: Portuguese Legal Age Thresholds of 12 and 14 Year Olds

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Dental age assessment by I2M and I3M Portuguese legal age thresholds of 12 and 14 year olds.pdfObjective: Better understanding of dental age assessment may help in cases of age estimation in Forensic Clinics. The first aim was to provide essential information on method reliability for upcoming studies using dental age assessment by second molar index (I2M), and third molar index (I3M) for age estimation on legal ages of 12 - 14 years. The second aim was to document forensic method outcomes of the Demirjian method which has already been used in forensic clinic. Material and methods: Two samples were used for this purpose: for I2M, 633 orthopantomographs (270 females / 363 males), the age range from 7 to 17 years and for I3M, 471 orthopantomographs (253 females / 218 males), the age range from 10 to 23 years, from the database population of Lisbon North University Hospital Center, approved by the Ethic Committee. Results: The I3M cut-off point (1.133) for 12- year-olds obtained better results than the cut-off point stated by the I2M (0.135). Besides, I2M cut-off point (0.001) for 14- year- olds showed better results when compared with the cut-off point (0.705) established by the I3M. Both methods are reliable for the legal age thresholds of 12 and 14 years. However, using I2M and I3M allows us to vary the cut-off value to privilege sensitivities or specificity, depending on which is more appropriate to the intended application. Conclusions: The accuracy (88.94%) of I3M obtained better results for the 12- year- old cut-off point (1.133) and the accuracy (90.21%) of the I2M performed better for the 14- year- old cut-off point (0.001).397.04 KBAdobe PDF Ver/Abrir

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Objective: Better understanding of dental age assessment may help in cases of age estimation in Forensic Clinics. The first aim was to provide essential information on method reliability for upcoming studies using dental age assessment by second molar index (I2M), and third molar index (I3M) for age estimation on legal ages of 12 - 14 years. The second aim was to document forensic method outcomes of the Demirjian method which has already been used in forensic clinic. Material and methods: Two samples were used for this purpose: for I2M, 633 orthopantomographs (270 females / 363 males), the age range from 7 to 17 years and for I3M, 471 orthopantomographs (253 females / 218 males), the age range from 10 to 23 years, from the database population of Lisbon North University Hospital Center, approved by the Ethic Committee. Results: The I3M cut-off point (1.133) for 12- year-olds obtained better results than the cut-off point stated by the I2M (0.135). Besides, I2M cut-off point (0.001) for 14- year- olds showed better results when compared with the cut-off point (0.705) established by the I3M. Both methods are reliable for the legal age thresholds of 12 and 14 years. However, using I2M and I3M allows us to vary the cut-off value to privilege sensitivities or specificity, depending on which is more appropriate to the intended application. Conclusions: The accuracy (88.94%) of I3M obtained better results for the 12- year- old cut-off point (1.133) and the accuracy (90.21%) of the I2M performed better for the 14- year- old cut-off point (0.001).
Cilj: Bolje razumijevanje dentalne procjene dobi moglo bi pomoći pri procjeni dobi u kliničkoj forenzici. Prvi cilj bio je osigurati ključne informacije o pouzdanosti metode za buduća istraživanja koja bi se koristila dentalnom procjenom s pomoću indeksa drugog molara (I2M) te indeksa trećeg molara (I3M) za procjenu legalne dobi od 12 do 14 godina. Drugi cilj bio je dokumentirati forenzičke ishode Demirjianove metode koja se već primjenjuje u kliničkoj forenzici. Materijal i metode: Za ovu svrhu korištena su dva uzorka – za I 2M 633 ortopantomograma (270 od djevojčica i djevojaka i 363 od dječaka i mladića u dobi od 7 do 17 godina), a za I 3M 471 ortopantomogram (253 od djevojčica i djevojaka i 218 od dječaka i mladića u dobi od 10 do 23 godine). Svi su uzeti iz baze podataka Sveučilišnoga bolničkog centra Lisabon – Sjever, a njihovu upotrebu odobrilo je Etičko povjerenstvo.Rezultati: Granična točka I 3M za 12-godišnjake (1,133) dala je bolje rezultate od one za I 2M. Nadalje, granična točka I 2M za 14-godišnjake (0,001) pokazala je bolje rezultate od granične točke I 3M (0,705). Obje su metode pouzdane za određivanje dobi od 12 i 14 godina prema zakonu. No, korištenje I 3M i I 2M omogućuje pomicanje granične vrijednosti zbog osjetljivosti ili specifičnosti, ovisno o adekvatnoj primjeni. Zaključak: Točnost I 3M (88,94 %) davala je bolje rezultate kada se određivala granična vrijednost 12- godišnjaka (1,133), a točnost I 2M (90,21 %) bila je bolja u slučaju 14-godišnjaka (0,001).

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Idioma alternativo - Croata

Palavras-chave

Dental age assessment Cameriere’s I3M and I2M Demirjian’s method Portuguese penal code Legal age threshold 12 and 14- yearolds dentalna procjena dobi Cameriereov I3M i I2M Demirjianova metoda portugalski Kazneni zakon 12-godišnjaci 14-godišnjaci

Contexto Educativo

Citação

Augusto, D., Pereira, C.P., Rodrigues, A., Cameriere, R., Salvado, F. & Santos, R. (2021). Dental Age Assessment by I 2M and I 3M : Portuguese Legal Age Thresholds of 12 and 14 Year Olds. Acta stomatologica Croatica, 55 (1), 45-55. https://doi.org/10.15644/asc55/1/6.

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University of Zagreb

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