RESUMO
OBJECTIVES: To investigate the age-related changes of the mandibular third molar root pulp visibility in individuals in East China, and to explore the feasibility of applying this method to determine whether an individual is 18 years or older. METHODS: A total of 1 280 oral panoramic images were collected from the 15-30 years old East China population, and the mandibular third molar root pulp visibility in all oral panoramic images was evaluated using OLZE 0-3 four-stage method, and the age distribution of the samples at each stage was analyzed using descriptive statistics. RESULTS: Stages 0, 1, 2 and 3 first appeared in 16.88, 19.18, 21.91 and 25.44 years for males and in 17.47, 20.91, 22.01 and 26.01 years for females. In all samples, individuals at stages 1 to 3 were over 18 years old. CONCLUSIONS: It is feasible to determine whether an individual in East China is 18 years or older based on the mandibular third molar root pulp visibility on oral panoramic images.
Assuntos
Determinação da Idade pelos Dentes , Polpa Dentária , Dente Serotino , Radiografia Panorâmica , Raiz Dentária , Humanos , Dente Serotino/diagnóstico por imagem , Masculino , Adolescente , Feminino , Adulto , Adulto Jovem , China , Raiz Dentária/diagnóstico por imagem , Determinação da Idade pelos Dentes/métodos , Polpa Dentária/diagnóstico por imagem , Mandíbula/diagnóstico por imagem , Odontologia Legal/métodos , Fatores EtáriosRESUMO
Two new steroidal ketones (1, 2), together with 10 known steroids (3-12) and five known steroidal saponins (13-17), have been obtained from the pitch of Tetrapanax papyrierus. The structures of 1 and 2 were elucidated as 3ß-hydroxystigmast-8, 22-diene-7,11-dione and 3ß-hydroxystigmast-8-ene-7,11-dione by IR, HR-ESI-MS, 1D and 2D NMR techniques. Except for 4, 14, 15, 16, 13 compounds reported in this paper were isolated from Tetrapanax papyriferus for the first time.