RESUMO Objetivo: Avaliar o dimorfismo sexual, por meio da aplicação de IR em imagens tomográficas. Métodos: Foram analisados 78 exames de tomografia computadorizada de feixe cônico (TCFC), de pacientes do sexo feminino e masculino. As imagens foram obtidas do banco de dados do LAPI-FOUSP, São Paulo, Brasil, e por meio delas o Índice Mentual, que é um IR quantitativo, foi avaliado. As imagens foram divididas em 2 grupos: Grupo M – Homens e Grupo W – Mulheres e avaliadas por um examinador em dois tempos diferentes (T1 e T2). Os dados foram submetidos a análise estatística com nível de significância de 95% (p<0,05). Resultados: O teste ICC mostrou uma concordância intra-examinador média a boa. As médias de idade foram: 48,46±15,3 para o grupo M e 53,87±13,09 para o grupo H. Na avaliação do IM, foram observadas diferenças estatisticamente significantes entre os dois grupos. Conclusão: Concluímos que o Índice Mentual pode ser utilizado para determinar o dimorfismo sexual, uma vez que a espessura da cortical da mandíbula nas mulheres é menor que a espessura encontrada nos homens.
ABSTRACT Objective: Radiomorphometric indices (RI) vary according to gender and age. The objective of this study was to assess bone quality in men and women, using tomographic images Methods: A total of 78 Cone Beam Computed Tomography (CBCT) images of female and male patients were analyzed. The images were obtained from LAPI-FOUSP database, São Paulo, Brazil, and the Mental Index, which is a quantitative index, was evaluated on those images. The images were divided into 2 groups: Group M – Men and Group W – Women and evaluated by one examiner in two different times (T1 and T2). The data was submitted to a statistical analysis with a 95% level of significance (p <0.05) Results: The ICC tests showed an average to good intra-examiner agreement. The age averages were: 48.46 ± 15.3 for group W and 53.87 ± 13.09 for group M. On the MI evaluation, statistically significant differences were observed between the two groups Conclusion: We concluded that MI can be used to determine sexual dimorphism, once the thickness of the mandible cortex in women is smaller than the thickness found in men.
OBJECTIVE: Hematopoietic stem-cell transplantation (HSCT) childhood survivors of hematologic malignancies are prone to develop late osteopenia and osteoporosis. The purpose of this retrospective study was to quantitatively and qualitatively assess bone mineral density (BMD) in HSCT childhood survivors and to compare the effectiveness of both qualitative and quantitative assessment methods. METHODS: DESIGN BMD assessment using panoramic radiographs of childhood HSCT survivors aged 3.69-18.88 years using two radiomorphometric indexes. Case-control double-blinded comparison of panoramic radiographic images from childhood HSCT survivors and age- and sex-matched healthy controls. Quantitative assessment was performed by measuring the cortical bone width bilaterally at the mental foramen level. Qualitative assessment was performed using the mandibular cortical index bilaterally on all panoramic images. RESULTS: Radiographs were taken 6.59-83.95 months after bone marrow transplantation [median±SD=25.92±24.9 months]. Fifty-two panoramic radiographic images were analyzed: 21 from HSCT survivors and 31 from healthy controls aged 3.69-25.1 years [mean±SD=11.89±5.28 years]. The mandibular cortical bone width was 17% smaller in childhood HSCT survivors than in healthy controls (case group: 2.420, control group: 3.307; p=0.00617). Qualitative analysis revealed an increased frequency of severe mandibular cortical erosion in childhood HSCT survivors, although no significant difference was observed (case group: 1.540, control group: 1.490; p=0.32). The interobserver agreement was 85% (Kappa index). CONCLUSIONS: HSCT childhood survivors exhibit quantitative and qualitative mandibular bone impairments. Further studies are needed to establish an association between mandibular cortical bone impairment and osteoporosis.