ABSTRACT
Aim: The aim of this study was to investigate the biomechanical behavior of implant-retained mandibular overdentures using Micro ERA® system with different implant position and angulation by finite element analysis (FEA). Methods: Four 3D finite element models of simplified mandibular overdentures were constructed, using one Bränemark implant with a Micro ERA® attachment. The implant was positioned on the canine or lateral incisor area with an angulation of either 0º (C-0º; LI-0º) or 17º (C-17º, LI-17º) to the vertical axis. A 100 N axial load was applied in one side simultaneously, from first premolar to second molar. In all models it was analyzed the overdenture displacement, compressive/tensile stress in the bone-implant interface, and also the von Mises equivalent stress for the nylon component of the housing. The stresses were obtained (numerically and color-coded) for further comparison among all the groups. Results: The displacement on the overdenture was higher at the posterior surface for all groups, especially in the C-17º group. When comparing the compressive/tensile stress in the bone-implant interface, the lateral-incisor groups (LI-0º and LI-17º) had the highest compressive and lowest tensile stress compared to the canine groups (C-0º and C-17º). The von Mises stress on the nylon component generated higher stress value for the LI-0º among all groups. Conclusions: The inclination and positioning of the implant in mandibular overdenture interferes directly in the stress distribution. The results showed that angulated implants had the highest displacement. While the implants placed in the lateral incisor position presented lower compressive and higher tensile stress respectively. For the attachment the canine groups had the lowest stress
Subject(s)
Dental Implants , Finite Element Analysis , Denture, OverlayABSTRACT
RESUMO Este trabalho verificou a opinião de acadêmicos da Saúde sobre a inserção do conteúdo fitoterapia nos cursos de graduação. Trata-se de estudo transversal e analítico, realizado com aplicação de questionário a alunos de Enfermagem, Medicina e Odontologia em 2011. Participaram 248 acadêmicos, a maioria do sexo feminino (69,8%), com idade entre 17 e45 anos. Os estudantes (70,8%) mostraram interesse pela inclusão da fitoterapia, sem diferença entre os sexos (p= 0,757), sendo 83,1% da Enfermagem, 68,2% da Medicina e 63,0% da Odontologia (p=0,019). Entre as motivações destacam-se: ampliação do conhecimento (35,7%) e constatação da evidência científica (16,5%). O desconhecimento da Política Nacional de Práticas Integrativas e Complementares foi de 84,7% na Enfermagem, 84,6% na Medicina e 74,7% na Odontologia (p=0,166), sem diferença significativa entre os sexos (p= 0,333). Conclui-se que os estudantes são favoráveis à inserção do conteúdo fitoterápico no currículo, embora desconheçam a Política Nacional de Práticas Integrativas e Complementares, regulamentada para o sistema de saúde brasileiro.
ABSTRACT This study examined the views of health academics about the inclusion of herbal medicine content in undergraduate courses. It is cross-sectional analytical study, with a questionnaire applied tonursing, medical and dentistry students in 2011. The study involved248 students, mostly women (69.8%), aged 17-45 years. The students (70.8%) showedinterest in the inclusion of herbal medicine, with no difference between genders (p = 0.757) and 83.1% of nursing, 68.2% and 63.0% of medical and dentistry students (p = 0.019), respectively. The reasons given for this include: expansion of knowledge (35.7%) and finding scientific evidence (16.5%). 84.7% of the nursing students, 84.6% ofthe medical students and 74.7% of the dentistry students (p = 0.166) did not know about the National Policy on Integrative and Complementary Practices, with no significant difference between genders (p = 0.333). In conclusion, students favor the inclusion of herbal medicine content in the curriculum, despite being unaware of the National Policy on Integrative and Complementary Practices, regulated forthe Brazilian health system.