Avaliação da influência do diâmetro e comprimento do implante osseointegrado associado à PPR Classe I mandibular pelo método dos elementos finitos
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Data
2003
Autores
Verri, Fellippo Ramos [UNESP]
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Universidade Estadual Paulista (Unesp)
Resumo
A influência do diâmetro e do comprimento de implantes osseointegrados em associação com próteses parciais removíveis de extremidade livre (PPRELs) ainda não foi relatada na literatura. Dessa forma, este trabalho visou avaliar a esta influência, utilizando o método dos elementos finitos (MEF) bi-dimensional, associando implantes osseointegrados do sistema Branemark sob a base protética de uma PPREL, funcionando apenas como suporte, e analisando mapas de deslocamento e de tensão de von Mises. Para o estudo foram confeccionados oito modelos representativos de uma hemi-arcada mandibular com a presença apenas dos dentes 33 e 34, com as seguintes características: A - sem PPR; B - com PPR sem implante; C - com PPR e implante de 3,75 x 7,00 mm; D - com PPR e implante de 3,75 x 10,00 mm; E - com PPR e implante de 3,75 x 13,00 mm; F - com PPR e implante de 5,00 x 7,00 mm; G - com PPR e implante de 5,00 x 10,00 mm; H - com PPR e implante de 5,00 x 13,00 mm. As forças aplicadas foram estritamente verticais e de 50 N em cada ponta de cúspide. Pelos resultados notou-se que a presença da PPR sobrecarregou o dente suporte, bem como as demais estruturas de suporte da PPR quando comparadas com o modelo A. A presença do implante diminuiu as tensões, principalmente nas extremidades do rebordo desdentado, quando comparados o modelo B com os modelos que possuíam implantes associados. Tanto o comprimento quanto o diâmetro do implante tenderam a diminuir as tensões à medida que aumentavam suas dimensões. Pelos resultados foi possível concluir que: o modelo B foi o que apresentou a maior tendência a deslocamento; quanto maior o comprimento do implante, menores foram os valores do mapa de deslocamento; o modelo B apresentou níveis de tensão de von Mises superiores ao modelo A; os modelos com implantes associados apresentaram níveis menores de tensão de von Mises que o modelo B nas estruturas de suporte da PPR.
The influence of the diameter and length of osseointegrated implants in association with removable partial prostheses of distal-extension (DERPDs) it was not still reported in the literature. In that way, this study evaluated this influence, associating osseointegrated implants of the Branemark system under the prosthetic base of a DERPD, just working as support, and analyzing displacement and von Mises tension maps, using bi-dimensional finite element analysis (FEA). For this study, eight representative models of a lower hemi-arcade were made with the presence of only the teeth 33 and 34, with the following characteristics: A - without RPD; B - with RPD and without implants; C - with RPD and implant of 3,75 x 7,00 mm; D - with RPD and implant of 3,75 x 10,00 mm; E - with RPD and implant of 3,75 x 13,00 mm; F - with RPD and implant of 5,00 x 7,00 mm; G - with RPD and implant of 5,00 x 10,00 mm; H - with RPD and implant of 5,00 x 13,00 mm. The applied forces were strictly vertical and of 50 N in each edge tip. The results shown that the presence of RPD overloaded the support tooth, as well as the other structures of support of RPD when compared with the model A. The presence of the implants reduced the tensions, mainly in the extremities of the toothless edge, when compared model B with the models that possessed implant associated. So much the length as the diameter of the implants tended to reduce the tensions as increased your dimensions. For the results it was possible to conclude that: the model B was what presented the largest tendency to displacement; as larger the length of the it implants, smaller they were the values of the displacement map; the model B presented levels of von Mises tension superiors to the model A; the models with implant associated presented smaller levels of von Mises tension that the model B in the structures of support of RPD; the increase of the length and of the diameter of the implants.
The influence of the diameter and length of osseointegrated implants in association with removable partial prostheses of distal-extension (DERPDs) it was not still reported in the literature. In that way, this study evaluated this influence, associating osseointegrated implants of the Branemark system under the prosthetic base of a DERPD, just working as support, and analyzing displacement and von Mises tension maps, using bi-dimensional finite element analysis (FEA). For this study, eight representative models of a lower hemi-arcade were made with the presence of only the teeth 33 and 34, with the following characteristics: A - without RPD; B - with RPD and without implants; C - with RPD and implant of 3,75 x 7,00 mm; D - with RPD and implant of 3,75 x 10,00 mm; E - with RPD and implant of 3,75 x 13,00 mm; F - with RPD and implant of 5,00 x 7,00 mm; G - with RPD and implant of 5,00 x 10,00 mm; H - with RPD and implant of 5,00 x 13,00 mm. The applied forces were strictly vertical and of 50 N in each edge tip. The results shown that the presence of RPD overloaded the support tooth, as well as the other structures of support of RPD when compared with the model A. The presence of the implants reduced the tensions, mainly in the extremities of the toothless edge, when compared model B with the models that possessed implant associated. So much the length as the diameter of the implants tended to reduce the tensions as increased your dimensions. For the results it was possible to conclude that: the model B was what presented the largest tendency to displacement; as larger the length of the it implants, smaller they were the values of the displacement map; the model B presented levels of von Mises tension superiors to the model A; the models with implant associated presented smaller levels of von Mises tension that the model B in the structures of support of RPD; the increase of the length and of the diameter of the implants.
Descrição
Palavras-chave
Protese dentaria parcial removivel, Implantes dentários osseointegrados, Biomecânica, Método dos elementos finitos, Denture, partial, removable, Dental implantation, Biomechanics, Análise de elemento finito
Como citar
VERRI, Fellippo Ramos. Avaliação da influência do diâmetro e comprimento do implante osseointegrado associado à PPR Classe I mandibular pelo método dos elementos finitos. 2003. 202 f. Dissertação (mestrado) - Universidade Estadual Paulista, Faculdade de Odontologia de Araçatuba, 2003.