{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,2,21]],"date-time":"2025-02-21T14:36:39Z","timestamp":1740148599626,"version":"3.37.3"},"reference-count":26,"publisher":"Georg Thieme Verlag KG","issue":"02","license":[{"start":{"date-parts":[[2024,4,10]],"date-time":"2024-04-10T00:00:00Z","timestamp":1712707200000},"content-version":"vor","delay-in-days":9,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Rev Bras Ortop (Sao Paulo)"],"published-print":{"date-parts":[[2024,4]]},"abstract":"<jats:title>Resumo<\/jats:title><jats:p>\n          Objetivo\u2003Avaliar a estabilidade de osteotomias criadas nas regi\u00f5es subtrocant\u00e9rica e trocant\u00e9rica em modelo de f\u00eamur pedi\u00e1trico, fixadas por hastes intramedulares flex\u00edveis.<\/jats:p><jats:p>\n          M\u00e9todo\u2003A partir de um modelo de f\u00eamur pedi\u00e1trico com duas hastes el\u00e1sticas de tit\u00e2nio, foram obtidos cortes tomogr\u00e1ficos que foram convertidos para um modelo tridimensional. Neste modelo foi criado uma malha com elementos tetra\u00e9dricos, de acordo com o m\u00e9todo dos elementos finitos. Foram obtidos tr\u00eas modelos virtuais, e realizadas osteotomias em regi\u00f5es diferentes: mediodiafis\u00e1ria, subtrocant\u00e9rica e trocant\u00e9rica. Foi aplicado um carregamento vertical de 85N no topo da cabe\u00e7a do f\u00eamur, obtidos os deslocamentos, a tens\u00e3o m\u00e1xima e m\u00ednima principal e tens\u00e3o equivalente de Von Mises no implante.<\/jats:p><jats:p>\n          Resultados\u2003Com o carregamento aplicado foram observados deslocamentos no local da osteotomia de 0,04mm no grupo diafis\u00e1rio, 0,5mm no subtrocant\u00e9rico e 0,06mm no trocant\u00e9rico. A tens\u00e3o m\u00e1xima principal foi 10,4Pa, 7,52Pa e 26,4Pa nos grupos diafis\u00e1rio, subtrocant\u00e9rico e trocant\u00e9rico, respectivamente. Ou seja, a tens\u00e3o m\u00e1xima foi em torno de 40% maior no grupo trocant\u00e9rico, em rela\u00e7\u00e3o ao diafis\u00e1rio (controle). A face de tens\u00e3o m\u00ednima do osso localizou-se na cortical interna do f\u00eamur. A tens\u00e3o equivalente de Von Mises nos implantes ocorreu na osteotomia, com valor m\u00e1ximo de 27,6Pa no grupo trocant\u00e9rico.<\/jats:p><jats:p>\n          Conclus\u00e3o\u2003Tanto nas osteotomias no n\u00edvel trocant\u00e9rico, quanto subtrocant\u00e9rico, a estabilidade da fixa\u00e7\u00e3o foi muitas vezes menor que no modelo diafis\u00e1rio, sugerindo que as hastes intramedulares flex\u00edveis n\u00e3o s\u00e3o implantes adequados para as fixa\u00e7\u00f5es proximais do f\u00eamur.<\/jats:p>","DOI":"10.1055\/s-0044-1785467","type":"journal-article","created":{"date-parts":[[2024,4,10]],"date-time":"2024-04-10T23:49:07Z","timestamp":1712792947000},"page":"e278-e283","source":"Crossref","is-referenced-by-count":0,"title":["Estabilidade de osteotomias proximais em modelos do f\u00eamur pedi\u00e1trico fixadas por hastes intramedulares flex\u00edveis e avaliadas pelo m\u00e9todo dos elementos finitos"],"prefix":"10.1055","volume":"59","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-9362-0131","authenticated-orcid":false,"given":"M\u00e1rio Augusto Ferreira","family":"Cruz","sequence":"additional","affiliation":[{"name":"Universidade Tiradentes, Aracaju, Sergipe, Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0977-8658","authenticated-orcid":false,"given":"Jos\u00e9 Vin\u00edcius Lima","family":"Santana","sequence":"additional","affiliation":[{"name":"Universidade Tiradentes, Aracaju, Sergipe, Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0432-8487","authenticated-orcid":false,"given":"Leonardo Rigobello","family":"Battaglion","sequence":"additional","affiliation":[{"name":"Laborat\u00f3rio de Bioengenharia, Faculdade de Medicina de Ribeir\u00e3o Preto, Universidade de S\u00e3o Paulo (FMRP-USP), Ribeir\u00e3o Preto, S\u00e3o Paulo, Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1999-7352","authenticated-orcid":false,"given":"Jos\u00e9 Batista","family":"Volpon","sequence":"additional","affiliation":[{"name":"Departamento de Ortopedia e Anestesiologia, Faculdade de Medicina de Ribeir\u00e3o Preto, Universidade de S\u00e3o Paulo (FMRP-USP), Ribeir\u00e3o Preto, S\u00e3o Paulo, Brasil"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"194","published-online":{"date-parts":[[2024,4,10]]},"reference":[{"key":"ref1","first-page":"77","volume-title":"Les fractures du f\u00e9mur","author":"J P M\u00e9taizeau","year":"1988"},{"issue":"07","key":"ref2","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1590\/S0102-36162008000700001","article-title":"Osteoss\u00edntese das fraturas diafis\u00e1rias da crian\u00e7a com hastes intramedulares flex\u00edveis","volume":"43","author":"J Volpon","year":"2008","journal-title":"Rev Bras 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