Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.

Detalhes bibliográficos
Autor(a) principal: Marinucci, Tiziano
Data de Publicação: 2013
Tipo de documento: Dissertação
Idioma: eng
Título da fonte: Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
Texto Completo: http://hdl.handle.net/10316/36722
Resumo: Trabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina Dentária apresentado à Faculdade de Medicina da Universidade de Coimbra.
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spelling Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.Trabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina Dentária apresentado à Faculdade de Medicina da Universidade de Coimbra.Background: Micromovements in the implant-abutment connection may influence periimplant bone preservation, especially in the cervical region of the implant. The purpose of this study was to evaluate and quantify these micromovements after repeated cycles of tightening and loosening the prosthetic screw using the method of three dimensional image correlation (DIC 3D). Materials and Methods: 10 Mis® Seven internal hexagon 4.2x13 implants were included in an acrylic block with similar elasticity of bone and randomly allocated into 2 groups. Mis® Titanium abutments (Standard cementing post, anti-rotational) were screwed to the implants at 30Ncm torque and loaded up to 200N with an universal testing machine (AG-I Shimadzu®) at a 30º angle. Samples were then randomly allocated into two groups. Group I was submitted to one cycle of loosening and retightening of the abutment screw and group II was submitted to 2 consecutive cycles of loosening and tightening of the abutment screw. Each sample was loaded again and the micromovements captured with Vic-3D (Correlated Solutions, Inc), in three axis U, V, W, corresponding to the movements in the mesio-distal, vertical and antero-posterior directions, statistical analysis was performed using SPSS 20.0, considering independent samples t-test for group comparison and paired samples t-test for intra-group comparison. Mixed ANOVA was used to determine the interaction of screw loosening and tightening cycles and load on the micromovements of the abutments. Results: No statistically significant differences were found between groups regarding the three directions, under any load. Also, no statistically significant differences were found between micromovements before and after the screwing cycles for each group. However, absolute displacement was higher in Group II under 100N load than in Group I after the protocol with a statistically significant difference of -0.168 (95% CI, -0.321 to -0.016), t(8)=-2.55, p=0.03. Conclusion: The implant/abutment connection according to the protocol performed, demonstrated good resistance and a precise fit between these interfaces, therefore, in case of unscrewing is not justified changing the screw.2013info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/masterThesishttp://hdl.handle.net/10316/36722http://hdl.handle.net/10316/36722engMarinucci, Tizianoinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-01-20T17:48:51Zoai:estudogeral.uc.pt:10316/36722Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T20:45:35.542330Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse
dc.title.none.fl_str_mv Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.
title Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.
spellingShingle Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.
Marinucci, Tiziano
title_short Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.
title_full Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.
title_fullStr Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.
title_full_unstemmed Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.
title_sort Influence of repeated tightening and loosening of the prosthetic screw in micromovements abutment / implant.
author Marinucci, Tiziano
author_facet Marinucci, Tiziano
author_role author
dc.contributor.author.fl_str_mv Marinucci, Tiziano
description Trabalho final do 5º ano com vista à atribuição do grau de mestre no âmbito do ciclo de estudos de Mestrado Integrado em Medicina Dentária apresentado à Faculdade de Medicina da Universidade de Coimbra.
publishDate 2013
dc.date.none.fl_str_mv 2013
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://hdl.handle.net/10316/36722
http://hdl.handle.net/10316/36722
url http://hdl.handle.net/10316/36722
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.source.none.fl_str_mv reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron:RCAAP
instname_str Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
instacron_str RCAAP
institution RCAAP
reponame_str Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
collection Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)
repository.name.fl_str_mv Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação
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