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No. of bitstreams: 1 JOAO_LOPES_BONDAN_TES.pdf: 2360015 bytes, checksum: b0622efe2634c60233691e20bf7f7283 (MD5) Previous issue date: 2017-09-01 / Coordena??o de Aperfei?oamento de Pessoal de N?vel Superior - CAPES / The aim of this study was to analyze both the adaptation conformity of switching platform prosthetic components and their behavior in fatigue mechanical tests. The subject was split into two manuscripts according to the scope of two specific journals in the area of oral rehabilitation. The manuscript 1 presents a literature review that enlightened concepts related to the usage of the switching platform and its biological benefits demonstrated in the literature. However, factors associated with the biomechanical stability provided by this new concept have shown to be a coarsely explored area by science. Thus, such factors need to be better understood and confirmed by studies evaluating biomechanical issues of this platform. After demonstrating this shortage in the literature review, a laboratory study started, aiming at responding questions linked to the long term prosthetic stability. The manuscript 2 assessed the adaptation conformity of switching components confronted to mechanical cycling tests. The methodology was based on 40 prosthetic components for unity rehabilitations on implants standard HE 4.1 RP, being divided in four groups: 10 components UCLA 4.1 mm (group UC 4.1), 10 components UCLA 3.6 mm (group UC 3.6) , 10 components type conic abutment 4.1 mm (group AC 4.1) and 10 conic abutment 3.6 mm (group AC 3.6) on the respective implant standard RP HE 4.1 mm. The groups have been evaluated by Energy Dispersive Spectroscopy (EDS) to confirm the manufacture standard of the samples. Scanning electronic microscopy (SEM) was used to evaluate the adaptation in the vertical (FV) and horizontal (DH) directions. For the statistical analysis of the FV data, Kruskal-wallis and Crosstabs were used. One-way analysis of variance (ANOVA) and Tukey (5%) were used for the DH data. The four groups of components (UC 4.1, UC 3.6, AC 4.1, AC 3.6 ) were prepared according to the ISO 14801: 2007 standard and submitted to 1,000,000 cycles, with a load of 100 N and frequency of 1 Hz in a universal fatigue testing machine. Results indicated conformity of adaptation (FV) among components varying from 70% to 90%. Concerning DH, the two groups of switching components (UC 3.6 and AC 3.6) presented a negative gap of 7.07% and 5.36% respectively in relation to the regular platform, while the RP groups (UC 4.1 and AC 4.1) presented a negative gap of 1.21% and 0% (p?0.05). The loss of torque after the cycling test were: 25% (UC 4.1), 39% (UC 3.6), 38% (AC 4.1) and 51% (AC 3.6), (p? 0.01). Hence, the result of the present study indicate that the switching platform components present a favorable short-term biological behavior according to the literature, but limited biomechanical behavior. In adaptation factor, there is a strong degree of precision in almost all samples in terms of FV. DH is noticed in all groups. It is also noticeable that in the platform switching groups the loss of torque after mechanical cycling test was larger. / O estudo objetivou analisar a conformidade de adapta??o de componentes prot?ticos de padr?o switching e o comportamento dos mesmos frente a teste mec?nico de fadiga, dispostos em dois manuscritos de acordo com a norma e perfil de publica??o de duas revistas espec?ficas da ?rea de reabilita??o oral. No manuscrito 1 foi realizada uma revis?o liter?ria, que elucidou conceitos relacionados ? utiliza??o da filosofia switching e seus benef?cios biol?gicos evidenciados pela literatura. No entanto, fatores relacionados com estabilidade biomec?nica associados a esse novo conceito demonstraram-se constituir uma tem?tica pouco explorada e evidenciada pela ci?ncia, necessitando, serem melhor compreendidos e confirmados por estudos que avaliem quest?es biomec?nicas sobre esta filosofia. Atrav?s dessa car?ncia demonstrada pela revis?o liter?ria, passou-se a etapa de estudo laboratorial, objetivando buscar respostas a quest?es envolvendo a estabilidade prot?tica de longo prazo. O manuscrito 2 avaliou a conformidade de adapta??o de componentes switching e seu comportamento frente a testes de ciclagem mec?nica, tendo como metodologia o uso de 40 componentes prot?ticos para reabilita??es unit?rias sobre implantes padr?o Hex?gono Externo 4,1 Plataforma Regular, sendo divididos em quatro grupos: 10 componentes UCLA de 4,1 mm (grupo UC 4,1), 10 componentes UCLA de 3,6 mm (grupo UC 3,6) , 10 componentes tipo pilares c?nicos de 4,1 mm (grupo AC 4,1) e 10 pilares c?nicos de 3,6 mm (grupo AC 3,6) sobre referido implante padr?o RP Hex?gono Externo 4,1 mm. Os grupos foram avaliados por Espectroscopia de Energia Dispersiva (EDS) para confirmar o padr?o de manufatura das amostras, e tamb?m comparada a adapta??o com aux?lio de Microscopia Eletr?nica de Varredura (MEV) quanto a Fenda Vertical (FV) e Discrep?ncia Horizontal (DH). Para a an?lise estat?stica dos dados de FV, aplicou-se os testes de Kruskal-wallis e Crosstabs, e para DH o procedimento de an?lise de Vari?ncia (Anova-Oneway) e de Tukey, ao n?vel de signific?ncia de 5%. Os quatro grupos de componentes (UC 4,1, UC 3,6, AC 4,1, AC 3,6 ) foram preparados conforme norma ISO 14801: 2007 e submetidos ? 1.000.000 de ciclos, com carga de 100 N e frequ?ncia de 1 Hz em m?quina de simula??o de fadiga. Resultados indicaram conformidade de adapta??o de fenda entre componentes variando de 70% a 90%. Quanto ? DH os dois grupos com componentes Switching (UC 3,6 e AC 3,6) apresentaram degrau negativo de 7,07 % e 5,36% respectivamente em rela??o a plataforma regular, enquanto os grupos de padr?o regular (UC 4,1 e AC 4,1) degrau negativo de 1,21% e 0 % (p?0,05). Em rela??o ? perda de torque ap?s a ciclagem foram obtidos os graus percentuais em cada grupo de 25% (UC 4,1), 39% (UC 3,6), 38% (AC 4,1) e 51% (AC 3,6), (p? 0,01). Desse modo, resultados do presente estudo indicam que os componentes com padr?o switching apresentam-se com comportamento biol?gico favor?vel de curto prazo de acordo com a literatura consultada, mas comportamento biomec?nico limitado. Em fator de adapta??o h? um grau de marcante precis?o em quase todas as amostras em termos de FV. A DH ? notada em maior ou menor grau, tanto em amostras regulares, quanto em padr?o switching. Observou-se que quanto maior o degrau negativo de discrep?ncia horizontal, maior ? o grau de perda de torque ap?s a ciclagem mec?nica. Foi observada tamb?m uma tend?ncia de que quanto mais marcada a aplica??o do conceito switching, maior a perda de torque associada.