Estudo de implantes de Ticp com superfícies modificadas por feixe de laser com e sem deposição química de apatitas: análises topográfica, biomecânica e histométrica em coelhos
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Data
2010-04-16
Autores
Queiroz, Thallita Pereira [UNESP]
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
O sucesso da reabilitação com implantes osseointegráveis é dependente de vários fatores, destacando-se as propriedades físico-químicas da superfície, que interferem nas respostas biológicas e conseqüente reparo ósseo da interface osso/implante. O propósito deste estudo foi avaliar as superfícies de implantes de titânio comercialmente puro (Ticp) modificadas por feixe de laser (SL) sem e com deposição de hidroxiapatita pelo método biomimético, sem (SHAST) e com tratamento térmico (SHACT), comparando-as com implantes de superfície modificada por tratamento ácido (SA) e com superfície usinada (SU), empregando-se análises topográfica, biomecânica e histométrica. Quarenta e cinco coelhos receberam 150 implantes, sendo 2 implantes de cada superfície por tíbia. Após 30, 60 e 90 dias, os animais foram submetidos à eutanásia e os implantes localizados superiormente foram expostos, removidos por torque-reverso para análise biomecânica e as superfícies foram analisadas topograficamente. O implante localizado mais inferiormente em cada tíbia foi removido com o tecido ósseo ao redor e processado para obtenção de cortes histológicos não-descalcificados para análise histométrica da extensão linear de contato osso/implante (ELCOI) e da área óssea (AO) entre as espiras da região cortical superior. Aos 30 e 60 dias, os grupos SL, SHAST, SHACT e SA apresentaram valores de torque-reverso estatisticamente superiores (p<0,05) ao torque de SU. Aos 30 dias, os grupos SHAST e SHACT foram estatisticamente superiores ao grupo SA e o grupo SHAST foi superior ao SL. Aos 90 dias a diferença foi observada somente entre SHAST e SU. A análise topográfica revelou diferença estatística significante (p<0,05) entre a rugosidade de SL, SHAST e SHABT quando comparadas com SA e SU. A análise histométrica da ELCOI mostrou...
The success of rehabilitation with dental implants is dependent on several factors, highlighting the physical and chemical properties of the implant surface, which interfere with the biological responses and subsequent bone repair of bone-implant interface. The purpose of this study was to evaluate the surfaces of implants of commercially pure titanium (cp Ti) modified by laser beam (LS) with and without hydroxyapatite deposition by the biomimetic method, without (HAB) and with thermal treatment (HABT) comparing them with implants surface modified by treatment with acid (AS) and machined surface (MS), employing topographical, biomechanics and histometric analysis. Forty-five rabbits received 150 implants (2 implants of each surface in each tibia). After 30, 60 and 90 days, the animals were euthanized and the implants superiorly located were exposed, removed by removal torque for biomechanical analysis and the surfaces were examined topographically. The implant located more inferiorly in each tibia was removed with the bone tissue around and it was processed to obtain non-decalcified histological sections for histometric analysis of the percentage of bone-implant contact (BIC) and bone area (BA) between the threads of higher cortical. At 30 and 60 days, the groups LS, HAB, HABT and AS obtained removal torque values statistically superior (p <0.05) than the removal torque of MS. At 30 days, the HAB and HABT groups were statistically superior to the AS group and HAB was higher than LS. At 90 days, HAB was statistically significant different from MS. The topographical analysis showed statistically significant difference (p <0.05) between the roughness of LS, HAB and HABT when compared with AS and MS. The histometric analysis of BIC showed that LS, HAB and HABT were statistically superior to the AS and MS, in three... (Complete abstract click electronic access below)
The success of rehabilitation with dental implants is dependent on several factors, highlighting the physical and chemical properties of the implant surface, which interfere with the biological responses and subsequent bone repair of bone-implant interface. The purpose of this study was to evaluate the surfaces of implants of commercially pure titanium (cp Ti) modified by laser beam (LS) with and without hydroxyapatite deposition by the biomimetic method, without (HAB) and with thermal treatment (HABT) comparing them with implants surface modified by treatment with acid (AS) and machined surface (MS), employing topographical, biomechanics and histometric analysis. Forty-five rabbits received 150 implants (2 implants of each surface in each tibia). After 30, 60 and 90 days, the animals were euthanized and the implants superiorly located were exposed, removed by removal torque for biomechanical analysis and the surfaces were examined topographically. The implant located more inferiorly in each tibia was removed with the bone tissue around and it was processed to obtain non-decalcified histological sections for histometric analysis of the percentage of bone-implant contact (BIC) and bone area (BA) between the threads of higher cortical. At 30 and 60 days, the groups LS, HAB, HABT and AS obtained removal torque values statistically superior (p <0.05) than the removal torque of MS. At 30 days, the HAB and HABT groups were statistically superior to the AS group and HAB was higher than LS. At 90 days, HAB was statistically significant different from MS. The topographical analysis showed statistically significant difference (p <0.05) between the roughness of LS, HAB and HABT when compared with AS and MS. The histometric analysis of BIC showed that LS, HAB and HABT were statistically superior to the AS and MS, in three... (Complete abstract click electronic access below)
Descrição
Palavras-chave
Implantes dentários, Torque, Lasers, Propriedades de superfície, Durapatita, Dental implants, Surface properties, Durapatite
Como citar
QUEIROZ, Thallita Pereira. Estudo de implantes de Ticp com superfícies modificadas por feixe de laser com e sem deposição química de apatitas: análises topográfica, biomecânica e histométrica em coelhos. 2010. 150 f. Tese (doutorado) - Universidade Estadual Paulista, Faculdade de Odontologia de Araçatuba, 2010.