Acrylic Cement
Mostrando 13-24 de 30 artigos, teses e dissertações.
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13. Light-activation through indirect ceramic restorations: does the overexposure compensate for the attenuation in light intensity during resin cement polymerization?
OBJECTIVES: This study evaluated the effects of light exposure through simulated indirect ceramic restorations (SICR) on hardness (KHN) of dual-cured resin cements (RCs), immediately after light-activation and 24 h later. MATERIAL AND METHODS: Three dual-cured RCs were evaluated: Eco-Link (Ivoclar Vivadent), Rely X ARC (3M ESPE), and Panavia F (Kuraray Medic
Journal of Applied Oral Science. Publicado em: 2011-02
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14. Effect of the simulated periodontal ligament on cast post-and-core removal using an ultrasonic device
ABSTRACT OBJECTIVE: The aim of this study was to evaluate the effect of simulated periodontal ligament (SPDL) on custom cast dowel and core removal by ultrasonic vibration. MATERIAL AND METHODS: Thirty-two human maxillary canines were included in resin cylinders with or without SPDL made from polyether impression material. In order to allow tensile testing,
Journal of Applied Oral Science. Publicado em: 2010-10
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15. Cementos óseos acrílicos modificados con hidroxiapatita/acetato de vinilo: caracterización mecánica, termoanálitica y bioactividad in vitro
Bone cements have become biomaterials of great utility in the prosthesis fixation and as substitutes to the bone. The objective of this study is to evaluate the thermo analytical properties such as setting time and peak temperature of polymerization of acrylic bone cement modified with hydroxyapatite/vinyl acetate, to determine the compression strengths and
Polímeros. Publicado em: 07/05/2010
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16. Effect of fluoride-containing desensitizing agents on the bond strength of resin-based cements to dentin
OBJECTIVE: The objective of this study was to evaluate the effect of desensitizing agents containing different amounts of fluoride on the shear bond strength of a dual polymerized resin cement and a resin-modified glass ionomer cement (RMGIC) to dentin. MATERIAL AND METHODS: One hundred human molars were mounted in acrylic resin blocks and prepared until the
Journal of Applied Oral Science. Publicado em: 2009-10
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17. Influence of luting agents on time required for cast post removal by ultrasound: an in vitro study
OBJECTIVE: This in vitro study evaluated the influence of luting agents on ultrasonic vibration time for intraradicular cast post removal. MATERIAL AND METHODS: After endodontic treatment, 30 roots of extracted human canines were embedded in resin cylinders. The post-holes were prepared at 10 mm depth and their impressions were taken using autopolymerizing a
Journal of Applied Oral Science. Publicado em: 2009-06
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18. Comparison of the time required for removal of intraradicular cast posts using two Brazilian ultrasound devices
The aim of this in vitro study was to compare the time required for removal of intraradicular cast posts cemented with zinc phosphate (ZF) or glass ionomer cement (GIC), using two Brazilian ultrasound devices (BUD). Seventy two human inferior premolars with single root canals were sectioned transversally at the cementoenamel junction. In each specimen, the r
Brazilian Oral Research. Publicado em: 2009-03
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19. Estabilização de fraturas femorais e umerais de cães e gatos mediante pino intramedular e fixação paracortical com polimetilmetacrilato. / Stabilization of femoral and humeral fractures of dogs and cats by Intramedullary pin and paracortical fixation with polymethylmethacrylate.
Humeral and femoral fractures are frequent in the clinical routine of dogs and cats, and various methods of stabilization of the same, with their advantages and disadvantages are proposed in the literature. This study aimed to evaluate a new technique for stabilization of femoral and humeral fractures through use of intramedullary pin and paracortical fixing
Publicado em: 2008
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20. Study of behavior of dry set mortar modified with acrylic latex. / Estudo do comportamento de argamassas colantes com aditivação de látex acrílico.
Os revestimentos cerâmicos aderidos têm grandes vantagens estéticas e funcionais e seu emprego no mercado nacional vem sendo crescente, sobretudo com o uso de placas de porcelanato. Essas vantagens somente se concretizam com uma adequada durabilidade e vida útil, o que não vem ocorrendo com esses revestimentos aplicados em bases sujeitas a deformações
Publicado em: 2007
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21. Evaluation of the resistance to fracture of roots with cast metallic posts and fiber-glass posts at different working lengths, using the compression test / Avaliação da resistência à fratura de raízes portadoras de pinos metálicos fundidos e de fibra-de-vidro com diferentes comprimentos, por meio do teste de compressão
In this study, it was evaluated, in vitro, the resistance of fracture roots with glass-fiber and metallic intraradicular retainers with different lengths, using the compression test. Sixty caries-free superior canines had their crowns sectioned and radicular canals endodontically treated. The roots were embedded in acrylic resin, except for the 4 mm of cervi
Publicado em: 2007
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22. Thermogravimetric analyses and mineralogical study of polymer modified mortar with silica fume
Mineral and organic additions are often used in mortars to improve their properties. Microstructural investigation concerning the effects of styrene acrylic polymer and silica fume on the mineralogical composition of high-early-strength portland cement pastes after 28 days of hydration are presented in this paper. Thermogravimetry and derivative thermogravim
Materials Research. Publicado em: 2006-09
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23. Desempenho físico-químico de metais e estruturas de concreto de redes de distribuição de energia: estudo de caso na região de Manaus
The influence of natural aging furthered by atmospheric corrosion of parts of electric transformers and materials, as well as of concrete poles and cross arms containing corrosion inhibitors was evaluated in Manaus. Results for painted materials, it could showed that loss of specular gloss was more intensive in aliphatic polyurethane points than in acrylic p
Química Nova. Publicado em: 2006-07
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24. ESTUDO EXPERIMENTAL COMPARATIVO DOS CIMENTOS ÓSSEOS NACIONAIS / EXPERIMENTAL STUDY COMPARING NATIONAL BRANDS OF ORTHOPAEDICAL CEMENT
The bone or acrylic cement, also known for polymethylmethacrilate (PMMA), is a biomaterial used in surgeries. Used mainly in the fixation of prostheses, beyond the fulfilling and reconstruction of bone segments, the bone cement is placed in the empty spaces between the implant and the endosteal bone surface, hardening in little time and assuring the firm ran
Publicado em: 2006