Navegando por Palavras-chave "Biocompatible Materials"
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- ItemAcesso aberto (Open Access)Comparação dos efeitos do laser de baixa potência e do ultrassom de baixa intensidade associado ao Biosilicato® no processo de reparo ósseo em tíbias de ratos(Sociedade Brasileira de Ortopedia e Traumatologia, 2012-02-01) Oliveira, Poliani de; Fernandes, Kelly Rossetti [UNIFESP]; Sperandio, Evandro Fornias [UNIFESP]; Pastor, Fabio Alexandre Casarin; Nonaka, Keico Okino; Parizotto, Nivaldo Antonio; Renno, Ana Claudia Muniz [UNIFESP]; Universidade Federal de São Carlos; Universidade Federal de São Paulo (UNIFESP)OBJECTIVE: Verify the effects of the association between Biosilicate® and ultrasound and, Biosilicate® and laser in bone consolidation process of rats, through the biomechanical and histological analysis. METHODS: Forthy male rats were used. The animals were randomized into four groups (n=10): control group fracture no treated (CGF); group treated with Biosilicate® (BG); group treated with Biosilicate® and laser (BLG); group treated with Biosilicate® and ultrasound (BUG). RESULTS: The biomechanical analysis showed no significant difference among any groups after 14 days post-surgery. In the morphometric analysis, the control group showed moderate presence of new formed bone tissue inside the defects areas and the Biosilicate® group showed similar results. Despite those facts, the biomaterial osteogenic potential was demonstrated by the great amount of cells and bone tissue around the particles. Curiously, the Biosilicate® plus laser or ultrasound groups showed lower amounts of bone tissue deposition when compared with control fracture and Biosilicate® groups. CONCLUSION: The data from this study can conclude that Biosilicate® was able to accelerate and optimized the bone consolidation, through the modulation of the inflammatory process and the stimulation of new bone formation. However, when resources were associated, there are no positive results.
- ItemAcesso aberto (Open Access)Portland cement versus MTA as a root-end filling material. A pilot study(Acta Cirurgica Brasileira, 2015-02-01) Silva, Sergio Ribeiro da; Silva Neto, Jose Dias da [UNIFESP]; Veiga, Daniela Francescato [UNIFESP]; Schnaider, Taylor Brandao; Ferreira, Lydia Masako [UNIFESP]; Univ Vale Sapucai UNIVAS; Univ Vale Sapucai; Universidade Federal de São Paulo (UNIFESP); IA CNPqPURPOSE To assess periradicular lesions clinically and by computed tomography (CT) after endodontic surgery using either Portland cement or mineral trioxide aggregate (MTA) as a root-end filling material.METHODS: Three patients diagnosed with periradicular lesions by cone-beam CT underwent endodontic surgery with root-end filling. Patient A was treated with MTA as the root-end filling material, patient B was treated with Portland cement and patient C had two teeth treated, one with MTA and the other with Portland cement. Six months after surgery, the patients were assessed clinically and by CT scan and the obtained results were compared.RESULTS: Periradicular tissue regeneration was observed in all cases, with no significant differences in bone formation when comparing the use of MTA and Portland cement as root-end filling materials.CONCLUSION: Both mineral trioxide aggregate and Portland cement were successful in the treatment of periradicular lesions.
- ItemAcesso aberto (Open Access)Portland cement with additives in the repair of furcation perforations in dogs(Sociedade Brasileira para o Desenvolvimento da Pesquisa em Cirurgia, 2012-11-01) Silva Neto, José Dias da [UNIFESP]; Schnaider, Taylor Brandão; Gragnani, Alfredo [UNIFESP]; Paiva, Anderson Paulo de; Novo, Neil Ferreira [UNIFESP]; Ferreira, Lydia Masako [UNIFESP]; UNIVAS Department of Clinical Medicine; Universidade Federal de São Paulo (UNIFESP)PURPOSE: To evaluate the use of Portland cements with additives as furcation perforation repair materials and assess their biocompatibility. METHODS: The four maxillary and mandibular premolars of ten male mongrel dogs (1-1.5 years old, weighing 10-15 kg) received endodontic treatment (n=80 teeth). The furcations were perforated with a round diamond bur (1016 HL). The perforations involved the dentin, cementum, periodontal ligament, and alveolar bone. A calcium sulfate barrier was placed into the perforated bone to prevent extrusion of obturation material into the periradicular space. The obturation materials MTA (control), white, Type II, and Type V Portland cements were randomly allocated to the teeth. Treated teeth were restored with composite resin. After 120 days, the animals were sacrificed and samples containing the teeth were collected and prepared for histological analysis. RESULTS: There were no significant differences in the amount of newly formed bone between teeth treated with the different obturation materials (p=0.879). CONCLUSION: Biomineralization occurred for all obturation materials tested, suggesting that these materials have similar biocompatibility.
- ItemSomente MetadadadosRoot perforations treatment using mineral trioxide aggregate and Portland cements(Acta Cirurgica Brasileira, 2010-11-01) Silva Neto, Jose Dias da [UNIFESP]; Brito, Rafael Horacio de; Schnaider, Taylor Brandao; Gragnani, Alfredo [UNIFESP]; Engelman, Miriam de Fatima Brasil [UNIFESP]; Ferreira, Lydia Masako [UNIFESP]; Universidade Federal de São Paulo (UNIFESP); Univ Vale SapucaiPurpose: Clinical, radiological and histological evaluation of root perforations treated with mineral trioxide aggregate (MTA) or Portland cements, and calcium sulfate barrier. Methods: One molar and 11 premolar teeth of a male mongrel dog received endodontic treatment and furcations were perforated with a high-speed round bur and treated with a calcium sulfate barrier. MTA, Portland cement type II (PCII) and type V (PCV), and white Portland cement (WPC) were used as obturation materials. The teeth were restored with composite resin and periapical radiographs were taken. The animal was euthanized 120 days post-surgery for treatment evaluation. Results: Right lower first premolar (MTA), right lower third premolar (PCV), left lower second premolar (MTA), and right lower second premolar (WPC): clinically normal, slightly radio-transparent area on the furcation, little inflammatory infiltrate, and new-bone formation. Left lower third premolar (PCII), right upper first premolar (WPC), right upper third premolar (PCII), and left upper first molar (PCV): clinically normal, radiopaque area on the furcation, and new-bone formation. Right upper second premolar (MTA), left upper second premolar (WPC), left upper third premolar (PCII): presence of furcation lesion, large radiolucent area, and intense inflammatory infiltrate. Conclusion: All obturation materials used in this study induced new-bone formation.