The objective of this study is to evaluate the osteoconductivity and bioactivity of the Bonelike Õ graft in repairing surgical cystic bone defects. Bonelike Õ is implanted in 11 patients, aged between 24 and 53 years with a mean age of 36 years, consisting of 5 men and 6 women. According to the standard follow up protocols, radiological examinations are performed and Bonelike Õ /bone retrieved samples have been analyzed histologically using nondecalcified sections obtained perpendicular to bone length axis. Radiographic examination and histological results clearly demonstrate an extensive new bone formation apposed on Bonelike Õ granules with a significant degree of maturation. These clinical applications in maxillary bone defects indicate perfect bone bonding between new bone formed and Bonelike Õ granules, along with partial surface biodegradation. This quick and effective osteoconductive response from Bonelike Õ may reduce the time needed to reconstruct the bone defected area of patients.
A argila utilizada por artesãos de Icoaraci-Pa apresenta em sua composição 60 % de SiO2, 19,13% de Al2O3 e 6,4% de Fe2O3 e outros componentes como CaO, TiO2, MgO e K2O. O excesso de sílica contribui com defeitos no produto final. Realizou-se operação de peneiramento e verificou-se que no passante da malha 100 houve redução de sílica. Avaliou-se uma formulação de esmalte que atendesse as características da argila. A melhor composição do esmalte foi obtida com 18% de bórax, 78,13% de frita, 1,56% de argila, 0,75 ml de CMC e 0,5ml de solução água cola 10:1. Estas proporções possibilitam adequar o coeficiente de dilatação do material cerâmico ao da frita, proporcionando a esmaltação em temperatura de bi queima de 1020 ºC, sendo que a primeira queima do material cerâmico sem esmalte ocorre a 1100 ºC. Com esta composição as peças apresentaram maior uniformidade, menor porosidade e melhor aspecto visual, com camada vítrea.
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