2 research outputs found

    Treatment of dehiscence‐type defects with collagen matrix and/or enamel matrix derivative : histomorphometric study in minipigs

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    This study aimed to evaluate, histomorphometrically, the use of collagen matrix (CM) and/or enamel matrix derivative (EMD) for the treatment of dehiscence‐type recession defects in minipigs.Eight healthy, male, young BR‐1 minipigs, with no periodontal disease were treated. Bilateral dehiscence‐type defects were surgically created on the buccal of the mandibular premolars (PI and PII). After 30 days, the defects were randomly assigned to four groups: coronally advanced flap (CAF); CAF + CM; CAF + EMD; and CAF + CM + EMD (split‐mouth design). The evaluated parameters (mm): total defect length; new cementum (NC); new bone (NB); gingival margin position; total epithelium length; epithelium on the root; connective tissue adaptation; and soft tissue thickness (STT).The EMD‐treated groups showed a superior length of NC [4.13 ± 1.22 (CAF + EMD); 3.95 ± 1.11 (CAF + CM + EMD); 2.94 ± 0.77 (CAF + CM); 2.72 ± 0.81 (CAF), P = 0.02] and NB [3.21 ± 0.68 (CAF + CM + EMD); 3.01 ± 0.56 (CAF + EMD); 2.15 ± 0.47 (CAF + CM); 2.29 ± 0.82 (CAF), P = 0.005]. The CAF and CAF + CM groups showed a superior epithelial length when compared to EMD‐treated groups after 3 months. A superior STT was observed for CAF + CM + EMD group (1.5 ± 0.33) when compared with the other groups [1.09 ± 0.26 (CAF + EMD); 1.04 ± 0.34 (CAF + CM); and 1.14 ± 0.29 (CAF), P = 0.03].The results of the present study indicate that EMD application, irrespective of the combination with CM, may improve the periodontal regeneration of dehiscence‐type defects in this animal model.FAPESP – Fundação de Amparo Ă  Pesquisa Do Estado De SĂŁo Paulo2013 / 19473-

    "Las cosas singulares de piedras, animales, plantas": la formación y el funcionamiento de la red imperial española de remesas centíficas en el Virreinato del Río de la Plata

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    El presente artículo acompaña el proceso de remesa de especímenes animales y vegetales de la región administrativa del Virreinato del Río de la Plata para las instituciones científicas españolas, tales como el Real Gabinete, el Real Jardín Botånico y las menageries del Retiro y de Aranjuez. El propósito fue intentar sorprender esas remesas en el exacto momento en que tales instituciones y sus redes de recolección estaban siendo creadas, buscando expli- car las lógicas que las presidían, en un momento en que se mezclaban propósitos de orden económico; la cultura de la dådiva, típica del Antiguo Régimen; con las modernas pråcticas científicas que estaban en construcción
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