2 research outputs found
Treatment of dehiscenceâtype defects with collagen matrix and/or enamel matrix derivative : histomorphometric study in minipigs
This study aimed to evaluate, histomorphometrically, the use of collagen matrix (CM) and/or enamel matrix derivative (EMD) for the treatment of dehiscenceâtype recession defects in minipigs.Eight healthy, male, young BRâ1 minipigs, with no periodontal disease were treated. Bilateral dehiscenceâtype 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 (splitâmouth 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 EMDâtreated 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 EMDâtreated 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 dehiscenceâtype defects in this animal model.FAPESP â Fundação de Amparo Ă Pesquisa Do Estado De SĂŁo Paulo2013 / 19473-
"Las cosas singulares de piedras, animales, plantas": la formaciĂłn y el funcionamiento de la red imperial española de remesas centĂficas en el Virreinato del RĂo de la Plata
El presente artĂculo acompaña el proceso de remesa de especĂmenes animales y vegetales de la regiĂłn administrativa del Virreinato del RĂo de la Plata para las instituciones cientĂficas españolas, tales como el Real Gabinete, el Real JardĂn BotĂĄnico y las menageries del Retiro y de Aranjuez. El propĂłsito fue intentar sorprender esas remesas en el exacto momento en que tales instituciones y sus redes de recolecciĂłn estaban siendo creadas, buscando expli- car las lĂłgicas que las presidĂan, en un momento en que se mezclaban propĂłsitos de orden econĂłmico; la cultura de la dĂĄdiva, tĂpica del Antiguo RĂ©gimen; con las modernas prĂĄcticas cientĂficas que estaban en construcciĂłn