En junio de 2018 se propuso una nueva clasificación de enfermedades y condiciones periodontales y peri-im-plantares, en una reunión realizada conjuntamente por la Academia Americana de Periodoncia y la Federación Europea de Periodoncia, con el objetivo de actualizar la clasificación de 1999 en uso durante los últimos 19 años. El objetivo del artículo es introducir esta nueva clasificación para que tanto clínicos e investigadores pue-dan aplicarla. La nueva clasificación incorporará nuevos conceptos a medida que se reporten nuevos resultados sobre estudios que sean realizados en el futuro.

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ResumoObjetivo: Avaliar histomorfometricamente o efeito de biovidro (B), osso bovino liofilizado (OB) ou da mistura desses dois biomateriais (B/OB -1:1) no reparo de defeitos ósseos críticos em calvária de ratos. Material e método: Defeitos ósseos (8 mm Ø) foram criados cirurgicamente na calvária de 24 ratos, distribuídos em 4 grupos com 6 animais, de acordo com o tipo de biomaterial: coágulo sanguíneo (GC), biovidro (GB), osso bovino liofilizado (GOB) e a mistura desses dois biomateriais (GB/OB). Os animais foram eutanasiados após 15 e 60 dias do procedimento cirúrgico (3 animais por período). A avaliação histológica foi baseada na descrição da morfologia dos tecidos neoformados, enquanto para a avaliação histomorfométrica foi realizada quantificação da porcentagem de tecido ósseo, de tecido conjuntivo fibroso neoformados e de biomaterial remanescente no defeito ósseo. Resultado: Nos dois períodos experimentais, a análise histológica apresentou neoformação óssea, principalmente nas bordas dos defeitos, e ao redor de partículas de biomateriais remanescentes. A avaliação histomorfométrica demonstrou que no período de 15 dias o grupo GC apresentou maior percentagem de tecido ósseo em relação aos demais grupos estudados, enquanto que aos 60 dias o grupo GOB apresentou maior porcentagem de tecido ósseo em relação ao grupo GB. Conclusão: O osso bovino liofilizado apresentou maior formação óssea em relação ao biovidro, mas nenhum dos biomateriais foi superior ao coágulo. A associação do biovidro e osso bovino liofilizado não adicionou vantagem à formação óssea.Descritores: Histologia; osso; reparo ósseo. AbstractObjective: This study sought to histomorphometrically evaluate the effect of bioglass (B), lyophilized bovine bone (BB) or the 1:1 mixture of these two biomaterials on the repair of critical bone defects in rat calvaria. Material and method: Bone defects (8 mm Ø) were surgically created in the calvaria of 24 rats, which were divided into the following 4 groups of 6 animals each according to the type of biomaterial used: blood clot / coagulum (control) group (CG), bioglass group (BG), lyophilized bovine bone group (BBG) and a group receiving a mixture of these two biomaterials (BG/BB). The animals were euthanized at 15 or 60 days after surgery (3 animals per period). Histological evaluation was based on the morphological description of the newly formed tissues, and a quantification of the percentage of bone tissue with newly formed fibrous connective tissue and the percentage of biomaterial remaining in the bone defect was performed for the histomorphometric evaluation. Result: In both experimental periods, the histological analysis showed new bone formation, especially at the edges of the defects and around remaining biomaterial particles. Histomorphometric analysis showed that the CG contained a higher percentage of bone tissue over the 15-day period compared to that of the other groups. At 60 days, the BBG showed a higher percentage of bone tissue compared to that of the BG (p <0.01). Conclusion: Lyophilized...

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The aim of this article is to present a clinical case report where a female patient, 62 years old, presented with element 14 poorly positioned and mobility. The initial planning was immediate implantation with immediate provisionalization. The case described was carried out with a minimally invasive extraction, implant placement of the 3.75 x 11.5 mm (Helix, GrandMorse, Acqua, Neodent®, Brazil), immediate loading with a universal healing abutment (3.3 x 2.5 mm, Neodent®, Brazil) and a provisional cylinder of the universal healing abutment click (3.3 x 6.0 mm, Neodent®, Brasil) to approach of capture from a denture teeth and thus, the cementation of provisional implant crown. For modification of the gingival area, a subepithelial connective tissue graft was performed through the tunneling technique to improve peri-implant tissue conditioning. A 6-month postoperative follow-up was performed, showing satisfactory clinical and radiographic conditions during the most important phase of healing, and finally, a final follow-up of 12 months with the definitive cemented prosthesis. According to the literature and clinical experience, rehabilitation with immediate implant placement is one of the most challenging procedures when associated with immediate loading, where many criteria must be evaluated before the surgical phase, it means, and excellent initial planning.