Introdução: Os diastemas são espaços interdentais que ocorrem nos arcos superior e inferior, tanto em dentes anteriores como em dentes posteriores, sendo mais frequentes em dentes anterossuperiores. Sua etiologia é multifatorial e deve ser avaliada com cautela para que o tratamento correto seja realizado e concluído com sucesso. Objetivo: Dessa maneira, o presente artigo possui como objetivo relatar um caso clínico em que se optou pela confecção de facetas em resina composta direta para o fechamento dos diastemas. Caso clínico: Paciente de 21 anos, procurou atendimento no curso de graduação em Odontologia da Universidade Nilton Lins queixando-se do espaço que havia entre seus incisivos superiores. Após exame clínico foi sugerida a confecção de facetas em resina composta pela técnica direta. Conclusão: Por meio deste caso clínico conclui-se que a realização de facetas utilizando materiais adesivos se destaca por reduzido tempo de trabalho e baixo custo. Mostrando ser uma técnica eficaz no restabelecimento dos aspectos funcionais e estéticos do sorriso.
The aim of the present study is to evaluate the peri-implant soft tissues and the amount of inflammatory cells around two different implant-abutment connections (self-locking conical connection with platform switching and screwed connection with standard abutment and internal anti-rotational system). Histological analysis was made of 14 implants, 7 with self-locking Morse tapered connection (experimental group A) and 7 with screw-retained anti-rotational connection (control group B). Sixty days after non-functional immediate loading, peri-implant tissue biopsies were performed. In the samples taken from the experimental group the peri-implant connective tissue consisted of a greater density of collagen and fibroblasts compared to the connective tissue of the control group. The experimental group specimens showed less inflammatory infiltrate close to the self-locking tapered connection compared to the tissues around the screw-retained connection. The SEM observations showed less microgap in the self-locking conical connection than in the screw connections with standard abutment and internal anti-rotational system. The presence of connective tissue with few inflammatory cells and the absence of inflammatory infiltrate, in self-locking conical connection implants is due to the minimal size of the implant-abutment microgap that does not allow the passage of fluids and bacteria from the oral cavity to the implant thus preventing tissue inflammation.
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