Os resultados deste estudo evidenciaram que a adaptação do pino ao conduto radicular influencia significativamente a retenção dos mesmos nos condutos radiculares. Quanto mais justa a adaptação dos pinos de fibra de vidro ao canal radicular, menor é a formação de gaps entre o cimento e as paredes do conduto radicular o que aumenta o prognóstico da retenção dos mesmos.
Infelizmente na ausência desta condição ideal, o uso de pinos anatômicos diretos e indiretos pode ser a primeira escolha do clínico para tratamento de canais excessivamente alargados. Estas técnicas apresentaram resultados semelhantes, em termos de resistência de união e resistência à fratura, ao do grupo que simulou adaptação ideal do pino ao conduto radicular.
No entanto, cabe salientar as limitações do presente estudo. Todos os procedimentos foram realizados por um único operador calibrado e com ampla experiência clínica e acadêmica. Assim, estudos que avaliem o efeito da experiência do operador e da variabilidade da técnica podem contribuir para o melhor entendimento do tema. Apesar de bem delineado, o estudo é laboratorial e somente ensaios clínicos randomizados podem fornecer evidências definitivas sobre a melhor técnica para uso clínico.
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ANEXO A
Aprovação do projeto pela Comissão de Ética em Pesquisa da Universidade Estadual de Ponta Grossa. COEP - UEPG