Oral bacterial colonization on dental implants restored with titanium or zirconia abutments: 6-month follow-up - Pereira, Alice Ramos de Freitas; Silva, Thalisson Saymo de Oliveira; Ribeiro, Ricardo Faria; Albuquerque Júnior, Rubens Ferreira de; Pedrazzi, Vinícius; Nascimento, Cássio do (Clinical Oral Investigations, 2018)