title: Biological width around one- and two-piece implants retrieved from human jaws.
abstract: Several histologic studies regarding peri-implant soft tissues and biological width around dental implants have been done in animals. However, these findings in human peri-implant soft tissues are very scarce. Therefore, the aim of this case series was to compare the biological width around unloaded one- and two-piece implants retrieved from human jaws. Eight partially edentulous patients received 2 test implants in the posterior mandible: one-piece (solid implants that comprise implant and abutment in one piece) and two-piece (external hexagon with a healing abutment) implants. After 4 months of healing, the implants and surrounding tissue were removed for histologic analysis. The retrieved implants showed healthy peri-implant bone and exhibited early stages of maturation. Marginal bone loss, gaps, and fibrous tissue were not present around retrieved specimens. The biologic width dimension ranged between 2.55 ± 0.16 and 3.26 ± 0.15 to one- and two-piece implants, respectively (P < 0.05). This difference was influenced by the connective tissue attachment, while sulcus depth and epithelial junction presented the same dimension for both groups (P > 0.05). Within the limits of this study, it could be shown that two-piece implants resulted in the thickening of the connective tissue attachment, resulting in the increase of the biological width, when compared to one-piece implants.
authors: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Praca Tereza Cristina 229, 07023-070 Guarulhos, SP, Brazil.
authors: Ricardo
authors: R
authors: Judgar
authors: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Praca Tereza Cristina 229, 07023-070 Guarulhos, SP, Brazil.
authors: Gabriela
authors: 0000-0002-7590-8158
authors: G
authors: Giro
authors: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Praca Tereza Cristina 229, 07023-070 Guarulhos, SP, Brazil ; Department of Oral Implantology, Pucminas, Belo Horizonte, MG, Brazil.
authors: Elton
authors: E
authors: Zenobio
authors: Department of Biomaterials and Biomimetics, New York University, 45 E 24th Street, New York, NY 10010, USA.
authors: Paulo G
authors: PG
authors: Coelho
authors: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Praca Tereza Cristina 229, 07023-070 Guarulhos, SP, Brazil.
authors: Magda
authors: M
authors: Feres
authors: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Praca Tereza Cristina 229, 07023-070 Guarulhos, SP, Brazil.
authors: Jose A
authors: JA
authors: Rodrigues
authors: Department of Stomatology and Biotechnologies, University of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy.
authors: Carlo
authors: C
authors: Mangano
authors: Department of Stomatology and Biotechnologies, University of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy.
authors: Giovanna
authors: G
authors: Iezzi
authors: Department of Stomatology and Biotechnologies, University of Chieti-Pescara, Via dei Vestini 31, 66100 Chieti, Italy.
authors: Adriano
authors: A
authors: Piattelli
authors: Department of Periodontology and Oral Implantology, Dental Research Division, University of Guarulhos, Praca Tereza Cristina 229, 07023-070 Guarulhos, SP, Brazil.
authors: Jamil Awad
authors: JA
authors: Shibli
mesh_terms: D015921:Dental Implants; D020878:Device Removal; D005260:Female; D006801:Humans; D007568:Jaw / Q000000981:diagnostic imaging / Q000473:pathology*; D008297:Male; D008875:Middle Aged; D011859:Radiography
chemical_list: D015921:Dental Implants