Influence of abutment macro- and micro-geometry on morphologic and morphometric features of peri-implant connective tissue.
Clin Oral Implants Res
; 34(9): 920-933, 2023 Sep.
Article
em En
| MEDLINE
| ID: mdl-37345230
ABSTRACT
OBJECTIVES:
The aim of the present human observational study is to provide morphologic and morphometric analysis of peri-implant connective tissue next to abutments with divergent or convergent macro-geometry and different surface micro-characteristics. MATERIALS ANDMETHODS:
Thirty patients were rehabilitated with single implants in the posterior area and one out of three different healing abutments with a one-stage technique machined divergent abutment (DIV-MAC), machined convergent abutment (CONV-MAC) or convergent abutment with ultrathin threaded surface (CONV-UTM). At 3 months postimplant insertion, peri-implant soft tissue was harvested; the following outcomes were investigated histomorphometry (vertical width of connective and epithelial components) as detected by histology and polarized light; and connective tissue vertical width and 3D organization as detected by synchrotron-based high-resolution phase-contrast-based tomography (PhC-µCT).RESULTS:
Significant differences in connective tissue vertical dimension (aJE-AM) were found between DIV-MAC and both CONV-MAC and CONV-UTM, both by histology and PhC-µCT, with significantly higher values for the last two groups. Moreover, 2D histological analysis did not find significant differences in the junctional epithelium vertical dimension (PM-aJE). Importantly, PhC-µCT analysis revealed, at 3D level, significant greater amount and density of collagen bundles for CONV-UTM compared with the other two groups.CONCLUSIONS:
Convergent abutment profiles, regardless of their surface micro-geometry, seem to favor axial development of peri-implant connective tissue. Moreover, ultrathin threaded surfaces seem associated with denser and greater connective tissue organization, which might improve peri-implant soft tissue seal.Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Dente
/
Implantes Dentários
Tipo de estudo:
Observational_studies
Limite:
Humans
Idioma:
En
Revista:
Clin Oral Implants Res
Assunto da revista:
ODONTOLOGIA
Ano de publicação:
2023
Tipo de documento:
Article
País de afiliação:
Itália