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Soft tissues around long‐term platform switching implant restorations: a histological human evaluation. Preliminary results
Author(s) -
Canullo Luigi,
Pellegrini Gaia,
Allievi Cristina,
Trombelli Leonardo,
Annibali Susanna,
Dellavia Claudia
Publication year - 2011
Publication title -
journal of clinical periodontology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.456
H-Index - 151
eISSN - 1600-051X
pISSN - 0303-6979
DOI - 10.1111/j.1600-051x.2010.01641.x
Subject(s) - soft tissue , implant , connective tissue , dentistry , medicine , resorption , peri , bone resorption , pathology , surgery
Canullo L, Pellegrini G, Allievi C, Trombelli L, Annibali S, Dellavia C: Soft tissues around long‐term platform switching implant restorations: a histological human evaluation. Preliminary results. J Clin Periodontol 2011; 38: 86–94. doi: 10.1111/j.1600-051X.2010.01641.x . Abstract Background: Switching platform restorations seems to reduce the peri‐implant bone resorption and to preserve the peri‐implant soft tissues. Aim: The aim of the present human study was to compare histologically the peri‐implant soft tissue in switching and traditional platform implants 4 years after restoration. Materials and Methods: Forty‐eight months after implant restoration, 37 peri‐implant soft tissue samples from 14 patients were harvested from traditionally restored implants (control group) and from three different platforms mismatching 0.25–0.85 mm (test groups). At the harvesting time, all sites were clinically healthy. Samples were processed to evaluate the inflammatory infiltrate area [inflamed connective tissue (ICT)], the microvascular density (MVD) and the collagen content (AA%). Results: At the analyses, no significant differences were found between groups in terms of ICT, MVD and AA% ( p >0.05). In all groups, most samples with a well‐preserved junctional epithelium showed a small and localized inflammatory infiltrated associated with not‐well‐oriented collagen fibres and an increased MVD. Conclusions: Forty‐eight months after restoration, switching and traditional platform implants had similar histological peri‐implant soft tissue features, despite different bone level changes detected radiographically and published in a previous parent study. The present study seems to confirm platform switching as a safe prosthetic concept leading to better maintenance of peri‐implant bone levels. However, further histological studies are required to longitudinally confirm the present data.