Soft tissues around long-term platform switching implant restorations: a histological human evaluation. Preliminary results

被引:47
作者
Canullo, Luigi
Pellegrini, Gaia [1 ]
Allievi, Cristina [1 ]
Trombelli, Leonardo [2 ]
Annibali, Susanna [3 ]
Dellavia, Claudia [1 ]
机构
[1] Univ Milan, Dept Human Morphol & Biomed Sci Citta Studi, Milan, Italy
[2] Univ Ferrara, Dept Periodontol, I-44100 Ferrara, Italy
[3] Univ Roma La Sapienza, Dept Oral Sci, Rome, Italy
关键词
dental implants; histologic analysis; immunohistochemistry; peri-implant soft tissues; platform switching; CRESTAL BONE CHANGES; ENDOTHELIAL GROWTH-FACTOR; TITANIUM IMPLANTS; MICROVESSEL DENSITY; SUBMERGED IMPLANTS; COLLAGEN; HEALTHY; METALLOPROTEINASES; ORGANIZATION; EXPRESSION;
D O I
10.1111/j.1600-051X.2010.01641.x
中图分类号
R78 [口腔科学];
学科分类号
1003 ;
摘要
P>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.
引用
收藏
页码:86 / 94
页数:9
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