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. 2019 Sep 1;24(5):e673-e683.
doi: 10.4317/medoral.23006.

Impact of crestal and subcrestal implant placement upon changes in marginal peri-implant bone level. A systematic review

H Pellicer-Chover  1 , M Díaz-Sanchez, D Soto-Peñaloza, M-A Peñarrocha-Diago, L Canullo, D Peñarrocha-Oltra
Affiliations

Impact of crestal and subcrestal implant placement upon changes in marginal peri-implant bone level. A systematic review

H Pellicer-Chover et al. Med Oral Patol Oral Cir Bucal. .

Abstract

Background: To systematically assess studies analyzing peri-implant bone loss in implants placed in crestal and subcrestal position.

Material and methods: Following the recommended methods for systematic reviews and meta-analyses (PRISMA), an electronic search was conducted in the PubMed (MEDLINE), EMBASE and LILACS databases to identify all relevant articles published up until April 2017. The search included human studies comparing marginal bone loss (MBL) between a control group and a study group with a minimum of 10 patients and a minimum follow-up of 6 months after prosthetic loading with rough neck implants. Two independent reviewers assessed the risk of bias in the selected studies based on the Newcastle-Ottawa scale for observational studies and the Cochrane Collaboration for clinical trials.

Results: Of 342 potentially eligible items, 7 complied with the inclusion criteria. One article was retrieved through the manual search. Eight articles were finally included: five experimental and three observational studies. The risk of bias assessed by the Cochrane Collaboration and Newcastle-Ottawa showed a high risk of bias. The mean follow-up period was 21 months (range 6-36 months). In four studies, implants placed in a crestal position presented higher MBL than subcrestal implants - the differences being significant in one study, while in three studies, implants placed in a subcrestal position presented greater MBL than crestal implants, with significant differences in only one study.

Conclusion: Despite its limitations, the present systematic review did not find better outcomes between crestal and subcrestal implant placement, however, new studies will be needed, involving improved designs and the standardization of protocols to allow statistical comparisons and the drawing of firm conclusions.

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Conflict of interest statement

Conflict of interest statement:The authors declare that they have no conflicts of interest in relation to this study, and received no financial support of any kind to carry out the present review.

Figures

Figure 1
Figure 1
PRISMA flowchart of searching and selection process of titles during systematic review.
Figure 2
Figure 2
Summary of the risk of bias on the trial studies included in the systematic review according to the Cochrane Collaboration’s Tool. Low risk of bias (green); high risk of bias (red).
See this image and copyright information in PMC

References

    1. Albrektsson T, Zarb G, Worthington P, Eriksson AR. The long-term efficacy of currently used dental implants: a review and proposed criteria of success. Int J Oral Maxillofac Implants. 1986;1:11–25. - PubMed
    1. Roos-Jansaker AM, Lindahl C, Renvert H, Renvert S. Nine-to fourteen-year follow-up of implant treatment. Part II: presence of peri-implant lesions. J Clin Periodontol 2006;33:290–5. - PubMed
    1. Jemt T, Lekholm U. Single implants and buccal bone grafts in the anterior maxilla: measurements of buccal crestal contours in a 6-year prospective clinical study. Clinical Implant Dentistry and Related Research. 2005;7:127–35. - PubMed
    1. Linkevicius T, Apse P, Grybauskas S, Puisys A. Th influence of soft tissue thickness on crestal bone changes around implants: a 1-year prospective controlled clinical trial. Int J Oral Maxillofac Implants. 2009;24:712–19. - PubMed
    1. Rodríguez-Ciurana X, Vela-Nebot X, Segalà-Torres M, Calvo-Guirado JL, Camba J, Méndez-Blando V. The effect of interimplant distance on the height of the interimplant bone crest when using platform-switched implants. Int J Periodontics Restorative Dent. 2009;29:141–51. - PubMed

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