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J Clin Periodontol. 2010 Jan;37(1):98-110. doi: 10.1111/j.1600-051X.2009.01493.x. Epub 2009 Dec 7.

A systematic review of implant-supported maxillary overdentures after a mean observation period of at least 1 year.

Author information

1
Department of Prosthetic Dentistry, Dental School, University Medical Center Groningen, Groningen, The Netherlands. j.w.a.slot@med.umcg.nl

Abstract

AIM:

The aim of the present systematic review of implant-supported maxillary overdentures was to assess the survival of implants, survival of maxillary overdentures and the condition of surrounding hard and soft tissues after a mean observation period of at least 1 year.

MATERIAL AND METHODS:

MEDLINE (1950-August 2009), EMBASE (1966-August 2009) and CENTRAL (1800-August 2009) were searched to identify eligible studies. Two reviewers independently assessed the articles.

RESULTS:

Out of 147 primarily selected articles, 31 studies fulfilled the inclusion criteria. A meta-analysis showed an implant survival rate (SR) of 98.2% per year in case of six implants and a bar anchorage. In case of four implants and a bar anchorage, the implant SR was 96.3% per person. In case of four implants and a ball anchorage, the implant SR was 95.2% per year.

CONCLUSION:

In all three treatment options, the SR of the implants is more than 95%. The studies included reveal that a maxillary overdenture supported by six dental implants, which are connected with a bar, is the most successful treatment regarding survival of both the implants and overdenture. Second in line is the treatment option with four implants and a bar. The treatment option with four or less implants and a ball attachment system is the least successful.

[Indexed for MEDLINE]

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