Use of Narrow-Diameter Implants in the Posterior Jaw: A Systematic Review

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Statement of Problem:

Evidence is limited on the efficacy of narrow-diameter implants (NDIs) in the posterior jaw.


The purpose of this systematic review was to assess the survival of NDIs and provide guidelines for their safe use.

Materials and Methods:

Electronic search of the English-language literature enriched by hand search to identify suitable publications was made. Only peer-reviewed clinical studies published from January 1990 through March 2014 were included.


Seventeen studies with a total of 1644 implants met the inclusion criteria, with an observation period from 1 up to 12 years. The mean survival rate of 98.6% was reported. Technical and other complications were observed.


Short-term clinical data suggest that NDIs may serve in the posterior jaw as an alternative to standard-diameter implants. However, certain clinical conditions must be observed to assure long-term success.

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