Longevity and marginal bone loss of narrow-diameter implants supporting single crowns: A systematic review

Autoři: Lucas Henrique Telles aff001;  Fernando Freitas Portella aff001;  Elken Gomes Rivaldo aff001
Působiště autorů: Programa de Pós-Graduação em Odontologia, Universidade Luterana do Brasil, Canoas, RS, Brazil aff001;  Universidade Feevale, Novo Hamburgo, RS, Brazil aff002
Vyšlo v časopise: PLoS ONE 14(11)
Kategorie: Research Article
prolekare.web.journal.doi_sk: 10.1371/journal.pone.0225046



To compare the longevity and marginal bone loss of narrow-diameter (≤3.3-mm) versus standard-diameter implants supporting single crowns.

Material and methods

The MEDLINE (via PubMed), Scopus, and SciELO databases were searched for relevant publications. In addition, the scientific references provided by each of the implant companies that appeared in the search were reviewed. Intervention studies comparing longevity and bone loss between narrow-diameter and standard-diameter implants were included.


The search was limited to in vivo studies in humans. The query returned 1931 results, of which 4 met the inclusion criteria. The implant success rate ranged from 93.8% to 100% over a maximum follow-up of 3 years, with no difference between narrow- and standard-diameter implants. Meta-analysis of all included studies showed greater bone loss in narrow-diameter implants as compared with standard ones; however, when analysis was restricted to randomized trials, no such difference was present.


The meta-analysis showed no difference in longevity between narrow implants and standard implants when supporting single crowns. However, narrow-diameter implants may be associated with greater marginal bone loss. These findings should be regarded cautiously due to the short follow-up duration and methodological heterogeneity of the primary studies.

Klíčová slova:

Systematic reviews – Medical implants – Database searching – Randomized controlled trials – Biomaterial implants – Titanium implants – Maxilla


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2019 Číslo 11