Objective:

To review the literature on the outcome of maxillary overdentures according to the number of dental implants in edentulous patients.

Materials and Methods:

A systematic bibliographic search was carried out in the Pubmed, Scopus and Web of Science search engines and, after appliying the criteria and filters, 6 articles were used. Of the 6 articles analyzed, 4 were randomized clinical trial type studies, 1 prospective study and 1 retrospective study.

Results:

The results of maxillary overdentures, according to the number of implants used to support them, and comparing the most widespread and researched protocols such as All-on-4 and All-on-6, were similar. They are considered optimal, reliable, successful and long-lived, with no significant difference within the number of dental implants placed.

Conclusions:

Maxillary overdentures supported by 4 or 6 implants were reliable, and exhibit comparable results. The complications were limited, and the results were optimal and enduring.