Introduction: In the dental implant scenario, success rates are higher than 90.0% after five years of implantation, and about 85.0% after 10 years. The introduction of bone-integrated implants (IOS) was with Branemark in 1981. In this sense, there are platforms with HE and the with internal hexagon (HI). Objective: Therefore, the present study aimed to point out the main advantages and disadvantages of internal versus external hexagon implants. Methods: A total of 35 articles were found involving Implants. Internal Hexagon. External hexagon. Best match. Initially, it was held the exclusion existing title and duplications in accordance with the interest described this work. After this process, the summaries were evaluated and a new exclusion was held. The total of 18 articles was evaluated in full, and 15 were included and discussed in this study. Conclusion: The internal hexagon prosthetic connections are superior to those of the external hexagon because a deeper connection is created with greater contact of the abutment with the internal walls of the implant, reducing the possibility of micromovements.