Introduction: Since the beginning of oral rehabilitation with dental implants, it has been observed the need to develop alternative connection types to meet different prosthetic needs. Prosthodontic rehabilitation of implants using either internal or external connection is widely used today. The selection of the type of connection depends of a number of clinical characteristics that most adapt to each clinical situation. The dentist's knowledge of the advantages and disadvantages of each one is fundamental in order to properly customize each treatment. Objectives: This study consists of a literature review, whose objective is to describe the differences between internal and external connections. The clinical advantages and disadvantages of each connection types will be adressed. Methods of searching: Research was conducted in the database PubMed/Medline recent literature on the subject, using the words "Dental Implants Connection"; "Prosthodontic Rehabilitation"; "Internal Connection"; "External Connection" and "Internal Connection vs External Connection". Results: 15 articles were selected. Conclusions The literature reveals that for both types of connection, there is a high predictability of success rates. Biomechanically, advantages and disadvantages are observed in both connections, however the need to develop different types of platforms are recommended. The choice should be made based on the type of rehabilitation in progress. Keywords: Dental implants connection, prosthodontic rehabilitation, internal connection, external connection, internal connection vs external connection