Peri-implant Tissues on the Galimplant Anti-rotational Slim Abutment.

Inclusion Criteria: * Patients who meet all the inclusion criteria and none of the exclusion criteria will be informed verbally and in writing about the study and will sign the informed consent form provided for their participation. * Systemic conditions favorable for the performance of oral surgical procedures (ASA I/II). * Not to be completely edentulous * Bilateral absence of at least two teeth (one per hemimaxillary) in the posterior area (from the first premolar to the second molar) with or without free distal ends. * That do not require regenerative techniques * That allow the placement of Galimplant implants of 4.5 or 5 mm in diameter in edentulous areas with mature bone of at least 3 months healing time * With a prosthetic space of at least 8 mm. * In case of odd absences, a slim abutment will be placed, being the group to be tested always in the majority. Exclusion Criteria: * Presence of any disease, condition or medication that may compromise the healing and/or osseointegration of dental implants (uncontrolled diabetes mellitus, immunosuppression, administration of bone modifying agents (BMA). Presence of any severe mental disorder, and patients who have received head and neck radiotherapy during the previous 18 months. * Patients who do not have sufficient peri-implant keratinized gingiva to allow at least 1 mm of residual gingiva after excision of the tissue under study. * Esthetic edentulous areas of 13-23, Implants with primary stability with ISQ \< 50 or \<…