Randomized Clinical Trial Comparing Different Implant Abutment Configurations in Fixed Partial Dentures for Replacing Missing Back Teeth

What this Trial Is About

Researchers are evaluating different implant abutment connection configurations in implant-supported screw-retained fixed dental prostheses. The study aims to compare clinical and radiographic outcomes to determine which abutment connection results in fewer biological and technical complications. This randomized controlled trial involves patients aged 18 years or older receiving dental implants for missing teeth in the posterior mandible. Participants will be randomly assigned to one of two groups one receiving a 3-unit screw-retained implant bridge supported by one hexed and one non-hexed abutment, and the other receiving a similar bridge supported by two non-hexed abutments. Both groups will receive two internal connection implants placed in healed sites with a minimum healing period of three months. The surgical procedure will follow standardized protocols, differing only by the abutment connection configuration. Participants will undergo clinical and radiographic evaluations at the time of definitive loading, six months after loading, and two years after loading. Researchers will measure changes in marginal bone levels as the primary outcome, with secondary outcomes including technical and mechanical complications, biological complications, and patient satisfaction. The study includes a one-year follow-up period for assessing these outcomes.

Comparison of Abutments Engagement Configurations in Implant Supported Fixed Partial Dentures