Benefits of a snap-joint system in an immediate full-arch maxillary fixed rehabilitation on disparallel implants

Immediate implant-supported rehabilitation of atrophic maxillae with a fixed screw-retained prosthesis has to deal with the fixtures’ disparallelism and a high risk of fracture of the fixture-abutment connecting screw. After the flapless placement of six implants, with the distal ones inclined at more than 30° to bypass the sinus cavities and reduce the cantilever effects, the provisional prosthesis was immediately connected. The low-profile OT Equator attachment system enabled a trustworthy anchorage of the superstructure without the connection-screws allocation on the rear fixtures. Three months later, all implants were definitively loaded. The patient was monitored for two years follow-up. No problem arose during the whole treatment. The prosthesis maintained its stability and anchorage with complete functional and aesthetic results. No signs of periimplantitis or radiographically evident bone loss were noted. The OT Bridge system successfully simplified the immediate loading of all implants regardless of the inclination of the rear fixtures, avoiding a provisional mobile denture.