The goal of this prospective study is to assess short term (12-months) clinical outcomes of NobelZygoma TiUltra implants and Multi-unit Abutment Xeal in the rehabilitation of participants with severely atrophic maxilla treated with zygomatic dental implant procedure. The main goal is to assess the sinusitis occurrence at 12-months after implant insertion. Other objectives are to assess: soft tissue health; biological and technical complication; patient's experience, outcomes (sinonasal symptoms and oral health-related quality of life) and satisfaction; clinician's experience with handling of device and satisfaction; implant, abutment and prosthetic survival and adverse events.
Participants will be asked to complete questionnaires at pretreatment visit, postoperative visit, and after 6-months and 12-months of implant insertion. At 12-months a radiological exam (CBCT) will be asked for the participant for the evaluation of the radiological condition of the maxillary sinus.