A 69-year-old woman consulted the Oral surgery and implantology unit of the Geneva University Hospitals with the chief complaint of chewing difficulties, aesthetic discomfort and dry mouth. The wish of the patient was to receive a reliable fixed solution in the long term. The patient had chronic nonspecific sialadenitis accompanied by xerostomia. She wore a total prosthesis stabilized on two inter-foraminal implants and had multiple cavities of the remaining maxillary teeth. The goals of treatment were to improve masticatory function with fixed prosthetic rehabilitation on upper and lower implants. With a post-extraction alveolar ridge preservation technique, the placement of Straumann® maxillary implants could be performed with a basic sequence without bone augmentation which reduced morbidity, treatment time and costs compared to reconstruction of the edentulous and atrophied mandible. The patient was very satisfied at the follow-up at 3 and 6 months as well as at 1 and 2 years, and the restorations were stable. In summary, the post-extraction preservation of the alveolar ridges is a predictable therapeutic option that can be considered in a context of multiple extraction in order to limit the complexity of the implant treatment.