This retrospective cohort study was submitted and approved by the Hospital Research Ethics Committee, receiving the registration number 137/201.

The sample consisted of 28 patients (21 females and 7 males), with age ranging from 46 to 63 years, and all of them have undergone either the placement of zygomatic implants using the Stella and Warner’s technique or conventional implants, in the period from 2007 to 2014 at the Oral-Maxillofacial Surgery and Traumatology Sector of the Onofre Lopes University Hospital. The patients were divided into two groups: group I comprised 14 patients who underwent surgery for installation of zygomatic implants by the Stella and Warner’s technique, rehabilitated with implant-supported fixed dentures, and group II consisting of 14 patients who were rehabilitated with total implant-supported fixed prosthesis, using conventional implants only, without the need of zygomatic implants. All patients were rehabilitated with Conexão® implants system.

The inclusion criteria for group I were patients with severe maxillary resorption, classified as classes IV and V of Cawood and Howell (1988), receiving zygomatic implants using Stella and Warner’s technique, performed by the Oral and Maxillofacial Surgery Department from the Rio Grande do Norte Federal University, and having full implant-supported fixed prosthesis with at least one zygomatic implant under functional loading for at least 6 months. For the group II, individuals rehabilitated with full fixed implant-supported prosthesis without the presence of zygomatic implants, without reconstructive surgeries, and also on functional loading for at least 6 months were included. The healing time for all zygomatic implants was, at least, 6 months.

The evaluation was performed in four stages: the first was characterized by a radiographic analysis of implants in group I, the second was a clinical evaluation of implants placed in group I, the third was an evaluation of the maxillary sinus health in group I, and the fourth consisted of an application of a questionnaire to assess the degree of satisfaction of the prosthetic rehabilitation in groups I and II. The aim of this study was to evaluate the success rate of zygomatic implants using Stella and Warner’s technique, investigating the survival rate, sinus disease, and the satisfaction of patients rehabilitated with full fixed prostheses with zygomatic implants.