5-year outcome of cross-arch prostheses supported by four immediately loaded zygomatic implants: A prospective case series.

PURPOSE: To evaluate the clinical outcome of maxillary prostheses supported by four immediately loaded zygomatic implants in the rehabilitation of edentulous patients with severe atrophic maxillae after 5 years of function. MATERIALS AND METHODS: Out of a total of 17 consecutive patients with severe atrophy in the maxillae (Cawood and Howell classification C-VI and D-V or D-VI) and whom were rehabilitated using four immediately loaded zygomatic implants, three were lost during follow-up. Outcome measures were success rates of the prostheses, success rates of the zygomatic implants, complications and oral health-related quality of life (OHIP-14 questionnaire). RESULTS: In 14 patients assessed at 5 years after operation, no prosthesis or zygomatic implants failed, although one implant placed in an unfavourable position was not used. Fifty percent of the patients had complications, which included penetration of the orbital cavity during the drilling procedure (1 patient), infection followed by a fistula at one zygomatic implant (1 patient), sinusitis (2 patients), fracture of the abutment screw (1 patient) and fracture of the prostheses (2 patients). All complications were resolved without clinical consequences. At 5 years the mean score of the OHIP-14 was 3.8, which is similar to that of the general population. CONCLUSION: Results at 5 years indicate that the use of four immediately loaded zygomatic implants is a reliable approach for successful rehabilitation of edentulous patients with severely atrophied maxillae.

Prostheses supported by four immediately loaded zygomatic implants: a 3-year prospective study.

PURPOSE: To assess the clinical 3-year outcome of prostheses supported by four immediately loaded zygomatic implants. MATERIALS AND METHODS: A total of 17 consecutively treated patients (7 men, 10 women, mean age 57.7 years) with severe maxillary atrophy were immediately rehabilitated with prostheses supported by four immediately loaded zygomatic implants. The patients were followed up for 3 years and the outcome measures included success rates of the prostheses, success rates of the zygomatic implants, complications and oral-health related quality of life (OHRQoL). RESULTS: No patients dropped out. No prosthesis or zygomatic implants failed, though one implant was not used to support the final prosthesis because it emerged in an unfavourable position. Seven complications occurred: penetration of the orbital cavity during the drilling procedure with no relevant consequences; an infection followed by a fistula at one zygomatic implant, which was resolved with antibiotic treatment and surgical drainage; two patients developed sinusitis, and were successfully treated with antibiotics and meatotomy; fracture of the abutment screw occurred in one patient; and fracture of the prosthesis occurred in two patients and the definitive prostheses were repaired. The average score for the OHIP-14 questionnaire was 2.7, which was similar to that of the general population. CONCLUSIONS: The present 3-year study suggests that prostheses supported by four immediately loaded zygomatic implants can be used for successful rehabilitation of patients with severely atrophic maxillae.

Immediately loaded zygomatic implants: a 5-year prospective study.

PURPOSE: This prospective study was designed to assess the long-term outcome of immediately loaded zygomatic implants placed in atrophic maxillae. MATERIALS AND METHODS: Forty-two consecutively treated patients received 81 zygomatic implants and 140 conventional implants for oral rehabilitation and were followed for 5 years. Complete arch rehabilitation was accomplished in 37 patients and partial arch rehabilitation in 5 (one zygomatic implant in combination with two conventional implants). Outcome measures were prosthetic and implant failures, and complications. RESULTS: Twelve zygomatic and 22 conventional implants in 6 patients were not reviewed as patients were lost to follow-up. One zygomatic implant was removed at the 3-year follow-up visit because of lack of osseointegration and disturbances around the zygomatic region. The success rate of zygomatic implants was 98.5% (68/69). Six conventional implants were lost, with a success rate of 94.9% (112/118). One of the definitive prostheses was changed after 4 years of follow-up. Six complications occurred during the entire follow-up period. CONCLUSIONS: The 5-year prognosis was found to be good for immediately loaded zygomatic implants together with conventional implants in severely resorbed maxillae.

Immediate function of four zygomatic implants: a 1-year report of a prospective study.

PURPOSE: To evaluate the clinical outcome of maxillary prostheses supported by four immediately loaded zygomatic implants after 1 year of function. MATERIALS AND METHODS: Seventeen patients were consecutively included and followed up to 1 year after prosthetic loading. Patients had severely atrophic maxillae (Cawood and Howell classification C-VI and D-V or D-VI) and were rehabilitated using four immediately loaded zygomatic implants, two in each zygoma bone. Outcome measures were success rates of the prostheses, of the zygomatic implants, complications and oral health-related quality of life (OHRQoL). RESULTS: No patients dropped out. No zygomatic implants were lost, although one implant could not be used because it was placed in an unfavourable position. The orbital cavity was penetrated during the drilling procedure in one patient with no relevant clinical consequences. One patient experienced an infection followed by a fistula in one zygomatic implant, which was successfully treated. The average score from the OHIP-14 questionnaire was 3.4, which is similar to that of the general population. CONCLUSIONS: The present study suggests that four immediately loaded zygomatic implants can be used to rehabilitate patients with severely atrophied maxillae.