Abstract
Placement of extrasinus zygomatic implants to support implant-supported rehabilitation is still controversial due to the scarcity of data. To evaluate the clinical outcomes of 94 extrasinus zygomatic implants, installed laterally to the maxillary sinus, for rehabilitation of the edentulous atrophic maxillae. A total of 42 patients (mean age 58 years) with severely atrophic maxillae were treated between November 2010 and July 2011, and followed up until July 2014. A total of 273 implants (94 zygomatic implants and 179 conventional implants) were used. The patients were followed in a standardized clinical and radiographic method. During the 3-year study period, 1 zygomatic implant and 4 conventional implants failed, resulting in a survival rate of 98.9% and 97.7% respectively. All restorations with titanium-welded bars were installed either 3 days after surgery (immediate loading) or 6 months after surgery (delayed loading), and were successful until the last follow-up appointment, except for minor technical problems. No patient presented any type of sinus adverse event. No other significant occurrences were reported. This 3-year clinical follow-up study indicates that extrasinus zygomatic implants represent predictable treatment option atrophic maxillae. Further longitudinal prospective clinical studies are necessary to confirm these results.
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