The Zygoma Implant
Sterling R. Schow, DMD
Stephen M. Parel, DDS

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Severely resorbed edentulous maxillae present very complex problems for the surgeon and restorative dentist. Lack of internal osseous stimulation and nonphysiologic crestal bone loading results in continued resorption of an already atrophic edentulous maxilla. The end result is an inability to use a conventional full denture prosthesis.

In 1999 Dr. Per-Ingvar Brånemark and colleagues introduced the zygoma implant(P-I Brånemark, personal communication, 1999). In their initial study over a 10-year period, 110 implants were placed. Each patient had an additional two to four conventional implants placed in the anterior maxilla, which was restored with cross arch stabilization. Of the zygoma fixtures placed and restored in the initial study, only two were lost in the first year of occlusal loading, and three failed in the subsequent 8 years for a long-term success rate of > 95%.

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