What question did this study set out to answer?

This report aims to present a protocol for addressing zygomatic implant failure complicated by sinusitis.

May 14, 2026

Managing Zygomatic Implant Failure With Pterygomaxillary Implant and Sinus Floor Elevation: A Technical Note

Key Points

This report aims to present a protocol for addressing zygomatic implant failure complicated by sinusitis.
Patient presented with failed right zygomatic implant and sinusitis 11 months post-implantation.
Sectioning of the failed implant was performed, followed by insertion of a pterygomaxillary implant and sinus floor elevation with intermediate implant placement.
Monitoring of prosthetic function and infection resolution throughout treatment.
Successful management of the sinus infection was achieved, enabling prosthetic functionality.
The final prosthesis showed good stability at the 1-year follow-up with support from the pterygomaxillary and intermediate implants.

Abstract

This report describes a safe and staged protocol for managing the failure of a zygomatic implant complicated by severe sinusitis, using a pterygomaxillary implant and subsequent sinus floor elevation with intermediate implant placement. A 67-year-old male presented with a failed right zygomatic implant and refractory sinus infection 11 months after full-arch maxillary rehabilitation. After sectioning the zygomatic implant at the inferior border of the zygomatic arch, the authors inserted a pterygomaxillary implant and subsequent sinus floor elevation with intermediate implant placement to support a new restoration. The protocol successfully resolved the sinus infection and maintained prosthetic function throughout treatment. The final prosthesis, supported by the pterygomaxillary implant, the new intermediate implant, and the remaining stable implants, demonstrated good stability at the 1-year follow-up. Further long-term studies are needed to comprehensively evaluate the protocol's efficacy and stability.

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