Subperiosteal implants: a real option when your jaw cannot anchor standard implants

When the alveolar ridge has resorbed past what a graft can rebuild, a custom subperiosteal implant restores the smile that an "All-on-4 not possible" verdict took away.

A woman in her sixties has been told by three different clinics that she "is not a candidate for implants." Her maxilla has 2 to 3 millimetres of residual bone above the sinus floor. Sinus lifting was offered, refused. Zygomatic implants were mentioned and dismissed as too aggressive. She has been wearing a complete upper denture that no longer fits, for six years. She is asking whether anything else exists. It does. Custom subperiosteal implants are a forgotten option that modern CBCT imaging and 3D printing have brought back into the conversation — and into our surgical day at aiHealth Medical Center. They are not first-line. They are the right answer in a small, specific group of patients for whom standard endosseous implants are biologically impossible. What a subperiosteal implant actually is A subperiosteal implant is a custom titanium framework that sits on top of the residual jawbone, underneath the periosteum, with abutment posts emerging through the gum to receive the prosthesis. It does not require drilling into the bone — it embraces it. The framework is designed from a high-resolution CBCT scan (we use Newtom and Fussen Technology AI-assisted CBCT for our planning) and 3D-printed in medical-grade titanium so it fits the patient's own bony anatomy at the micron level. The classical 1940s and 1950s subperiosteal designs failed because they were hand-bent on plaster models — Bodine and Yanase's long-term data showed loosening and tissue dehiscence at unacceptable rates. The modern CAD/CAM versions, planned on volumetric imaging, are a different device. A subperiosteal framework sits over the residual ridge — design happens entirely on the CBCT before the patient enters the surgical room. When it is the right answer The honest indication is a severely atrophic maxilla — Cawood Howell class V or VI — where there is insufficient bone for a standard implant, the patient has already declined or failed sinus augmentation, and zygomatic implants are either anatomically problematic or refused. For this small group, a custom subperiosteal implant restores a fixed dentition without grafting. In the more recent literature (Mommaerts, Int J Oral Maxillofac Surg , 2017, and following case series) the survival rate with modern CAD/CAM frameworks is reported above 90% at five years, with the dominant failure mode being soft-tissue dehiscence rather than mechanic…

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