Subperiosteal implant

October 7, 2011 | By | Reply More

Subperiosteal implant


Implant with a removable superstructure. Cobalt/chromium casting that is inserted between the periosteum and the bone to support a denture.


The first subperiosteal implant was placed by Dahl in Sweden in 1943 and this technique was employed until the early 1980s.  The technique was slowly discontinued and replaced by blade-vent implants and subsequently by endosseous implants.


This technique provided additional support and retention in an atrophic ridge situation. Whilst the implants had a reasonable success rate at five years it dropped dramatically after this period.


• The technique involved the taking of an impression of the underlying bone, necessitating a surgical procedure, and a subsequent procedure to place the metal casting.

• Bone resorption progressed and therefore these frameworks soon no longer fitted the underlying bone

• Commonly infections tracked down the implant post causing infections in the underlying bone and exposure of the metal casting.


1. A surgical procedure was carried out to expose the bone and an impression of this was made.

2. This was then used to cast a cobalt/chromium framework which was placed under the periostium; sometimes anchorage screws were placed to secure it to the underlying bone. This was allowed to heal and a casting which had previously been made to fit the implant posts was incorporated into the denture base.

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Category: Dental, Prosthodontics

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