Maxillary Dentures Supported by Mushroom-Shaped Mucosal Implants?

Dr. Flynn asks:

A local general dentist is advertising palateless maxillary dentures supported by mushroom-shaped mucosal dental implants.

Apparently the denture must be worn for two months while the soft
tissue heals around the dental implants (which do not appear to extend into
the bone). I can not find any information concerning this procedure.
Has anyone heard of this and/or had any experience with this?

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