give a passive but definite form of stabilization of the denture.

In these situations also, it is quite possible to use blades consisting of no necks and no posts, but exhibiting an internal screw system through part of its blade depth (9). These blades can be buried into each cuspid region (10) and the tissues sutured completely over them. Six months later, after dense bone has grown through the openings of the blades, the tissues are opened again, and the posts are screwed into the internal screw system of the blades (11) , and procedures to complete the anterior denture sup-port are accomplished (12) .

It is the authors belief, however, that in a totally edentulous arch, if a full arch prosthesis supported by at least three or four blades cannot be accomplished, one must be very uncertain as to long term success using only anterior implants.

Sometimes also, an anterior subperiosteal implant using lingual fingers over the lingual surface of the mandible and extending the struts in both lateral directions just mesial to the mental amina, might work successfully. Naturally it is used to support a removable, rather than a fixed prosthesis.

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