Originally the toroplant was designed as a simple subperiosteal implant for the anterior portion of the hard pal-ate. Its purpose was to stabilize a full removable conventional denture when bone loss or soft tissue conditions prevented the denture's stabilization by the patient's own morphology. Here the patient had an almost flat, featureless upper arch (1). A thin vitallium plate (2) was cast from an impression of the exposed palate. Protruding from the plate were three pillars, which would pass through the soft tissues (3) and anchor a gold template (4,5) with male "ring lock" attachments. The template fitted flush to the soft tissue, and was cemented over the pillars. It snapped into a modified palatal portion of the new denture (6,7) with the female "ring lock" attachments, thus immobilizing it for a more secure fit (8). Unfortunately in most such cases, the cement seals broke.
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