Subperiosteal implants 563

Fig. 12-84. A Panorex x-ray of the subperiosteal implant shows the topography of the bone that it covers. This implant should have been contraindicated because it opposed natural teeth.

A

B

Fig. 12-85. A, A preoperative picture showing missing right central and lateral incisors. B, There were no caries or preexisting fillings in any of the teeth.

Fig. 12-86. The tissue was incised to expose the underlying bone.

Fig. 12-87. Transfixation pins were drilled through the alveolar bone from the palatal surface to the labial surface deep in the canine eminence.

PARTIAL MAXILLARY SUBPERIOSTEAL IMPLANTS WITH HORIZONTAL TRANSFIXATIONS

Horizontal pins may be used to help stabilize and support a maxillary subperiosteal implant. In this case, a 32-year-old man was missing right maxillary central and lateral teeth (Fig. 12-85) . He had neither decay nor fillings in any of his maxillary teeth. His anterior quadrant flared out anteriorly so that there was an overjet of about 5 or 6 mm. over the lower teeth. In order to spare the neighboring teeth from full crown restorations, a unilateral subperiosteal im-