spare several mm. for the fixed superstructure (13). Carefully, the telescopic coping is tapped occlusally away from the cantilevered pontic enough, so that it can completely disengage the pontic, and horizontal arm, so that cement can be added, and it once again can be locked into position (14, 15). The procedure is repeated on the other side and the tissues are sutured closed. When sufficient healing has taken place, an impression for both posterior fixed bridges are accomplished, using always an elastic type of impression. Sometimes lead foils (from periapical radio-graphs) are used by folding them over the horizontal arms, and allowing the foil to touch the underlying gingival tissues, thus blocking out the undercut areas beneath the horizontal arms, and the impression is taken with them in place (16, 17).

Technique #2:

When the anterior portion of a subperiosteal implant remains and a denture prosthesis is contemplated, the following procedure is followed:

An impression of each post is taken and a telescopic coping with a horizontal hollow tube is cast (1). The ramus blade is tapped into its groove made on the buccal side of the ramus, so that its horizontal arm is tipping upward (2). The telescopic coping with its distally extended hollow tube is fitted over the posterior extension arm (3), and the arm is manipulated down-ward while the coping slides along the horizontal bar until it snaps into place over the corresponding subperiosteal implant post. The other side is done in the same manner and cementing procedure is also followed as previously described (4). Either, an all acrylic splint is fabricated and cemented permanently (5), or a denture

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