344 Theories and techniques of oral implantology

Fig. 9-29. Inc copings auu casuug are piaccu uvi implants and bicuspid preparation respectively.

Fig. 9-32. A periapical x-ray showing completed case. (From Linkow, L. I.: Intra-osseous implants utilized as fixed bridge abutments, J. Oral Implant Transplant Surg. 10121:17-23.1964.1

Fig. 9-30. The processed veneer type bridge is fitted. (From Linkow, L. I.: Intra-osseous implants utilized as fixed bridge abutments, J. Oral Implant Transplant Surg. 10[2]:17-23, 1964.)

Fig. 9-31. The prosthesis is cemented with hard cement. (From Linkow, L. I.: Intra-osseous implants utilized as fixed bridge abutments, J. Oral Implant Transplant Surg. 10[2]:17-23, 1964.)

all excess on the tissue-bearing surface was removed and the splint polished. (The splint may or may not be relined with a soft material.) The splint was inserted, with temporary cement only inside the area to cover the natural tooth abutment.

On the third visit, the final fixed partial denture was tried in position (Fig. 9-30). It was ground into proper occlusion (Fig. 9-31), and a final intraoral periapical x-ray was taken (Fig. 9-32). Cementation of the bridge with one of the permanent type cements was then accomplished.

Case 3

Unilateral posterior free-end saddle restoration using a vent-plant and a triplant

Although there was enough bone height in the patient described in this case to use two post type implants, a tripodial unit was used in symbiosis with one post implant. The triplant was used in the second molar area, and in order to avoid penetrating the mandibular canal the pins diverged 45 degrees from one another.

Before the implant intervention, the two anterior teeth were prepared for full crown restorations and first impressions made. Then the vent-plant was inserted in the region of the first molar, checking the depth and direction of the burs and the implant with x-rays (Fig. 9-33) .

With each step carefully analyzed by x-ray, the triplant pins were inserted one by one so as to straddle the canal. The protruding heads were bent together and fused with cold cure acrylic. When the acrylic core hardened, it was prepared for a full crown restoration (Fig. 9-34) .

Elastic impressions, with a wax interocclusal record of centric relation, were made for the fabrication of the fixed partial denture (Fig. 9-35). This was