Photoelastic experiments on the implantation of a bone graft into the mandible with stable compression osteosynthesis

The implantation of a bone graft into the mandible was simulated in photoelastic model tests. Problems posed by the lingual and alveolar areas untouched by the plate are discussed. The tests showed that in both problem areas enough interfragmentary pressure can be built up using a five-hold DC (dynamic compression) plate with a short implant and two four-hole DC plates with a long implant, whenever the metal plates have dynamic compression holes (DC), are prebent and the screws are in converging position. This is a prerequisite for a rapid revascularization of the implanted bone graft and primary bone healing. These tests and our clinical experience showed that with small implants using a five-hold plate and with long implants using two four-hole plates, and physiologically stressing the bone implant, the principles of stable compression osteosynthesis without intermaxillary immobilization have proved themselves.