EFFECTS OF CALLUS AND BONDING ON STRAINS IN BONE SURROUNDING AN IMPLANT UNDER BENDING

Descriptions of the healing and adaptation of endosseous implants have been provided; however, their effects on mechanical parameters such a s maximum and minimum principal strains, strain energy density, and ma ximum sheer strain have not been addressed. Three linear, elastic, and partially anisotropic finite element models were generated to simulat e the immediate postoperative period, time of provisional loading, and long-term adaptation of bone surrounding implants. In each model, unb onded and bonded interface conditions were imposed. Bone geometry was estimated from dental implants Placed in femurs of hounds. A lateral l oad was applied and the mechanical parameters were calculated. Interfa ce bonding decreased the peak minimum principal strain 2.6 to 6.4 fold , while the presence of a callus reduced it 3 to 7 fold. These data do cument the critical stabilizing roles of callus and bond formation.