Bone implant contact and its relationship with the strain on the surrounding bone
Objective: To measure the strain developed in the simulated bone around implants with different percentages of bone implant contact
Methodology: Three implants of dimension 3.75×11.5 mm were mounted on acrylic blocks with different bone implant contact (BIC) areas viz., 100%, 75% and 50%. Metal ceramic crowns were fabricated on each implant. Strain gauges were attached to the acrylic block adjacent to the cervical area of each implant. Static loads of 200, 400, 600 and 800 N were applied at the central fossa of the crown using universal testing
machine and the strain was measured.
Results: Mean strain developed per 100 N in case of 50% BIC was 8 microstrain, 75% BIC was15 microstrain and 100% BIC was 21 microstrain.
Conclusions: Strain recorded was directly proportional to the bone implant contact.