Type of bone graft
Yes, the bone graft will resorb.
The time of resorption depends on the type of bone graft they placed. Some crystalline grafts, such as bovine, will take muck longer to resorb than demineralized bone allografts. Resorption also depends on the surgeon's technique, location of the graft, age of the patient, systemic illnesses, etc. A well placed crystalline graft with biologic mediators one year +.