Bone defects caused by trauma, infection, tooth loss, pathological
lesions, etc., often lead to an abnormal form of maxillary and
mandibular alveolar growths. When a tooth is lost, there is a lack of
residual bone stimulation. It reduces and bone density in that area and
loses external width and bone height. Bone width decreases by 25% during
the first year of tooth loss and total 4 mm of height during the first
year of extraction of teeth for a complete denture. It is lost
immediately. Therefore, the remaining bone will not have a suitable
anatomy for implant use without bone grafting. Different types of bone
grafts such as allografts, auto grafts and allogeneic materials have
been considered. Due to the Osteo conductive and Osteoinductive
properties of autogenous bone, these materials are considered the
standard method for correcting bone defects. For predictable bone growth
in narrow ridges (0.5-4 mm), autogenous bone should be used. Only
particulate grafts should be modified to improve prosthetic
communication or autogenous bone block is used.