Bone shape or bone quantity relates to the degree of bone loss or bone resorption present. The more bone that is present at an implant site, the better the possibility for implant success (shapes A and B) When excessive bone loss occurs, (shapes D and E), bone grafting may be necessary for successful placement of dental implants. Dental implants will preserve the bone volume over time by positively stimulating the bone.
Bone Quality relates to the degree of bone density present. Type 1 is dense bone, which provides great cortical anchorage, but limited vascularity. Type 2 bone is the best bone for osseointegration of dental implants. It provides good cortical anchorage for primary stability, yet has better vascularity than Type 1 bone.
Types 3 and 4 are soft bone textures with the least success in type 4 bone.
Bone quality can improve around a functional osseointegrated dental implant, due to the positive bone stimulation.
Good cortical anchorage is necessary for immediate functional loading of dental implants. It is agreed that this treatment should be limited to areas of good bone quality.