Sometimes a jaw is simply not able to house a dental implant. The bone density may be too low, and then the implant cannot be secured in the jawbone. If a tooth has been missing for too long, it may be the case that the alveolar tissue is so far gone down the path of disintegration that nothing is left of it, in these cases the jaw bone needs to be augmented. This can be done by way of bone augmentation therapies, such as a bone graft or the insertion of artificial bone material.