You need a bone graft if your jawbone does not have enough bone material to secure an implant. The implant will need a solid foundation of bone in order to not become dislodged or otherwise moved during the normal wear and tear that comes from eating and biting. If you have a tooth that has been missing for a long time, and the bone has receeded due to not being pushed, than you may need a bone graft to augment the bone so that it may house the dental implant.
If you are over 65, you may experience weakening of bone material or bones becoming more brittle. If this is the case you may also need a bone graft. Those suffering from gingivital diseases, periodontitis, or any other sort of disease that may lead to gum and tooth loss may also need to have a bone graft in order to secure the success of a dental implant. The only way to know for sure if your jaw has receded enough to warrant the use of a bone graft is to have the dentist see your jaw during a dental implant consultation session, and he will tell you whether or not it is necessary. However, if your jaw bone is not thicker than three or four millimeters, a bone graft is very likely going to have to be done in order to ensure a successful implantation process.
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