Following a tooth extraction, the bone surrounding the extracted tooth shrinks because the body is unable to reproduce enough replacement bone. This usually leaves a noticeable aesthetic defect. Occasionally, accidents cause bone loss that will affect a smile adversely even when after the area is restored with a bridge.
Although these defects can be reduced with careful extraction of teeth, bone loss is unavoidable unless some form of oral bone graft is placed in site where tooth has been extracted. Even with bone grafting, some bone loss does occur but significantly lower than witserviceshout grafting.