Abstract
Recently, we have seen remarkable progress in implant therapy with respect to its technique, hardware, and diagnostic approach. The progress has made safe and reliable implant fixation available to treat injuries and/or dislocations that have previously been considered difficult to treat via hardware fixation. For example, immediate implant placement method and maxillary sinus lift surgery are considered effective in treating complex injuries. Moreover, recent improvement in the implant surface is allowing rapid osseous union.In addition, a remarkable advancement of the diagnostic equipment, such as CT, is making implant fixation available to treat high-risk injuries. Nonetheless, we cannot deny the possibility of osteointegration to be lost after the weight-bearing period. There is currently no procedure that can be considered effective in fixing the loss of osteointegration.In this study, patients were administered physical stimulation in order to treat the loss of osteointegration and/or mal-osteointegration with Periotest（Gulden.Modautal, Hesse）, which resulted in in a reliable promotion of osteointegration.
