Conclusion :
Placing an implant in a site with COD comes with a high risk on infection. Patients must be informed of all the therapeutic options and a consent form must be signed beforehand.
If implant rehabilitation is requested, our main concern is to minimize the risk of infection especially during and after the drilling sequence. The three-stage protocol described in this paper proved to be successful in terms of preventing contamination of the implant surface even when infection occurs. Further clnical and histological studies must be carried out to further assess the benefits of this protocol.