The materials and techniques for tooth replantation in presence of complications are discussed on the basis of recent advances in oral medicine and surgery and dentistry. The following complications are examined: mucous and cutaneous wounds, retention of teeth and foreign bodies, bony and radicular fractures with or without tissue loss, root drying, infection. Other problems are also discussed: replantation of deciduous teeth, endodontic therapy, stabilization of replanted teeth, application of orthodontic forces. Some technical principles are presented for a better management of various clinical situations. At last, interesting clinical cases are reported.