Reimplantation and extrusion of a tooth are known to effect that periodontal tissues and the buccal bone-lamella can be preserved and improved. Therefore, as an alternative, a modification and modified combination of both techniques should be investigated.
Methods: In this study, 11 long-term non-conservable teeth with intact attached gingiva were extracted at 10 patients. The teeth were resected below the dento-gingival fibers, retrogradely root-filled, reimplanted and bonded to the adjacent teeth. As it is possible to gain vertical tissue reponse by tooth extrusion, 6 of them were extruded by elastic bands within 2-5 days for about 1-2 mm after primary fixation of 10-14 days, then fixed again. Throughout both approaches, 7 implants at 6 patients were inserted after 3-6 months, and during 6-54 months the stability and changes of the soft- and hard-tissues were studied . The documentation was done with photographs, radiographs, DVTs and models.
Results: As a result it can be documented, that all reimplanted teeth adhered without complications. The attached gingiva as well as the alveolar bone could be preserved or vertically gained by extrusion.
Implant-supported restaurations in reimplanted regions were as successful as in late implant placements.
Conclusion: The REHRT-technique allows predictable preservation and gain of tissue, as well as cost-reduction, minimal invasiveness and time saving, and is able to meet highest requirements.