[Clinical observation of implant immediate loading in periodontitis patients]

To evaluate the clinical performance of implants placed immediately after extraction of remaining teeth due to severe periodontitis and immediately loaded for prosthetic oral rehabilitation.

Twelve patients in need of complete maxillary or mandibular rehabilitations due to severe periodontitis were enrolled in this study and received periodontal treatment for management of periodontitis. The remaining teeth were extracted, debridement around the periodontally compromised sites was performed. The implants were inserted under guidance by a surgical template, and a prefabricated screwed-retained provisional restoration was immediately delivered on implants. Definitive prostheses were inserted after 6 months. Clinical and radiographic analyses were performed at 1, 6, 12, 24 months.

A total of 84 implants were placed, 50 in the maxilla and 34 in the mandible. Thirty-two implants were placed directly in extraction sockets. Four implants in 3 patients failed within the first 6 months, resulting in a total implant survival rate of 95% (80/84). The survival rate was 92% (46/50) in the maxilla, 100% (34/34) in the mandible. Prosthetic success was 100%. All the failures occured in the first 6 months and no failure in the next two years of follow-up. The mean bone level change at 1 and 2 year were (-1.12 ± 0.18) mm and (-1.28 ± 0.14) mm. There were no significant differences in insertion torque and alveolar bone loss between the post-extraction sites and healed sites.

The immediate protocols in periodontally compromised maxilla or mandibular contributed to a satisfactory prosthetic success during the 2-year follow-up.