Immediate and delayed implantation for complete restoration of the jaw following extraction of all residual teeth: a retrospective study comparing different types of serial immediate implantation.

From April 1986 to September 1993, 134 implants (97 immediate implants, 26 early secondary immediate implants, and 11 late secondary implants) were placed in 20 patients following extraction of all residual teeth. After a mean follow-up period of 27.1 months, the implants were analyzed with regard to peri-implant soft tissue parameters and bone resorption. When the examination was performed, 131 implants (97.7%) were found to be functioning successfully. The mean pocket depths varied between 1.3 and 2.6 mm, and the peri-implant bone resorption showed values between 0.5 and 1.3 mm. Fixed and removable prostheses revealed equal results with regard to the parameters examined. The results of the present study indicate that serial immediate implantation can be considered to be a very promising implant treatment modality for serial teeth extraction, if specific parameters are taken into account.