DOI: 10.11607/jomi.10612Language: EnglishZierden, Karina / Reich, Sarah Marie / Vogler, Jonas Helmut Adrian / Wöstmann, Bernd / Rehmann, Peter
Purpose: This retrospective clinical follow-up study assesses double-crown retained implanttooth-
supported removable partial dentures (DCR-ITSRPDs) survival, evaluates abutment
survival and identifies first aftercare measures. Materials and Methods: The influence of various
factors on the survival of the DCR-ITSRPDs and the abutments were observed in this
retrospective clinical follow-up study using Kaplan-Meier estimate. In addition, the first occurred
aftercare measure per prosthesis was evaluated. Results: 47 DCR-ITSRPDs were investigated
(mean observation: 4.3 ± 3.8 years; max. 14.3 years) out of which three (6.4%) had to be
replaced. The 5- and 10- year survival probability for DCR-ITSRPDs was 100% and 75%. A total
of 297 abutments (120 natural teeth and 177 dental implants) were observed, of which 22 (7.4%;
6 teeth and 16 implants) failed. The 5- and 10-year survival probability for teeth was 90.2% and
for dental implants 90.4% and 76.3%. Conclusion: DCR-ITSRPDs are a successful and durable
treatment option for patients with substantially reduced residual dentitions. Both, prostheses and
abutments show good survival times after 5- and 10-years in function. The patient associated
factors tested showed no influence on the survival of DCR-ITSRPs and abutments. Peri implant
infection was the decisive factor for abutment loss, therefore, regular dental prophylaxis and
examinations are of major importance.
Keywords: removable dental prosthesis, double crown, dental implants, tooth-implant supported, survival
