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Long-term evaluation of root-resected molars: a retrospective study
C H Basten1, W F Ammons, R Persson
1Department of Periodontics, University of Washington, Seattle, USA.
Summary
Root-resected molars can achieve high survival rates, with 92% surviving over 12 years when treated conservatively. This study highlights their long-term success as abutments in complex dental restorations.
Area of Science:
- Dentistry
- Periodontology
- Endodontology
Background:
- Periodontally compromised molars often require root resection.
- Complete-mouth reconstructions demand stable abutment teeth.
Purpose of the Study:
- To evaluate the long-term survival and success of root-resected molars used as abutments in complete-mouth reconstructions.
- To identify factors influencing the longevity of treated molars.
Main Methods:
- Retrospective study of 49 root-resected molars in 32 patients.
- Conservative endodontic treatment and periodontal therapy (pocket reduction, osseous surgery).
- No threaded posts used; provisional restorations placed before periodontal treatment.
Main Results:
- 92% of root-resected molars survived for an average of 12 years (range: 2-23 years).
- Failure causes included recurrent caries, endodontic issues, and strategic reasons.
- Successful long-term maintenance is achievable with meticulous, multidisciplinary care.
Conclusions:
- Root-resected molars can be successfully maintained long-term as abutments in complete-mouth restorations.
- Careful case selection, endodontic, periodontal, restorative, and maintenance therapies are crucial.
- This approach offers a viable option for preserving periodontally involved teeth.