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Long-term retrospective clinical study of tooth-supported fixed partial dentures: A multifactorial analysis
Mohammed Abdullah Hawthan1,2, Bruno R Chrcanovic1, Christel Larsson1
1Department of Prosthodontics, Faculty of Odontology, Malmö University, Malmö, Sweden.
Journal of Prosthodontic Research
|August 28, 2022
Summary
Smoking and prosthesis material type significantly impact the survival of tooth-supported fixed partial dentures (FPDs). These factors increase the failure rate, regardless of abutment tooth vitality, highlighting key areas for improved dental restoration longevity.
Area of Science:
- Dental materials science
- Prosthodontics
- Clinical dentistry
Background:
- Tooth-supported fixed partial dentures (FPDs) are common restorative solutions.
- Understanding factors influencing FPD survival is crucial for long-term clinical success.
- Abutment vitality and prosthesis characteristics are potential determinants of FPD longevity.
Purpose of the Study:
- To evaluate the impact of various factors on the survival rates of tooth-supported FPDs.
- To investigate the influence of abutment vitality (vital vs. non-vital) on FPD success.
- To identify key predictors of FPD failure in a retrospective cohort.
Main Methods:
- Retrospective cohort study analyzing patient records of 3-to-7-unit tooth-supported FPDs.
- Minimum follow-up of 6 months post-prosthesis delivery.
- Cumulative survival rate (CSR) calculation and Cox regression analysis for covariate association.
Main Results:
- 331 FPDs in 229 patients were analyzed, with 5- and 10-year CSRs of 90.1% and 77.6%, respectively.
- FPD failure was most common early after placement, primarily due to abutment loss or retention issues.
- Smoking and prosthesis material type significantly affected FPD survival; abutment vitality did not.
Conclusions:
- Smoking and prosthesis material type are significant risk factors for tooth-supported FPD failure.
- These factors appear to influence FPD survival independently of the vitality of the supporting abutment teeth.
- Optimizing material selection and addressing smoking cessation can improve FPD longevity.
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