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Long-term evaluation of extensive restorations in permanent teeth
J-P Van Nieuwenhuysen1, W D'Hoore, J Carvalho
1School of Dentistry, Catholic University of Louvain, 15 Hippocrate Avenue, B-1200, Brussels, Belgium. vannieuwenhuysen@patd.ucl.ac.be
Journal of Dentistry
|July 25, 2003
Summary
Extensive amalgam restorations can be a suitable alternative to crowns, especially in premolars, offering comparable longevity. However, factors like restoration size and patient age influence long-term success.
Area of Science:
- Dentistry
- Restorative Dentistry
- Dental Materials
Background:
- Posterior extensive restorations are crucial for tooth preservation.
- Understanding failure modes and risk factors is essential for improving longevity.
Purpose of the Study:
- To assess the long-term outcomes of posterior extensive restorations.
- To identify risk factors associated with restoration failure.
Main Methods:
- A prospective, longitudinal study involving 722 amalgam, 115 composite resin restorations, and 89 crowns in 428 adults.
- Follow-up data collected from 1982 to 1999, with well-defined criteria for preparation and material selection.
Main Results:
- 48% of restorations were functioning well; 28% had failed.
- Common failures included restoration fracture (8%), secondary caries (6%), and cusp fracture (5%).
- Premolar teeth showed higher failure rates (34%) than molars (27%). Median survival: amalgam 12.8 years, resin 7.8 years, crowns >14.6 years.
Conclusions:
- Extensive amalgam restorations can be a viable alternative to crowns, considering their longevity.
- Composite resin restorations showed shorter survival times compared to amalgam and crowns.
- Restoration extension, patient age, and treatment period significantly influenced survival rates.