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Making fixed prostheses that are not too high.
1Clinical Research Associates, Provo, Utah 84604, USA.
Journal of the American Dental Association (1939)
|February 7, 2006
Summary
Many dental crowns and fixed partial dentures (FPDs) are fabricated too high, leading to seating issues. This study presents techniques for accurate impressions and occlusal records to improve FPD fit and reduce chair time.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Clinical Dentistry
Background:
- A significant number of fixed partial dentures (FPDs) and multiple crowns are returned from dental laboratories with occlusal discrepancies, often described as "high."
- This premature high occlusion necessitates chairside adjustments, increasing treatment time and potentially compromising the restoration's integrity.
Purpose of the Study:
- To outline practical methods for achieving accurate alginate impressions.
- To detail techniques for fabricating precise opposing casts.
- To guide dentists in obtaining accurate interocclusal records (IORs).
Main Methods:
- The article describes systematic approaches to impression material manipulation and tray selection for optimal detail reproduction.
- Techniques for pouring accurate dental stone casts, including proper spatulation and vibration, are discussed.
- Methods for capturing accurate bite registrations, such as using wax or silicone materials, are explained.
Main Results:
- Implementation of the suggested impression and occlusal registration techniques is expected to reduce the incidence of "high" FPDs.
- Improved accuracy in preliminary records will lead to better-fitting definitive restorations.
Conclusions:
- Accurate alginate impressions, opposing casts, and interocclusal records are critical for successful FPD fabrication.
- Adoption of these techniques by dental practitioners can significantly minimize occlusal errors in fixed prosthodontics, enhancing clinical outcomes.