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Study on high-strength plastic teeth. Tooth discoloration
1Department of Removable Partial Denture Prosthodontics, Nihon University School of Dentistry, Tokyo, Japan.
The Journal of Nihon University School of Dentistry
|September 1, 1993
Summary
High-strength plastic teeth (HS teeth) show improved resistance to pigments compared to conventional plastic teeth (CV teeth), though they are more susceptible than porcelain teeth. Ultrasonic cleaning may reduce staining in all artificial tooth types.
Area of Science:
- Dental Materials Science
- Biomaterials Engineering
- Prosthodontics
Background:
- Conventional plastic teeth (CV teeth) exhibit poor esthetics and durability due to wear and discoloration, limiting their use in dental prosthetics.
- High-strength plastic teeth (HS teeth) were developed to address wear issues but remain susceptible to pigment staining, impacting denture esthetics.
- Understanding the pigment susceptibility of different artificial tooth materials is crucial for improving the longevity and appearance of dental restorations.
Purpose of the Study:
- To evaluate the in vitro susceptibility of high-strength plastic teeth (HS teeth) to pigment staining compared to conventional plastic teeth (CV teeth) and porcelain teeth.
- To assess the effect of ultrasonic cleaning on the coloration of different artificial tooth materials when exposed to pigments.
Main Methods:
- An in vitro study was conducted involving the immersion of three types of artificial teeth (CV teeth, HS teeth, and porcelain teeth) in three different coloring liquids.
- One set of each tooth type was subjected to daily ultrasonic cleaning, while a control set was not.
- Coloration was assessed comparatively across all groups and conditions.
Main Results:
- High-strength plastic teeth (HS teeth) demonstrated reduced susceptibility to pigments compared to conventional plastic teeth (CV teeth).
- However, HS teeth exhibited significantly higher susceptibility to pigment staining than porcelain teeth.
- Ultrasonic cleaning showed a tendency to decrease the degree of coloration for all tested artificial tooth types compared to those without ultrasonic treatment.
Conclusions:
- High-strength plastic teeth offer an improvement over conventional plastic teeth regarding pigment resistance but do not match the stain resistance of porcelain teeth.
- The findings suggest that while HS teeth are a viable option, careful material selection and maintenance strategies are needed for optimal esthetic outcomes in removable partial dentures.
- Ultrasonic cleaning may be a beneficial adjunct for maintaining the esthetics of various artificial tooth materials by reducing pigment accumulation.