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Tooth structure removal associated with various preparation designs for anterior teeth
Daniel Edelhoff1, John A Sorensen
1Department of Prosthodontics, School of Dentistry, Medical Center, University of Aachen, Germany.dedelhoff@ukaachen.de
The Journal of Prosthetic Dentistry
|June 19, 2002
Summary
Innovative tooth preparations for veneers and resin-bonded prostheses remove significantly less tooth structure than traditional crowns. These less invasive methods preserve more natural tooth material, enhancing vitality and reducing sensitivity.
Area of Science:
- Restorative Dentistry
- Dental Materials Science
- Conservative Dentistry
Background:
- Conserving sound tooth structure is crucial for maintaining tooth vitality and minimizing postoperative sensitivity.
- Innovative preparation designs, such as those for porcelain laminate veneers, offer a less invasive alternative to conventional complete-coverage crown preparations.
- Quantifying tooth structure removal for various preparation designs has been lacking.
Purpose of the Study:
- To quantify and compare the amount of tooth structure removed during innovative and conventional tooth preparation designs.
- To establish a comprehensive classification system for tooth preparation designs.
Main Methods:
- Resin typodont teeth (maxillary incisor, canine; mandibular incisor) were prepared using various porcelain laminate veneer (V1-V4), resin-bonded retainer (A1-A2), and all-ceramic/metal-ceramic crown (F1-F3) designs.
- Gravimetric analysis was employed to measure the mass of removed coronal tooth structure after preparation (n=10 per group).
- Statistical analysis using ANOVA determined significant differences in tooth structure removal between designs (P<.05).
Main Results:
- Significant differences in tooth structure removal were observed across preparation designs.
- Porcelain laminate veneer and resin-bonded retainer preparations were least invasive, removing 3%-30% of coronal tooth structure.
- All-ceramic and metal-ceramic crown preparations removed substantially more tooth structure (63%-72%).
- Metal-ceramic crown preparations (F3) required 4.3 times more tooth structure removal than facial-only veneer preparations (V2).
Conclusions:
- Tooth preparations for porcelain laminate veneers and resin-bonded prostheses necessitate significantly less tooth reduction compared to conventional complete-coverage crowns.
- These findings support the use of minimally invasive preparations for enhanced tooth conservation.
- The study provides quantitative data to guide clinical decisions regarding preparation design selection.