Related Experiment Videos
Tooth structure removal associated with various preparation designs for posterior teeth
Daniel Edelhoff1, John A Sorensen
1Department of Prosthodontics, School of Dentistry, Medical Centre, University of Aachen, Germany.
Summary
Innovative dental preparation designs for fixed prosthodontics significantly conserve tooth structure. Adhesive and inlay preparations are least invasive, while complete crowns require substantial removal, offering better tooth prognosis.
Area of Science:
- Dental Materials Science
- Prosthodontics
- Restorative Dentistry
Background:
- Fixed prosthodontics relies on abutment preparation, influencing tooth structure removal.
- Conventional preparation designs often involve significant tooth reduction.
- Minimally invasive techniques are crucial for long-term tooth prognosis.
Purpose of the Study:
- To quantify tooth structure removal for various fixed prosthodontic preparation designs.
- To compare the invasiveness of innovative versus conventional preparation techniques.
- To introduce a classification system for tooth preparation designs.
Main Methods:
- Four typodont resin teeth (maxillary/mandibular premolars/molars) were prepared in diverse abutment designs.
- Tooth structure removal was measured using gravimetric analysis post-preparation.
- Preparations were categorized for all-ceramic or metal-supported restorations.
Main Results:
- Adhesive (A2) and inlay (13) preparations were least invasive, removing 5.5%–27.2% of tooth structure.
- Complete crown preparations (F1, F3) were most invasive, removing 67.5%–75.6% of tooth structure.
- F3 retainers required nearly 14 times more structure removal than A2 preparations.
Conclusions:
- Innovative preparation designs, such as adhesive and inlay types, conserve significant tooth structure.
- Complete crown preparations necessitate substantial tooth reduction, impacting prognosis.
- The study provides a classification and accurate measurement for preparation designs, supporting conservative dentistry.