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Burs with guide pins for standardized tooth preparation.
K W Boening1, K I Kaestner, R G Luthardt
1Department of Prosthetic Dentistry, Medical Faculty, Carl Gustav Carus, Dresden University of Technology, Fetscherstrasse 74, D-01307 Dresden, Germany. boening@rcs.urz.tu-dresden.de
Quintessence International (Berlin, Germany : 1985)
|June 18, 2002
Summary
Self-limiting diamond burs with guide pins enhance enamel microhardness and do not cause hard tissue damage during precise chamfer preparation for dental restorations. Clinical use is justified.
Area of Science:
- Dental materials science
- Biomaterials engineering
- Restorative dentistry
Background:
- Precise chamfer preparation is critical for successful computer-aided design/computer-aided manufacturing (CAD/CAM) and all-ceramic dental restorations.
- Conventional diamond burs may pose risks of hard tissue damage and suboptimal finish line quality.
- Developing specialized burs is essential to meet the demands of modern restorative dentistry.
Purpose of the Study:
- To develop and evaluate self-limiting diamond burs designed for precise chamfer preparation.
- To assess the safety and efficacy of these burs for CAD/CAM and all-ceramic restorations.
- To compare the performance of novel burs against conventional diamond burs.
Main Methods:
- Development of rounded cylinder and torpedo diamond burs with integrated polished guide pins (0.5 mm length, 0.15 mm radius).
- In vitro testing on 140 human teeth, evaluating finish line quality, enamel microhardness, and dentin thermal alteration.
- Comparison with conventional diamond burs as a control group.
Main Results:
- No mechanical or thermal damage to hard tissues was observed in proximity to the guide pin.
- Significantly higher enamel microhardness was achieved at the finish line using burs with guide pins compared to conventional burs.
- Reduced vibration, potentially contributing to improved outcomes, was suggested by the results.
Conclusions:
- Self-limiting diamond burs with guide pins effectively reduce the risk of hard tissue damage at preparation margins.
- The novel burs demonstrated no adverse effects and are suitable for clinical application.
- These burs offer a safer and potentially more effective method for precise chamfer preparation in modern dental restorations.