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. 2017 Mar;12(1):27-32.
doi: 10.1016/j.jds.2016.05.002. Epub 2016 Aug 9.

Influence of preparation design on the quality of tooth preparation in preclinical dental education

Jeremias Hey  1 , Ramona Schweyen  1 , Philipp Kupfer  1 , Florian Beuer  2
Affiliations

Influence of preparation design on the quality of tooth preparation in preclinical dental education

Jeremias Hey et al. J Dent Sci. 2017 Mar.

Abstract

Background/purpose: One of the major educational goals in preclinical dental education is to learn tooth preparation techniques. The purpose of this study was to evaluate the influence of different preparation designs on the development of the manual dexterity of students, in order to perform a state-of-the-art tooth preparation.

Material and methods: Seventy-two 1st semester students were divided into two groups and educated in tooth preparation for a ceramic anterior single crown. One group received cylindrical burs with a rounded edge to prepare a typodont model with a shoulder finishing line, while the other group had cylindrical burs with round noses to prepare a chamfer finishing line. All preparations were digitized and evaluated using special software focusing on the parameters of preparation depth and preparation angle. In addition, violation of the adjacent teeth was estimated. Data was statistically evaluated at a level of significance of 5%.

Results: The preparation design used did not show a statistically significant influence on the preparation depth or on the preparation angle. A trend to a higher tooth structure removal as required was detected. Furthermore, no influence of the type of preparation design on the number of violated adjacent teeth was found.

Conclusion: In preclinical dental education, the type of preparation design was found to have no influence on the measured parameters representing the quality of the preparation.

Keywords: dental schools; finish line; preclinical dental education; preparation design; tooth preparation.

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Figures

Figure 1
Figure 1
Measurement segments of the width of the finish line according to the clock.
Figure 2
Figure 2
The width of the finish line (x) was measured 1 mm above the real finish line as the shortest distance to the stump surface.
See this image and copyright information in PMC

References

    1. Seymour K.G., Cherukara G.P., Samarawickrama D.Y. Consistency of labial finish line preparation for metal ceramic crowns: an investigation of a new bur. J Prosthodont. 2008;17:14–19. - PubMed
    1. Nishida M., Sohmura T., Takahashi J. Training in tooth preparation utilizing a support system. J Oral Rehabil. 2004;31:149–154. - PubMed
    1. Aminian A., Brunton P.A. A comparison of the depths produced using three different tooth preparation techniques. J Prosthet Dent. 2003;89:19–22. - PubMed
    1. Butel E.M., Campbell J.C., DiFiore P.M. Crown margin design: a dental school survey. J Prosthet Dent. 1991;65:303–305. - PubMed
    1. Guth J.F., Wallbach J., Stimmelmayr M. Computer-aided evaluation of preparations for CAD/CAM-fabricated all-ceramic crowns. Clin Oral Investig. 2013;17:1389–1395. - PubMed

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