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The chamfer finish line: preclinical student performance using different bur designs.

Michael A Mansueto1, Hatem A Abdulkarim, Walid R Thabet

  • 1San Antonio, 7703 Floyd Curl Drive, San Antonio, TX 78229-3900, USA. mansueto@uthscsa.edu

Journal of Dental Education
|June 3, 2010
PubMed
Summary

Sophomore dental students performed better when creating chamfer finish lines with round-ended burs compared to torpedo-shaped burs. A majority of students also preferred the round-ended bur for this dental preparation technique.

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Area of Science:

  • Dental education
  • Restorative dentistry
  • Dental materials and instruments

Background:

  • Dental students require proficiency in creating precise finish lines for restorations.
  • The choice of dental burs can influence the quality of cavity preparation and student learning outcomes.

Purpose of the Study:

  • To compare the performance of sophomore dental students in creating chamfer finish lines using round-ended versus torpedo-shaped diamond burs.
  • To gather student feedback on their preferences for these two bur types.

Main Methods:

  • Fifty sophomore dental students prepared chamfer finish lines on typodont molars using either a round-ended or a torpedo-shaped bur.
  • Performance was objectively scored, and data were analyzed using the Wilcoxon signed-rank test.
  • Student preferences were collected via a survey with qualitative feedback.

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Main Results:

  • Student performance in creating chamfer finish lines was significantly better with the round-ended bur (p=0.005).
  • Fifty-eight percent of students expressed a preference for the round-ended bur.
  • Common student feedback indicated the torpedo-shaped bur produced finish lines that were too shallow or too long.

Conclusions:

  • The round-ended diamond bur is a more effective instrument for teaching sophomore dental students to create chamfer finish lines.
  • Student feedback aligns with performance data, suggesting a preference for burs that facilitate more accurate finish line preparation.