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MICRO: The International Journal of MicroDentistry

Edited by Bryan S. Pearson, DDS, MS

ISSN 2151-4143

MICRO: The International Journal of MicroDentistry
Inaugural Issue 2009
Volume 1 , Issue 1

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Study of Surface Roughness and Marginal Fit Using A Newly Developed Microfinishing Bur and New Preparation Technique

Tetsuya Hirata, DDS, PhD/Takashi Nakamura, DDS, PhD/ Kazumichi Wakabayashi, DDS, PhD/Hirofumi Yatani, DDS, PhD

Pages: 61–64

The use of an operating microscope and visual guidance in perio-prosthodontic treatment allows for smoother surface roughness of preparations and superior marginal fit of restorations to abutments. This study examined the surface roughness and marginal fit of preparations carried out using three different techniques: (1) conventional preparation using a superfine diamond bur (Shofu) in which the bur is moved around the tooth surface in a counter­clockwise rotational motion, (2) preparation using the newly developed microfinishing bur (Shizaisha) in the same conventional counterclockwise rotational motion, and (3) preparation using the newly developed microfinishing bur in which the bur is pulled or pushed in only one direction from inside to outside of the shoulder in the same orientation as the enamel rods. The results showed that method 3 provided a significantly smoother surface roughness (Ra: 6.585 µm) and smaller marginal gap (16.165 µm) compared to the other two methods. Int J Microdent 2009;1:61–64

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