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KMID : 0362220100370040305
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Journal of The Korean Research Society for Dental Materials
2010 Volume.37 No. 4 p.305 ~ p.312
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Comparative Fit of 3-unit Bridge Wax Patterns Fabricated by Manual and CAD-CAM Techniques
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Kim Si-Chul
Bae Ji-Young
Lee Hae-Hyoung
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Abstract
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The purpose of this study was to compare the marginal and internal fit of 3-unit bridge wax patterns fabricated
by manual wax-up or CAD-CAM techniques. A three-unit bridge model was prepared with die stone and
two types of margin, knife and chamfer were applied to the abutment teeth. The fit of wax patterns was measured
from mesiodistally sectioned of bridge model with wax patten by microscopic examination. Gap dimensions of
wax patterns prepared in this study were <100 ㎛, which were within clinically acceptable level, except for occlusal
gap of CAD-CAM wax pattern. Wax patters with knife margin produced better adaption accuracy than does
those with chamfer margin. Axial gap adaption was very good regardless of margin type. Overall, the level of accuracy
of wax pattern produced by manual technique was better than that of CAD-CAM technique.
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KEYWORD
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Fit, Wax pattern, Manual wax-up, CAD-CAM, Bridge
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