Page 27 - COS-FOD2015
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NZarina et al.
Figure 1: Various types of tooth preparation margins
(a) Knife-edge (c) Chamfer (e) Beveled shoulder
Materials and Method and U-shaped grooves of 1mm (U 1 and V 1) and
2mm (V 2 and U 2) in depth was machined using
The materials included in the study are shown
CAD-CAM system (Micromachine DT110, Mi-
in Table 1 and were used according to their
crotools PTE LTD, Singapore) incorporating
manufacturer's instructions.
three reference points of 2.5 mm apart (L1, L2,
Preparation of reference block and master and L3) and a shoulder of 3 mm in height and
dies width was also added to aid in the measure-
ment and impression making respectively
An aluminium master block, 21 mm thick and
(Figure 2).
measuring 40 mm in diameter, incorporating V
Figure 2: Calibrated grooves on aluminum block
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