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3 Pre‐carving Preparation of Wax Blocks

LEARNING OBJECTIVE

The student will be able to assess the condition of the wax block and perform preparation steps before the actual carving steps.

Smoothing the Wax Surface

Wax block obtained from the manufacturers will have irregularities, air spaces, or voids (Figure 3.1). These are created due to low filler content or entrapment of air during pouring into and hardening of the wax in the mould [1]. The wax surface should be smoothed before carving [2, 3]. Use the non‐cutting edge of the carver in a single direction (Figure 3.2) to smooth surfaces (Figures 3.3 and 3.4)

Figures 3.1–3.4 Technique to smooth wax block surface before the carving step sequence.

Figures 3.5–3.8 Sequence of steps to divide the wax blocks before the actual carving steps.

Division of Wax Block

Divide each end of the wax block into four equal parts. Taking the guidance of the cross lines at the ends divide each side of the wax block into two equal parts. The midline drawn on the wax block would help in placing the incisal edge of a tooth either buccally or lingually or in the centre to the long axis (the midline drawn), depending on the tooth (Figures 3.5–3.8).

References

1 1 Widjijono, Purwanto, A., and Dyah, I. (2009). Mechanical properties of carving wax with various Ca‐bentolite filter composition. Dental Journal 42 (3): 114–117.

2 2 Linek, H.A. (1949). Tooth Carving Manual, 1e. Long Island City, NY: Columbia Dentoform Corporation.

3 3 Rashmi, G.S. (2014). Textbook of Dental Anatomy, Physiology and Occlusion, 1e. New Delhi: Jaypee Brothers Medical Publishers Ltd.