| http://www.w3.org/ns/prov#value | - Minimal expansion may compensate for dimensional changes that are inherent in the fabrication of cast metal restoration.3 Owing to several disadvantages of gypsum die material, such as low strength and poor abrasion resistance, other materials and techniques are widely devised and propagated.4 Silver and copper electroplated die systems are accurate, abrasion resistant and nonabsorbent.5,6 However
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