The Ness Visual Dictionary of Dental Technology
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| Term | sprue former |
| Variations | crucible former, sprue base |
| Definition | A conical or cylindrical plastic or metal base which holds the sprues upright in the casting ring during investing. It forms a funnel in the investment to guide the molten material into the mold during casting. |
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sprue former
Term of the day: modified T-bar clasp
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