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치과 주조공정의 수축 및 팽창에 관한 연구

A study of shrinkage and expansion for dental casting process

대한치과기공학회지 2020년 42권 2호 p.107 ~ 112
김영훈,
소속 상세정보
김영훈 ( Kim Yung-Hoon ) - Wonkwang Health Science University Department of Dental Laboratory Technology

Abstract


Purpose: This study compares how accurately the specimen produced by the machining method and the rapid prototyping method is produced and how much dimensional error occurs with the finished casting body, and presents the results as experimental comparative data.

Methods: Specimens produced using a digital processing method were cast by a conventional dental casting process, and dimensional changes of the finished casting body were measured to compare shrinkage and expansion.

Results: In the control group that did not artificially induce large swelling, the dimensional error was the smallest, and the shrinkage and expansion reactions cannot be elimainated in all processes.

Conclusion: The shrinkage and expansion depend on the given conditions, so if there is a change in the traditional dental casting process, it is necessary to adjust all the parameters to obtain an accurate casting body.

키워드

CAD/CAM; Casting; Expansion; Investment; Machining; Shrinkage

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