The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?
(A) 19
(B) 20
(C) 21
(D) 26
The American dental association (ADA) specification number for non-aqueous elastomeric dental impression material is______________?
(A) 19
(B) 20
(C) 21
(D) 26
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