Table 2. Group codes of control and copolymer resin specimens.

Control groups	Copolymer groups
	5% copolymer	10% copolymer	15% copolymer	20% copolymer
QC-20 (QC-c)	Qc-5	Qc-10	Qc-15	Qc-20
Acron MC (Ac-c)	Ac-5	Ac-10	Ac-15	Ac-20