Table 1 Materials used in the present study

IvoBase CAD

IB

Ivoclar Vivadent, Schaan, Liechtenstein

CAD/CAM milling

Prepolymerized PMMA discs

50–100% methyl methacrylate

2.5–10% 1,4-butanediol dimethacrylate

Formlabs

FL

Somerville, MA, USA

3D Printing

55–75% w/w urethane dimethacrylate,

15–25% w/w methacrylate monomers,

and < 0.9% w/w phenyl bis(2,4,6-

trimethylbenzoyl)-phosphine

oxide

Meliodent

MD

Kulzer, Berkshire, Germany

Conventional; heat-polymerized

Powder: Methyl methacrylate, Ethyl hexyl acrylate, N-octyl methacrylate

Liquid: Methyl methacrylate, glycol dimethacrylate, dimethyl p-toluidine