Influence of Restorative Materials on Color of Implant-Supported Single Crowns in Esthetic Zone: A Spectrophotometric Evaluation

Table 1

Materials of abutments and crown copings.

Abutment
z	Zirconia
t	Titanium
g	Gold alloy: cast-to abutment (Astra Tech): Au 60%, Pt 19%, Pd 20%, Ir 1%, or gold-hue titanium
Veneering	IPS Empress 2: apatite glass-ceramic (Ivoclar Vivadent)
	IPS d.SIGN: fluorapatite leucite glass-ceramic (Ivoclar Vivadent, Schaan, Liechtenstein)
Crown coping
z	Procera Zirconia: yttria-stabilized tetragonal zirconia polycrystal,; Y-TZP (Nobel Biocare™, Gothenburg, Sweden)
m	ORION WX: gold alloy, AU 52.0%, Pd 38.0%, In 8.2%, Ga 1.6%, and Ag and Re < 1% (Elephant Dental BV, Hoorn, Netherlands)