Table 1 The blocks tested in the study

VITA Mark II

VIT

2M2C-16,630

Feldspathic glass-matrix ceramic

VITA Zahnfabrik, Germany

56–64% SiO_2,

20–23% Al₂O_3,

6–9% Na₂O,

6–8% K₂O

Veneers, inlays, onlays, anterior and posterior crowns.

IPS Empress CAD

EMP

HT A2-N74772

Leucite based glass-matrix ceramic

Ivoclar Vivadent AG, Liechtenstein

64.9% SiO₂,

16.25% Al₂O₃,

11.85% K₂O,

5.37% Na₂O,

1.56% CaO

Veneers, inlays, onlays, anterior and posterior crowns.

IPS e.max CAD

MAX

HT A2-L02944

Lithium disilicate based glass-matrix ceramic

Ivoclar Vivadent AG, Liechtenstein

58–80% SiO₂,

11–19% Li₂O,

0–13% K₂O,

0–8% ZrO₂

0–5% Al₂O_3,

Veneers, inlays, onlays, anterior and posterior crowns, anterior and posterior implant abutments, three-unit bridges up to premolars.

Lava Ultimate

ULT

A2 HT-N420014

Resin Nanoceramic

3 M ESPE,

USA

80% inorganic

(69% SiO₂,

31% ZrO₂)

20% organic

Veneers, inlays, onlays.

Vita Enamic

ENA

2 M2 HT-59620

Hybrid ceramic

VITA Zahnfabrik, Germany

86% inorganic

(58–63% SiO₂,

20–23% Al₂O₃,

9–11% Na₂O,

4–6% K₂O,

0.1% ZrO₂)

14% organic

Veneers, inlays, onlays, anterior and posterior crowns.