From: Comparison of retention and fracture load of endocrowns made from zirconia and zirconium lithium silicate after aging: an in vitro study
Group
Mean
Standard deviation
Minimum
Maximum
P value
Retention (N) (n = 14)
 Zr
271.50
114.31
104.71
490.22
0.012
 ZLS
654.67
223.17
222.74
1006.25