From: Retention strength of monolithic zirconia crowns cemented with different primer-cement systems
 | Retentive load (N) | Surface area (mm2) | Retention strength (MPa) |
---|---|---|---|
Group M | 422.00 ± 78.48A | 155.61 ± 16.28 | 2.71 ± 0.45C |
Group P | 390.95 ± 50.43B | 158.10 ± 13.91 | 2.47 ± 0.41D |
Group D | 216.85 ± 67.44A,B | 152.91 ± 8.76 | 1.42 ± 0.23C,D |