Table 2. Mean, standard deviation, and the summary of the two-factor ANOVA of the angular deviation of the neck during the cavity preparations and restorations, according to magnification level used.

Tooth	Magnification level
	Naked Eye	Galilean 2.5×	Galilean 3.0×	Galilean 3.5×	Total
Cavity preparation
16	48.84 ± 5.48	40.19 ± 5.02	35.54 ± 5.49	33.40 ± 5.72	39.49 ± 7.99a
26	48.82 ± 5.81	37.21 ± 6.42	33.41 ± 5.09	33.15 ± 5.43	38.15 ± 8.51a
36	43.76 ± 5.67	33.05 ± 5.79	29.27 ± 5.82	30.39 ± 6.74	34.12 ± 8.26b
46	45.60 ± 5.64	30.25 ± 6.71	30.17 ± 5.53	27.94 ± 5.82	33.49 ± 9.18b
TOTAL	46.76 ± 5.96A	35.18 ± 7.04B	32.10 ± 5.95C	31.22 ± 6.25C	36.31 ± 8.84
Restoration
16	56.05 ± 8.27	37.20 ± 5.14	37.17 ± 5.13	38.66 ± 4.99	42.27 ± 9.98a
26	55.42 ± 5.70	39.11 ± 4.90	37.55 ± 4.79	39.92 ± 5.33	43.00 ± 8.87a
36	41.22 ± 9.28	27.04 ± 4.81	27.11 ± 3.40	27.99 ± 6.04	30.84 ± 8.62b
46	40.45 ± 8.12	27.21 ± 4.22	27.36 ± 5.54	25.94 ± 4.34	30.24 ± 8.22b
Total	48.29 ± 10.83A	32.64 ± 7.30B	32.30 ± 6.93B	33.13 ± 8.08B	36.59 ± 10.78

Notes:

Two-Factor ANOVA (cavity preparations): magnification level (F = 122.869, p < 0.001, ηp² = 0.548, π = 1.00), tooth (F = 20.939, p < 0.001, ηp² = 0.171, π = 1.00), magnification level vs tooth (F = 1.138, p = 0.335, ηp² = 0.033, π = 0.562). Tukey’s post-hoc test*; two-factor ANOVA (restoration): magnification level (F = 143.220, p < 0.01, ηp² = 0.586, π = 1.00), tooth (F = 114.952, p < 0.01, ηp² = 0.531, π = 1.00), magnification level vs tooth (F = 1.076, p = 0.380, ηp² = 0.031, π = 0.533), the Games-Howell post-hoc test*.

* A capital letter for columns; a lower case for lines; the same letter indicates statistical similarity.