Research Article

Mechanical Degradation of Different Classes of Composite Resins Aged in Water, Air, and Oil

Table 6

Mean, standard error, and critical value as measured by the Tukey test for hardness values of the interaction between “storage medium” and “time” of SBCR group (VHN).

24 hours30 days60 days90 days120 days

AIR47.1 (a)  
A
45.5 (a)   
A
45.3 (a)   
A
45.6 (a)   
A
45.6 (a)   
A
WATER44.2 (a)   
AB
43.8 (a)   
AB
46.9 (a)   
A
45.7 (a)  
A
45.6 (a)   
A
MINERAL OIL35.9 (a)   
B
35.3 (a)   
B
34.8 (a)   
B
34.9 (a)   
B
34.7 (a)   
B
standard error = 1.79

Critical value of 5% = 8.94. Horizontal, lowercase letters (same material, different storage conditions). Vertical, capital letters (same storage condition, different materials).