Resin Common beverages Period
Inital  After 7 days After 14 days After 21 days
Adoro Saliva 43.00 (3.13) Aa 42.13 (4.08) Aa 39.24 (4.75) Aa 38.70 (4.49) Aa
  Coke 42.73 (2.57) Aa 39.33 (1.24) Aab 36.41 (1.92) ABCb 35.87 (2.17) ABCb
  Wine 42.62 (2.40) Aa 39.97 (1.92) Aa 31.79 (1.11) BCb 31.38 (1.67) BCb
  Coffe 43.57 (1.93) Aa 40.28 (2.10) Aa 33.88 (1.20) Bb 33.16 (1.19) Bb
  Juice 42.59 (2.22) Aa 40.84 (3.20) Aa 38.43 (1.31) ABa 37.85 (1.11) ABa
Resilab Saliva 42.08 (3.57) Aa 28.94 (3.50) Ab 28.45 (4.48) ABb 24.82 (3.30) Ab
  Coke 42.25 (2.25) Aa 31.17 (3.71) ABb 28.24 (4.92) Abc 25.61 (4.34) Ac
  Wine 42.28 (2.72) Aa 29.61 (3.97) Ab 29.97 (3.75) ABb 28.38 (3.51) Ab
  Coffe 42.66 (2.69) Aa 29.24 (3.44) Ab 28.43 (2.20) ABb 26.16 (2.96) Ab
  Juice 44.58 (3.56) Aa 34.89 (5.63) Bb 33.12 (6.13) Bbc 28.54 (3.47) Ac
Cristobol Saliva 48.82 (1.97) Aa 46.07 (1.38) Aab 43.83 (1.41) Ab 41.56 (1.62) Ab
  Coke 48.36 (1.08) Aa 42.81 (0.60) ABb 39.43 (1.05) ABb 38.28 (0.60) Ab
  Wine 47.82 (1.04) Aa 44.37 (1.94) Aab 42.95 (2.16) Ab 42.24 (2.60) Ab
  Coffe 47.92 (0.38) Aa 39.19 (0.37) Bb 37.80 (0.55) Bb 39.16 (1.84) Ab
  Juice 48.26 (0.48) Aa 43.42 (1.29) ABb 40.32 (1.34) ABb 39.42 (1.97) Ab
Sinfony Saliva 21.15 (3.79) Aa 13.65 (3.98) Ab 12.35 (2.86) Ab 11.37 (3.67) Ab
  Coke 20.16 (1.73) Aa 15.28 (2.08) Ab 13.83 (2.33) Ab 13.72 (2.54) Ab
  Wine 20.76 (1.16) Aa 14.87 (2.36) Ab 13.36 (2.65) Ab 12.91 (2.66) Ab
  Coffe 19.99 (1.49) Aa 13.56 (1.53) Ab 13.50 (1.51) Ab 12.05 (1.56) Ab
  Juice 20.05 (0.91) Aa 13.62 (1.18) Ab 12.33 (1.30) Ab 11.11 (2.48) Ab
Epricord Saliva 38.96 (0.82) Aa 34.95 (0.82) Aab 34.71 (1.60) Aab 33.10 (0.79) ABb
  Coke 40.24 (1.38) Aa 34.16 (2.15) Ab 32.12 (2.84) Ab 31.03 (2.66) ABb
  Wine 39.38 (0.95) Aa 34.82 (2.25) Aab 34.02 (2.18) Ab 35.85 (1.80) Aab
  Coffe 40.70 (0.73) Aa 35.36 (1.20) Ab 34.71 (1.27) Ab 33.97 (0.94) ABb
  Juice 39.62 (0.29) Aa 34.19 (1.91) Ab 32.07 (1.54) Ab 30.61 (1.80) Bb
Means followed by the same uppercase letter in the column (comparison of each resin brand) and the same lowercase letter in the line does not differ to 5% level of significance (P<.05) in Tukey’s test.
Table 3: Mean results (Standard Deviation) of Knoop hardness of indirect composite resins for common beverages.