Stems

Contact angle (˚)

Group-1

E1 + E3 + E4 + E6

Group-2

E2

Narrow

112.16 ± 10.80

113.28 ± 7.91

Medium

117.8 ± 16.03

127.78 ± 14.33

Wide

126.11 ± 20.8

118.35 ± 12.85