Angle Non-atrophic
mandibles
Atrophic
mandibles
Mean (SD) Mean (SD)
Righta 121.4° (8.17°) 128.9° (7.07°)
Lefta 121.9° (7.29°) 128.96° (6.61°)

aStatistically significant at level P < 0.0001 (t-test).
SD = standard deviation.