they are constructed points, so it was not necessary to draw anatomical structures, which are usually operator-dependent, thus allowing bias control during the study; these points were: labrale superius (Ls), labrale inferius (Li), subnasale (Sn), glabella (G'), columella (Cm), menton (Me), pogonion (Pg'), stomion superius (Stms), stomion inferius (Stmi), and lower vermilion (Vmi).
01) were found in the dispersion between the conventional and direct digital images, with higher levels of significance in labrale inferius (p = 0.
Another finding of the present study indicates that in digital radiography labrale superius, labrale inferius, and lower vermilion presented interobserver error values greater than 1 mm, but with no significant differences compared to conventional imaging, suggesting that the lower vermilion was more difficult to locate because two-dimensional radiographic imaging does not clearly show where the lower lip ends.
In terms of Euclidean distance, labrale inferius and stomion superius were more reproducible in digital imaging, which was more precise and accurate.
1 7 lower lip margin undefined in referenced text * 13-li labrale inferius
undefined in referenced text * ll labrale inferius
undefined in referenced text * ld infradentale apex of the alveolus in the midline between the mandibular central incisors 13 lower lip undefined in referenced text * lr12 midlower-lip point on the maximum margin labial curvature of the most anteriorly placed lower central incisor or12 lateral lower-lip maximum labial curvature margin of the crown of the mandibular canine 12 subcanine lower lip, lined up superiorly/inferiorly with lateral edge of nose 7.