Aesthetic Value of the Relationship between the Shapes of the Face and Permanent Upper Central Incisor
Figure 1
Measurements carried out to compare face and central incisors. Face: FH – face height, distance between nasion point (N) and menton base (M). FW1: maximum width of face, distance between right lateral tangent (RT) and left lateral tangent (LT). FW2: width of lower portion of face, at the height of the labial rima. Fa: angle determined by the tangent to the upper lateral face contour (ULT) and bi-pupillary line (BL). Fb: angle between the tangent to lateral lower contour (ILT) and the continuation of the line that determines FW2. Fab: angle formed by intersection of ULT and ILT. Incisor: TH: tooth height determined by the distance between the incisal tangent (IT) and the cervical tangent (CT). TW1: largest width of the incisor, distance between mesial tangent (MT) and distal tangent (DT). TW2: width of cervical third at the height of the limit of 1/3 of TH. Ta: angle determined by the tangent to the distal inciso-cervical contour (CIT) and by a virtual line parallel to the horizontal plane. Tb: angle formed by the tangent to the lateral cervical contour (CLT) and by the continuation of the line that determines TW2. Tab: angle formed by the intersection of CIT and CLT.
