Skip to main content
Maxillofacial Plastic and Reconstructive Surgery
Fig. 2 | Maxillofacial Plastic and Reconstructive Surgery

Fig. 2

From: Comparison between anterior segmental osteotomy versus conventional orthodontic treatment in root resorption: a radiographic study using cone-beam computed tomography

Fig. 2

Landmarks: S: sella, N: nasion, U: upper incisor tip, L: lower incisor tip, VRL, HRL, incisor angle, AP position. Horizontal reference line (HRL): a line drawn 7° clockwise from the sella-nasion line with sella as the center. Vertical reference line (VRL): a line perpendicular to the HRL through the sella. Tooth length: distance from upper or lower incisor tip to apex. Incisal angle: an angle between U1 or L1 line (line through with tip and apex of central upper incisor) with HRL. AP position: distance from upper or lower incisor tip to VRL

Back to article page