16. Occlusion and Malocclusion
Angle’s class I occlusion: incisor relationship.
A. Normal horizontal alignment has the incisal edge of the maxillary
incisors anterior to the incisal edge of the mandibular incisors,
also known as normal overjet (denoted by the horizontal
arrow). B. Normal vertical alignment has the incisal edge of the
maxillary incisors overlapping (hiding from view) the incisal third
of the mandibular incisor, also known as normal overbite
(denoted by the vertical arrow).