The vertical component of PIP in Class II treatment

The Arnett analysis quantifies the vertical positioning of upper incisors, and requires an overbite of 3mm, with upper incisor exposure being 4mm below the relaxed upper lip in males and 5mm in females (Fig. 7.14).

Orthodontic cephalometry has not provided clear goals for vertical positioning of the upper incisors. The high lip-line is a contributor)' factor in Class 11/2 malocclusions, and there is an acknowledged need to procline and intrude upper incisors in such cases, to assist in stabilitv.

Male 4mm Female 5mm lip exposure

Fig. 7.14 Conventional orthodontic analysis does not provide clear goals for vertical upper incisor position. In contrast, the Arnett analysis quantifies incisor overbite and incisor exposure, with lips at rest.

Male 4mm Female 5mm lip exposure

Fig. 7.14 Conventional orthodontic analysis does not provide clear goals for vertical upper incisor position. In contrast, the Arnett analysis quantifies incisor overbite and incisor exposure, with lips at rest.

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