Figure 8
Changes from one year to 5 years after mandibular advancement: a, the percentage of patients with changes in the horizontal position of landmarks; b, the percentage with changes in vertical position. Points B and Pg are as likely to move forward as backward long-term. Beyond one year postsurgery, one-third of the patients continue to experience backward and upward movement of gonion, indicating a loss of bone at the gonial angle as remodeling continues, but 20% have a net gain.