CASE STUDY Figure 9 Figure 12 Figure 13 Figure 14 Figure 10 Figure 11 The mandible overall length is normal (Bottom Line Point-BLP 7), and the mandible position is slightly anterior as CG is 4 mm ahead of the Posterior Arc (BLP 7 and 8). This bodes well for the patient to not develop any TM problems (BLP 7 and 8) during treatment. The existing skeletal vertical dimension is slightly open as the mandible is slightly below the age-related blue arc (BLP 3) (Fig. 13). Growth direction is mildly clockwise (Fig. 14) as the UGA is 50° (norm is 52°-55°) and the LGA is 76° (norm is 70°-75°) (BLP 9). Care must be taken as whatever treatment is prescribed that the exist-ing skeletal vertical dimension does not increase. To monitor this during the treatment, I use a verticorder (Fig. 15) at each appointment. The verticorder is placed on the bridge of the patient’s nose and the bottom of the chin when the patient is occlud-ing and the Skeletal Vertical Dimen-sion-SVD is recorded. If the SVD remains constant at each appoint-ment, then it is being controlled. If the SVD is increasing, then steps must be taken to return the SVD back to normal (Fig. 16-A). Restoring proper SVD once it’s out of control www.orthodontics.com Winter 2024 25
Journal of the American Orthodontic Society JAOS Winter 2024: Page 25
