Fig. 4 Fig. 6 Fig. 5 Fig. 7 occlusal to the center of resistance of the maxillary first molar. Mild distalization of the tooth and distal rotation of the crown occurs. Once the force is removed, the crown will upright over the roots and any perceived distalization of the tooth will not have occurred (Fig. 4B). b Palatal bone anchorage is used (Figs. 7B,C). There-fore, untoward side effects of Class II elastics such as tipping of the frontal occlusal plane downward induc-ing a gummy smile, canting of the frontal occlusal plane, labial dumping of mandibular incisors and other negative effects are eliminated. b These appliances are heavy lifters in that the forces required to bodily move molars are possible. What are the components of the Newby/Anderson Distalizer? The components are shown in Fig. 5. Have the labo-ratory fabricate the C-shaped tube assembly such that the connecting appliance arm is at the level of the center of resistance of the first molar in the sagittal plane. Make sure that the appliance arms have distal extensions that are sufficiently long enough to allow for the necessary distalization to be completed. The Newby/Anderson Distalizer is fabricated by Jerry Ander-son of Anderson Orthodontics in Wichita, Kansas. 1 The palatal plate may be placed either vertically or horizontally (rare). I determine the orientation based on the anatomy of the palate and the age of the patient. If the patient is in the late mixed dentition, I will generally use the vertical orientation of the palatal plate (Fig. 3B,C). If the patient is an adult, I may consider a horizontal orientation of the palatal plate if the anatomy of the palate allows for it and if the midpalatal suture is very dense making it difficult to place TADs. The TADs I use to secure the appliance to the palate are BENEFIT Orthodontic Screws (Fig. 6). 6 Placement of the Newby/Anderson Distalizer and the BENEFIT Orthodontic Screws (TADs): ᕡ Cement the appliance on the maxillary first molars. ᕢ Use an implant torque wrench with the long www.orthodontics.com Winter 2017 9
Journal of the American Orthodontic Society Winter 2017: Page 9
