(Objective) This case report illustrates the case of an adult patient presenting with maxillary protrusion due to skeletal Class II anterior open-bite and mandibular retrusion treated with orthodontic anchor screws.
(Case) A female patient 23 years 0 month of age who visited the our hospital with the chief complaints of open-bite and maxillary protrusion, she declined surgical orthodontic treatment. The patient has convex-type facial profile. Molar relationship was Angle Class II division 1 with an overjet of ＋9.0 mm; overbite was −4.5 mm. Lateral cephalometric radiographic findings revealed ANB 8.8°and mandibular clockwise rotation at a high angle. The initial treatment plan was to perform intrusion and distalization of the upper molars using a transpalatal arch and a high pull headgear, extraction of upper and lower first bicuspids. However, it was difficult for her to secure time to wear a headgear. Therefore, the headgear option was replaced with a treatment option utilizing anchor screws for anchorage. The orthodontic anchor screws were embedded on the buccal side between the second bicuspid and the first molar and in the midpalatal suture.
(Discussion and Summary)
Using orthodontic anchor screws, maxillary protrusion was improved by the distal movement of maxillary dentition, and intrusion of the upper molar was performed to enhance counterclockwise rotation of the mandible. The patient is satisfied with the treatment results and facial changes. The use of orthodontic anchor screw may be useful in patients who cannot secure time to wear an extra oral anchorage.