Use of the intraosseous screw for unilateral upper molar distalization and found well balanced occlusion

A 13-year-old male who have an impacted premolar is presented with skeletal Class I and dental Class 2 relationship. The screw was placed and immediately loaded to distalize the left upper first and second molar. The average distalization time to achieve an overcorrected Class I molar relationship was 3.6 months. There was no change in overjet, overbite, or mandibular plane angle measurements. Mild protrusion (0.5 mm) of the upper left central incisor was also recorded.Immediately loaded intraosseous screw-supported anchorage unit was successful in achieving sufficient unilateral molar distalization without anchorage loss. This treatment procedure was an alternative treatment to the extraction therapy.In the treatment of Angle Class II malocclusions, with well-aligned lower teeth and a mandible in sagitally normal position, upper anterior crowding and excessive overjet can be treated with either distalization or extraction of upper posterior teeth. Newly developed orthodontic mechanics and their ease of application enabled widespread use of nonextraction therapies[1].Conventional extraoral appliances are usually used for supporting maxillary molar anchorage or for distalization purposes. However, patient cooperation is a serious problem that has to be dealt with and moreover, orthodontic mechanics requiring minimal patient cooperation are desirable [2,3]. A number of treatment protocols that minimize the need for patient compliance have been suggested previously [4-12]. These techniques effectively distalize the maxillary molars, however, in most of these studies anchorage loss is unavoidable characterized by maxillary incisor protrusion, an increase in overjet, and decrease in overbite [6,7,11].In recent years, studies have been directed toward the use of osseointegrated implants [3,12-14], onplants [15], and intraosseous screws [1] as anchorage units in orthodontic patients.Use of intraosseous screws for temporary orthodontic anchorage devices is a new area of res