Maino, Bednar, Pagin, and Mura
BC Fig. 14 Case 2. A. After retraction. B. Removal of Spider Screw. C. Final prosthetic reconstruction.
right lateral incisor was rotated and had a carious lesion on the mesial side.
Adequate anchorage to retract the upper right first premolar and canine with a segmented approach could not be provided by the second molar alone. Therefore, the bridge was removed, and a Spider Screw was inserted into the edentu- lous ridge at the level of the second premolar (Fig. 12). The miniscrew served as the mesial abutment for a new temporary bridge (Fig. 13).
Brackets were bonded in the maxillary arch, and an .016" .022" segmental archwire was placed. The upper right first premolar and canine were retracted with 150g elastic forces
applied to their buccal and lingual surfaces (Fig. 14). The upper right lateral incisor was rotated into proper alignment. The Spider Screw was then removed, and a final prosthetic restoration was made.
This 45-year-old female’s upper midline was deviated to the right, with anterior spacing (Fig. 15). Both upper first molars were missing, and the upper second molars were tipped mesial- ly. She had a Class I canine relationship on the left and a Class III tendency on the right.
Fig. 15 Case 3. 45-year-old female with upper midline deviation and anterior spacing before treatment. Arrows show desired tooth movements.
VOLUME XXXVII NUMBER 2