Early loss of primary teeth can allow first molars to drift mesially and block the eruption of the bicuspids. The removable Lower Molar Distalizing Sagittal uses two expansion screws with the acrylic cuts placed just mesial to the molars. By adjusting the expansion screws (1/4 turn once each week), the part of the appliance mesial to the screws acts as an anchor, while the molars are moved distally. When second molars are not yet erupted, it is important to check their position and be certain that first-molar distalization will not create an impaction. This can easily be accomplished by taking an x-ray of the second molars. Note: In some cases, removal of the second molars may be indicated.