A posterior articulation joint features expansion arms oriented onwards to get an arc of circle basal expansion. The use of such expander is indicated when anterior transversal deficiencies on the maxillary arch occur, while the posterior diameter is correct.

• Delivers symmetric forces
• Laser engraved numbering
• Laser welded arms
• 9.0mm

Body: ¾” x 5/16″, arm: 1 1/8″

Package includes: 1x expander, 2x activation keys & 1x safety leash