Variety SP Mini-8 Expansion Screw Straight 8.0mm

Laboratory orthodontic expansion screw designed for fixed treatment of misalignment in the lower jaw, including distalization, mesialization, and gap closure by moving individual teeth. Also suitable for early palatal expansion in the upper jaw, particularly for very narrow jaws. Features break-resistant retention arms with stable guidance throughout the expansion path, screw lock preventing independent rotation back, and clear directional arrow and maximum expansion path marked on the screw body. Technical specifications include 9.6mm screw body, 12.9mm installation dimension, 8.0mm maximum expansion (4 x 1/4 turns = 0.80mm), and stainless steel construction. Package contains 1 piece with 1 safety key.