Medium sectional screw for space closing and single tooth movement. Sturdy U-bow serves as a double-guiding pin. Yellow directional arrow

U-bow is gingivally bent for single tooth movement. Yellow directional arrow

U-bow is gingivally bent for single tooth movement. Yellow directional arrow

U-bow is gingivally bent for single tooth movement. Yellow directional arrow

U-bow is gingivally bent for single tooth movement. Yellow directional arrow

Medium sectional screw for space closing and single tooth movement. Sturdy U-bow serves as a double-guiding pin. Yellow directional arrow

Medium sectional screw for space closing and single tooth movement. Sturdy U-bow serves as a double-guiding pin. Yellow directional arrow

U-bow is gingivally bent for single tooth movement. Yellow directional arrow

U-bow is gingivally bent for single tooth movement. Yellow directional arrow

Stable expansion screw for the mandible. Two retention holes and yellow directional arrow