- The 4F Disjunction Device is positioned on the patient's palate and skeletally anchored using four HS MARPE mini-implants, which are inserted through the through-holes in the device.
- The 4F Circuit Breaker differs from the SL Circuit Breaker in that it features through-holes. for HS MARPE mini-implants instead of slots, which provides greater precision during placement and in digital planning.
- Recommended for adolescents, young adults, and adults with moderate atresia.
- It comes with a circuit breaker expansion wrench.
- Made of stainless steel.
- Autoclavable.

| Code | Model | Closed (A) | Open (B) | Length (C) | Possible longitudinal distances between mini-implants (D) | Transverse distance between mini-implants (E) | Number of activations |
|---|---|---|---|---|---|---|---|
| 5591 | 9mm | 15 mm | 20 mm | 16.5 mm | 12.3 mm | 5.6 mm | 45 activations |
| 5592 | 11 mm | 17 mm | 22 mm | 55 activations |










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