Orthodontic palatal and jaw expansion device that can be easily attached to/detached from inside the mouth

1. A palatal and jaw expansion device comprising at least one screw, at least two blocks that are positioned on the screw so as to move on the screw, at least one stabilization rod whereon the blocks are seated, comprising a movement mechanism disposed at a center of the screw and an arm that has a fixed end fixed to the movement mechanism perpendicularly to a horizontal axis where the screw extends and a free end, and that, when force is applied on the free end, the movement mechanism whereon the arm is fixed and the screw can be rotated around the horizontal axis where the screw extends, enabling the blocks to move on the screw, wherein a first gearwheel is disposed on the movement mechanism, whereon teeth in various profiles are bored, whereto the arm is fixed and that rotates on the screw around the horizontal axis by movement of the arm, and a second gearwheel that is fixed on the screw, that completely contacts the first gearwheel so as to shift to an active position by the movement of the first gearwheel, and whereon teeth in matching form with the teeth on the first gearwheel are bored, wherein a first set and a second set are disposed on the screw and that limit the movement of the first and second gearwheels from both sides, and wherein at least one pushing member is disposed between the first gearwheel and the first set.

2. A palatal and jaw expansion device as in claim 1 , wherein the first and second gearwheels having sawtooth-shaped teeth.

3. A palatal and jaw expansion device as in claim 1 , wherein the first and second gearwheels operate unidirectionally.

4. A palatal and jaw expansion device as in claim 1 , wherein screw threads bored on the screw, which is divided into two sections by the movement mechanism, are in a direction on one side of the movement mechanism and in reverse direction on the other side.

5. A palatal and jaw expansion device as in claim 1 , wherein a spring is used as the pushing member.

6. A palatal and jaw expansion device as in claim 1 , wherein the second gearwheel bears against the second set and the first gearwheel bears against the pushing member that is disposed between the first set and the first gearwheel.

7. A palatal and jaw expansion device as in claim 1 , wherein a stopper that is disposed on the movement mechanism and that enables the second set to stay in its place.

8. A palatal and jaw expansion device as in claim 1 , wherein a claw that is disposed on the movement mechanism that prevents rotation of the arm around the screw freely, and enables the arm to stay in the horizontal position inside the mouth and serves as a stopper.

9. A palatal and jaw expansion device as in claim 1 , wherein the stabilization rod is attached to the blocks in parallel with the screw.

10. A palatal and jaw expansion device as in claim 1 , wherein two protrusions are disposed oppositely on the stabilization rod, and that extend toward the movement mechanism and the screw and provide that the movement mechanism stays on the screw as a whole and prevents sliding of the stabilization rod unilaterally.

11. A palatal and jaw expansion device as in claim 1 , further comprising at least two retainers, each retainer has two ends, wherein one end of each retainer is fixed on a block and wherein the other end of each retainer is either fixed on a molar band or is adapted to be fixed to a tooth (Y) or on a surface of a palate (X) in a detachable manner.

12. A palatal and jaw expansion device as in claim 11 , wherein the retainer is a wire-shaped retainer.