The function of the “O” ring is to create an “organic” tension to the activation screw head so the patient does not turn the head with their tongue. If this “O” ring is hit with the soldering gun during fabrication, it may be compromised and should be replaced.
Yes, each VECS includes 1 blue handled activation key.
It is possible for food to get lodged into the activation head. A toothpick is a good tool to clean out the activation head.
It is virtually impossible for the VECS to creep back on itself after activation. The gear inside the housing is a worm-gear, similar to the concept of the axle of a car. The pressure is not great enough to creep back on this device.
The right and left expansion plates extend in a symmetrical fashion, however the center body may slightly move side to side giving the false impression that one side is expanding greater than the other.
The key is designed with a target symbol on 1 side and blank on the other. By pushing on the side of the key with the target symbol, this ensures the device is being activated the proper direction.
0.2mm per one 360 degree rotation
