What is the orthodontic mini screw?
It is a small metal pin that is inserted through the gums into the jawbone to act as an anchor to help move poorly positioned teeth. Some people also call them “micro-screws”, “mini-implants” or “temporary anchor devices” (TADs).
Why do I need a calendar nail?
In order to move the teeth into a proper position, a small screw can be used to act as an “anchor” to help straighten your teeth and close gaps.
How will the small screw be placed?
A small screw may be placed at any time during brace treatment.
A local anesthetic is used to numb your gums, and you may also be asked to use an antibacterial mouthwash.
A hole may be drilled in the jaw first to insert the screw, or it may be gently inserted directly into the bone.
You may feel a pressure sensation as the screw is inserted.
Sometimes a plastic device is used as a guide to help put the screw in exactly the right position.
The abutment can be secured with the small screw either immediately or at a later visit to start the movement of the teeth.
What are the risks?
There is limited evidence about how well microscrews work but there are no major safety concerns about their use. Success rates are greater than 80%. Microscrews are usually positioned so that they travel between the roots of two teeth. The majority remain stable during brace treatment. Possible risks are:
The screw may touch the root of the tooth while it is being placed. The root should heal without problems.
The screw becomes loose and can usually be replaced in the same position on a subsequent visit or in a different position.
– 5% of screws break during insertion. If this happens, the end of the small screw may be left in the bone.
This should not cause any problems, 15-20% of small screws fail early and need to be replaced or removed.
What if I don’t want to put a small nail in my mouth?
Your orthodontist will explain the different ways to straighten your teeth and close the spaces. Small screws are often used to make your brace treatment as efficient and effective as possible. Alternative options may include wearing a head covering, having a tooth extracted, or accepting spaces between the teeth. Your orthodontist will advise you on the best way to get the result you want. The final decision is yours.
How long will the small nail stay in my mouth?
The mini screw will usually be in place for several months while the teeth are moved into a better position. Once the movement of the teeth is complete, the pins are ejected.
