Open Coil Spring

Design and Construction:

The open coil spring is typically made of stainless steel or nickel-titanium wire, materials known for their durability and flexibility.
The coil is shaped like a spring and is placed over a section of the archwire in the space between two brackets or teeth.
Function:

The primary function of the open coil spring is to create space between two adjacent teeth. It does this by applying light, continuous pressure to separate them gradually.
The spring is typically used in areas where crowding or a need for space is present. It can be placed between teeth that are too close together or in cases where extra space is needed to align or move teeth into their proper positions.
How It Works:

The spring is compressed when first placed, and as it uncoils, it creates space between the teeth. This happens gradually over time, with the spring exerting pressure on the teeth to move them apart.
The open coil spring is effective because it can exert a consistent force over a long period, which is ideal for slowly and evenly creating space.
Types of Forces:

The pressure applied by the open coil spring is gentle and consistent, making it ideal for controlled space creation.
It may be used to expand the arch (widen the upper or lower jaw) or to create room for a permanent tooth to emerge in cases where a primary (baby) tooth has been lost prematurely.