If you have braces, you might eventually hear your orthodontist mention adding a “power chain.” Unlike individual colored O-rings that hold the archwire to each bracket separately, power chains are a continuous strand of connected elastic rings. Their primary purpose is to apply continuous, uniform tension to close gaps or rotate stubborn teeth.

However, not all power chains are identical. They come in different spacing styles—typically categorized as continuous (closed), short, and long. Understanding the differences between these types helps demystify how your orthodontist is moving your smile.

On a continuous or closed power chain, the elastic loops are joined directly to one another without any space or bridge between them.

Short power chains feature a very tiny link of elastic material separating each ring.

Long power chains have a much larger, more noticeable filament or bridge of elastic connecting each ring.

Selecting the right spacing is not random. If an orthodontist uses a continuous chain on large teeth with wide brackets, the elastic will stretch too much, creating excessive force that can damage the roots. Conversely, a long chain on small teeth will be too loose to exert any useful movement.

Proper chain selection ensures your teeth move safely, efficiently, and comfortably toward your final results.