Elastics
Small rubber bands worn by orthodontic patients between hooks on the upper and lower fixed appliances to apply inter-arch forces that correct jaw and bite relationships.
Full Definition
Orthodontic elastics (also called inter-arch elastics or rubber bands) are small latex or non-latex rings that patients attach between specific points on the upper and lower archwire systems. They are used to correct antero-posterior discrepancies (Class II or Class III), close open bites, or assist in space closure. Elastics are described by their direction of pull (e.g. Class II, Class III, vertical, triangular) and their force value (measured in ounces or grams). Patient compliance is essential for their effectiveness. Editors must note that 'elastics' in this context is distinct from 'elastic ligatures' or 'O-rings', which secure the archwire to brackets.
Usage
Usage note: Distinguish clearly between 'elastics' (inter-arch rubber bands) and 'elastic ligatures' (the small O-rings used to tie archwires). Specify direction (Class II, Class III, vertical, etc.) and force value for precision.
In Context
- "Class II elastics were prescribed from the upper canine hook to the lower first molar hook." — Clinical instruction note
- "The patient was non-compliant with elastics wear, which impacted the rate of overjet reduction." — Progress review note