Final answer:
Elastic chains are orthodontic devices used to close spaces between teeth, involving continuous force to align teeth.
Step-by-step explanation:
When it comes to orthodontic devices and techniques used to close spaces between teeth, elastic chains are commonly utilized. Elastomeric ligatures and wire ties are typically used to hold the archwire in place on each bracket, while comfort tubing is applied to cover parts of the braces to provide comfort and prevent irritation of the cheeks or lips. Elastic chains are segments of connected elastomeric rings that are stretched over brackets and provide a continuous force needed to close gaps and align the teeth over time.