Braces Power Chain Before and After: Real Gap Closing Results and Color Staining Test
By Sarah Jenkins
Not every power chain delivers the same tension. Manufacturers classify these elastomeric chains based on the distance between the centers of each adjacent loop: continuous (closed), short, and long.
The specific choice dictates how far the elastomer stretches between brackets, which sets the resting force applied to the teeth. Closed chains link loops directly edge-to-edge without an intermediate connector. Short chains feature a small connecting bar, while long chains provide an extended gap between loops to cover wider inter-bracket spans.
| Chain Configuration | Center-to-Center Distance | Initial Force Delivery | Primary Clinical Indication |
|---|---|---|---|
| Continuous (Closed) Chain | 2.8 mm, 3.0 mm | High (300, 450 cN) | Anterior space closure, rapid diastema consolidation |
| Short Spacing | 3.5 mm, 3.8 mm | Moderate (200, 300 cN) | Premolar-to-canine retraction, moderate quadrant spaces |
| Long Spacing | 4.0 mm, 4.5 mm | Gentle (150, 220 cN) | Wide inter-bracket spans, large adult arches, molar engagement |
Using a continuous closed chain over a broad molar span can exert excessive traction, leading to bracket debonding or patient discomfort. Conversely, using long spacing over crowded lower incisors fails to produce enough tension to close remaining gaps.
Sarah Jenkins is a veteran tech journalist with over 12 years of experience covering artificial intelligence, mobile innovations, and digital ethics. Her insights have appeared in leading technology publications worldwide.
