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Author: Site Editor Publish Time: 2026-08-20 Origin: Site
Orthodontic power chains are continuous elastomeric chains used with fixed orthodontic appliances to deliver traction between brackets, hooks, buttons, or other attachment points. Closed, short, and long power chains differ mainly in the length of the connector between adjacent elastic loops.
Under controlled conditions using the same material, cross-sectional dimensions, number of loops, and percentage elongation, the force level generally follows the order of closed, short, and long power chains, from highest to lowest. In clinical practice, orthodontists select an appropriate power chain according to the working span, number of loops, activation, space width, and intended tooth movement.
An orthodontic power chain, also known as an orthodontic elastomeric chain, consists of continuous elastic loops joined by connecting segments. Once the chain is stretched and installed between selected attachment points, the material attempts to return to its original length, creating a continuous tensile force.
This mechanism allows orthodontic power chains to close interdental spaces, consolidate adjacent teeth, retract canines or anterior teeth after extraction, and provide controlled traction between brackets and auxiliary attachments. The specific connection pattern depends on the distance between the attachments and the force system planned by the orthodontist.
Closed, short, and long describe the spacing between adjacent elastic loops. Although these terms are widely used in the orthodontic industry, their exact dimensions are not standardized across manufacturers.
Sino Ortho measures power chain spacing from the center of one loop opening to the center of the adjacent loop opening. This center-to-center distance is also known as the chain pitch.
The elastic loop size remains the same across all three Sino Ortho designs. Their different chain pitches are created primarily by changing the length of the connector between adjacent loops.
Closed 2.8mm
Short 3.5 mm
Long 4.0 mm
Sino Ortho orthodontic power chains are made from thermoplastic polyurethane, commonly known as TPU. The elastic loops and connectors are precision-cut from TPU sheet material rather than produced by injection molding.
The entire power chain is cut as a continuous, one-piece structure, so no secondary joining is required between the loops and connectors. Controlled sheet preparation and cutting dimensions help maintain stable loop openings, connector lengths, edge profiles, and center-to-center spacing throughout each roll.
This manufacturing process supports good dimensional consistency. Stable loop geometry helps the power chain fit brackets and other orthodontic attachments consistently, while controlled connector length clearly differentiates the 2.8 mm, 3.5 mm, and 4.0 mm spacing designs.
TPU sheet thickness also contributes to the cross-sectional dimensions and mechanical properties of the finished orthodontic power chain and is therefore controlled during production. A specific thickness value should only be published after confirmation against the official product specification.
Force Comparison
Segment Activation
Loop Configuration
Space Adaptation
Force Decay
The first step in choosing an orthodontic power chain is to determine the actual working span between the planned attachment points. This may be the distance between adjacent brackets, between a canine bracket and a molar hook, or across an extraction space.
Closed power chain has the most compact unactivated structure and generally produces greater force under the same controlled elongation. Short power chain provides a moderate connector length that can match common bracket spacing. Long power chain is suitable for wider attachment distances or situations in which fewer loops are preferred along the archwire.
The selected power chain should reach the planned attachment points with an appropriate and controllable amount of activation. Closed, short, and long describe power chain geometry; they are not standardized heavy-, medium-, and light-force classifications.
The stage of treatment should also be considered. As a dental space becomes smaller, the original power chain configuration gradually loses activation. Orthodontists may therefore change the segment length, loop count, or spacing type during different stages of the same case.
Product consistency also affects clinical handling. An orthodontic power chain should be easy to identify, cut, stretch, and position, and it should connect securely to the intended brackets or attachments.
Each roll of Sino Ortho orthodontic power chain contains 4.5 meters of material, providing a practical format for daily clinical use, distributor sales, and bulk purchasing.
The product range includes 48 single-color options and 23 two-color combinations. The broad color selection helps orthodontic clinics accommodate different patient preferences, while two-tone power chains provide additional options for markets where colorful orthodontic accessories are popular.
Sino Ortho offers custom packaging, private-label services, and OEM/ODM cooperation for orthodontic distributors, importers, and dental supply brands. Packaging artwork, labels, product identification, and color combinations can be adjusted according to order requirements and target-market needs.
Product samples, color confirmation, volume-based quotations, and bulk-order support are also available.
For product availability, samples, custom packaging, or wholesale orthodontic power chain inquiries, please contact:
Whatsapp：+86 137 5823 5369
E-mail：sales@sinoortho.com
Is Open Power Chain the Same as Short or Long Power Chain?
Is Long Power Chain Always a Light-Force Power Chain?
Are Power Chain Dimensions the Same Across Manufacturers?
[1] Mousavi SM, Mahboobi S, Rakhshan V. Effects of different stretching extents, morphologies, and brands on initial force and force decay of orthodontic elastomeric chains: An in vitro study. Dental Research Journal. 2020;17(5):326–337.
[2] Zheng B, Al-Somairi MAA, Li Z, et al. Effect of filament types and loops number on the force degradation of elastomeric chains used for orthodontic treatment: an in-vitro study. BMC Oral Health. 2023;23:113.
[3] Sabbagh H, Bamidis EP, Keller A, et al. Force behaviour of elastic chains during a simulated gap closure in extraction therapy cases. Orthodontics & Craniofacial Research. 2023;26(3):433–441.
This article is intended for orthodontic professionals, dental distributors, and professional purchasers. It does not replace clinical diagnosis, an individualized orthodontic treatment plan, or product-specific instructions for use.
