1. Product Name

Orthodontic Torque Spring

2. Intended Use / Function

The Orthodontic Torque Spring is a fixed orthodontic auxiliary intended to deliver precise, controlled torque forces to specific teeth (typically anterior teeth) during comprehensive orthodontic treatment. It is used to correct axial inclination (torque) of tooth crowns, helping achieve proper root angulation and occlusal alignment.

3. Functional Description

The torque spring features a preformed wire configuration (e.g., helically coiled or cantilever design) that, when engaged between the archwire and a slot or auxiliary tube on the bracket, applies a defined counter‑clockwise or clockwise rotational moment to the tooth root. The spring generates low, continuous force (typically 15–50 g·mm) to achieve gradual torque expression without excessive pressure on the periodontium.

4.Precautions

Professional use only – Do not attempt patient self‑adjustment.

Sterilization – The spring is supplied non‑sterile. Clean and sterilize using validated steam sterilization (e.g., 134°C for 5 minutes) prior to intraoral placement.

Do not overactivate – Excessive torque force (>100 g·mm) may cause apical root resorption or bracket debonding.

Check for fatigue – Do not reuse springs that have been previously bended or clinically used for more than 3 months.

Magnetic resonance imaging (MRI) – This product is made of non‑ferrous alloy (austenitic stainless steel / beta‑titanium). Evaluate MRI compatibility per local guidelines (generally conditional at 1.5T or 3.0T).

Adverse reactions – Discontinue use if persistent gingival inflammation, allergic reaction (nickel sensitivity), or unintended tooth mobility occurs.

Local regulations – Follow national requirements for medical device traceability and adverse event reporting.

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