| HS Code | Official Doc | Tariff Rate | Origin | Destination | Effective Date |
|---|---|---|---|---|---|
| 3926902100 | Doc | 41.7% | CN | US | 2025-05-12 |
| 3926909910 | Doc | 42.8% | CN | US | 2025-05-12 |
| 3924905650 | Doc | 40.9% | CN | US | 2025-05-12 |
| 3924900500 | Doc | 40.6% | CN | US | 2025-05-12 |
| 9601908000 | Doc | 41.2% | CN | US | 2025-05-12 |
| 9601906000 | Doc | 37.5% | CN | US | 2025-05-12 |
| 9603210000 | Doc | 37.5% | CN | US | 2025-05-12 |
Dental Ligature
A dental ligature is a flexible tie used to hold a dental bracket to a tooth. It is a fundamental component in orthodontic treatment utilizing brackets.
Material:
- Elastic Ligatures: These are the most common type, constructed from various elastomeric polymers (rubber-like materials). They come in a wide range of colors. Common compositions include polyurethanes and polyisoprene.
- Wire Ligatures: Historically used, these are made of stainless steel and are less common today due to their discomfort and difficulty in adjusting.
- Power Ligatures: These are specialized elastic ligatures designed to deliver additional force for specific tooth movements.
Purpose:
The primary purpose of a dental ligature is to secure the archwire within the bracket slot. Without a ligature, the archwire would not be able to exert consistent force on the teeth to facilitate movement. They also help to maintain archwire position.
Function:
- Archwire Retention: Holds the archwire firmly in the bracket slot, preventing displacement.
- Force Transmission: Transmits the force from the archwire to the tooth.
- Archwire Control: Aids in controlling the position of the archwire during adjustments.
- Slot Closure: Helps to close the space between the bracket wings and the tooth, improving force application.
Usage Scenarios:
- Initial Bracket Placement: Used immediately after bracket bonding to secure the archwire.
- Archwire Changes: Replaced during routine orthodontic adjustments when the archwire is changed.
- Archwire Adjustments: May be tightened or repositioned to alter force vectors.
- Power Mechanics: Specialized ligatures are used in conjunction with specific archwire configurations to achieve targeted tooth movement.
Common Types:
- Standard Elastic Ligatures: The most frequently used, available in numerous colors and sizes.
- O-Rings: Small, circular elastic ligatures.
- Figure-Eight Ligatures: Designed to provide greater stability and force.
- Power Chains: A series of interconnected elastic ligatures used for closing spaces or creating specific force systems.
- Buttress Ligatures: Used to provide force in a specific direction.
- Self-Ligating Brackets: While not ligatures themselves, these brackets have a built-in mechanism to secure the archwire, eliminating the need for separate ligatures.
Dental ligature falls under the category of articles used in dentistry, specifically those related to oral hygiene and dental procedures. Based on the provided reference material, the following HS codes are relevant:
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9603210000: This HS code covers brooms, brushes (including brushes constituting parts of machines, appliances or vehicles), hand-operated mechanical floor sweepers, not motorized, mops and feather dusters; prepared knots and tufts for broom or brush making; paint pads and rollers; squeegees (other than roller squeegees). More specifically, it includes toothbrushes, shaving brushes, hair brushes, nail brushes, eyelash brushes and other toilet brushes for use on the person, including such brushes constituting parts of appliances. Dental ligature, being a small cord or band used in dental braces and orthodontic treatment, can be considered a specialized type of “toilet brush for use on the person” due to its application in oral hygiene.
- Chapter 96: Covers miscellaneous manufactured articles.
- Heading 9603: Specifically covers brooms, brushes, and similar articles.
- Subheading 9603210000: Covers toothbrushes, shaving brushes, etc., for use on the person.
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3926902100: This HS code covers other articles of plastics and articles of other materials of headings 3901 to 3914. More specifically, it includes ice bags; douche bags, enema bags, hot water bottles, and fittings therefor; invalid and similar nursing cushions; dress shields; pessaries; prophylactics; bulbs for syringes; syringes (other than hypodermic syringes) and fittings therefor, not in part of glass or metal. If the dental ligature is made of plastic, this HS code may be applicable.
- Chapter 39: Covers plastics and articles thereof.
- Heading 3926: Covers other articles of plastics and articles of other materials.
- Subheading 3926902100: Covers specific articles like ice bags, syringes, etc.
Regarding HS code 9603210000, please note that it includes toothbrushes and similar articles for use on the person. The basic tariff is 0.0%, with an additional surcharge of 7.5%, and a further surcharge of 30% after April 2, 2025. The total tariff rate is 37.5%.