Clear Aligners

K210373 · Shenzhen Yinuo Dental Technology Co.Ltd · NXC · Aug 27, 2021 · Dental

Device Facts

• Record ID: K210373
• Device Name: Clear Aligners
• Applicant: Shenzhen Yinuo Dental Technology Co.Ltd
• Product Code: NXC · Dental
• Decision Date: Aug 27, 2021
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 872.5470
• Device Class: Class 2
• Attributes: Therapeutic

Intended Use

This device is indicated for use in the alignment of all permanent dentition through orthodontic treatment of misalignment and malocclusion.

Device Story

Clear Aligners are intraoral thermoformed plastic devices used for orthodontic tooth movement. Input consists of patient dental impressions or scans; these are processed via specialized CAD/CAM software (3Shape Ortho System) to create a treatment plan and a series of sequential 3D models. 3D printers create molds for each step, around which plastic sheets are thermoformed. The aligners are worn by the patient 20-22 hours/day, removed for eating/cleaning. The clinician monitors treatment progress and fit. The device provides gentle, continuous force to move teeth to a final desired position. Benefits include correction of malocclusion and misalignment.

Clinical Evidence

No clinical data. Bench testing only. Manufacturing validation assessed digital models, 3D printed molds, and final aligners using 3rd party software and digital calipers. Results showed translational measurements within 0.3mm and rotational measurements within 3 degrees of target values, meeting pre-established acceptance criteria.

Technological Characteristics

Intraoral thermoformed plastic aligner. Materials: Co-polyester or Co-polymer. Manufacturing: 3D printing of molds followed by thermoforming. Connectivity: Uses specialized CAD/CAM software (3Shape Ortho System) for treatment planning. Non-sterile. Biocompatibility compliant with ISO 10993-1, ISO 10993-5, ISO 10993-10, and ISO 7450.

Indications for Use

Indicated for alignment of permanent dentition in patients requiring orthodontic treatment for misalignment and malocclusion.

Regulatory Classification

Identification

An orthodontic plastic bracket is a plastic device intended to be bonded to a tooth to apply pressure to a tooth from a flexible orthodontic wire to alter its position.

Predicate Devices

• Clear Aligners (K192767)

Reference Devices

• 3Shape Ortho System Software (K152086)

Submission Summary (Full Text)

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August 27, 2021

Shenzhen Yinuo Dental Technology Co.LTD % Gamma Zhang RA Manager Feiving Drug&Medical Consulting Technical Service Group Rm 218, Building 2, Yike Intelligent Innovation Park, No. 232 Kezhu Road, Huangpu, Guangzhou Guangzhou, Guangdong 510000 China

Re: K210373

Trade/Device Name: Clear Aligners Regulation Number: 21 CFR 872.5470 Regulation Name: Orthodontic Plastic Bracket Regulatory Class: Class II Product Code: NXC Dated: July 13, 2021 Received: July 19, 2021

Dear Gamma Zhang:

We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.

Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal

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statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.

For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email ([e-mail]) or phone [phone] or 301-796-7100).

Sincerely,

For Michael E. Adjodha, M.ChE. Assistant Director DHT1B: Division of Dental and ENT Devices OHT1: Office of Ophthalmic, Anesthesia, Respiratory, ENT and Dental Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health

Enclosure

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# Indications for Use

510(k) Number (if known) K210373

Device Name Clear Aligners

Indications for Use (Describe)

This device is indicated for use in the alignment of all permanent dentition through orthodontic treatment and malocclusion.

Type of Use (Select one or both, as applicable)

X Prescription Use (Part 21 CFR 801 Subpart D)

Over-The-Counter Use (21 CFR 801 Subpart C)

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# 510 (k) Summary

This "510(k) Summary" of 510(k) safety and effectiveness information is submitted in accordance with requirements of Title 21, CFR Section 807.92.

# (1) Applicant information

| 510 (k) owner's name: | Shenzhen Yinuo Dental Technology Co.LTD |
|---------------------------|------------------------------------------------------------------------------------------------------------|
| Address: | Xinfeng Industry Park No.11,101-301, Xintian Community, Guanhu Street, Longhua, Shenzhen, Guangdong, China |
| Contact person: | Fiona |
| Phone number: | [phone] |
| Email: | [e-mail] |
| Date of summary prepared: | 2021-07-13 |

# (2) Reason for the submission

New device, there were no prior submissions for the device.

# (3) Proprietary name of the device

| Trade name/Model: | Clear Aligners |
|--------------------|-----------------------------|
| Common name | Aligner, sequential |
| Regulation name: | Orthodontic plastic bracket |
| Regulation number: | 21 CFR 872.5470 |
| Product code | NXC |
| Review panel: | Dental |
| Regulation class: | Class II |

| (4) Predicate device | |
|-----------------------|------------------|
| Sponsor | Royal Dental Lab |
| Device Name and Model | Clear Aligners |
| 510(k) Number | K192767 |
| Product Code | NXC |
| Regulation Number | 21 CFR 872.5470 |

II

# (5) Reference device

Regulation Class

This reference device - 3Shape Ortho System ™ is the software which used for the manufacturing process of Clear Aligner.

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| Sponsor | 3Shape A/S |
|-----------------------|--------------------------------|
| Device Name and Model | 3Shape Ortho SystemTM Software |
| 510(k) Number | K152086 |
| Product Code | PNN, LLZ |
| Regulation Number | 21 CFR 872.5470 |
| Regulation Class | II |

#### (6) Description/ Design of device

The Clear Aligner is intraoral thermoformed plastic aligner that worn 20 to 22 hours per day and is designed to be used in a sequence, each aligner providing a gentle continuous force, to allow for the movement of teeth to the final desired position. The aligner is to be removed for eating and for cleaning.

Clear Aligner is fabricated using a three-step process.

The first step is to obtain the dimensions and details of the patient's baseline dentition from the prescribing clinician who takes impressions or scans of the patient's teeth and sends them to the lab. The scanned data (digital CAD/CAM models or patient models) are imported into specialized dental software for treatment planning.

The second step is to sent the treatment plan to the dentist for review and approval, then print the 3D models of the treatment plan for use in step 3 (thermoforming). In the second step, we utilizes a software application to plan the treatment by creating a series of sequential models that gradually position the teeth into their final desired position. A 3D printer is used to create the molds needed for each treatment step to provide the surface around which the aligner is thermoformed.

The final step is the thermoforming of a plastic sheet material to each of the sequential treatment steps. This process is done using a standard thermoforming equipment and the appropriate material as outlined in this submission. And the thermoformed aligners are sent back to the dentist for distribution to the patient in sequential stages and that the dentist checks the aligners for fit and function and monitors the treatment from the first aligner until treatment is completed.

Specialized orthodontic CAD/CAM software will be used to develop the treatment plans and to produce standard 3D printer files that will facilitate the manufacturing of each sequential aligner in the treatment plan. The software application used for the manufacturing validation is this submission is the 3Shape Ortho System ™ Software which have 510(k) (K152086).

#### (7) Intended use/ Indications for use

This device is indicated for use in the alignment of all permanent dentition through orthodontic treatment of misalignment and malocclusion.

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| Component of<br>Device Requiring<br>Biocompatibility | Material of<br>Component | Body Contact Category<br>(ISO 10993-1) | Contact Duration<br>(ISO 10993-1) |
|------------------------------------------------------|-------------------------------|------------------------------------------------|-----------------------------------------------------|
| plastic sheet<br>material | Co-polyester or<br>Co-polymer | Surface-contacting device:<br>Mucosal membrane | Permanent duration<br>contact devices (>30<br>days) |

# (8) Materials

The body-contacting material (plastic sheet material) used in Clear Aligner has passed biocompatibility tests. Details can be seen in "Biocompatibility Discussion".

# (9) Technological characteristics and substantial equivalence

| Item | Subject device | Primary Predicate device | Remark |
|--------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------|-----------------|
| Trade name | Clear Aligner | Clear Aligner | / |
| 510 (k) number | / | K192767 | / |
| Regulation<br>number | 21 CFR 872.5470 | 21 CFR 872.5470 | Same |
| Regulation name | Orthodontic plastic bracket | Orthodontic plastic bracket | Same |
| Product code | NXC | NXC | Same |
| Class | II | II | Same |
| Indications for<br>use/ Intended use | This device is indicated for<br>use in the alignment of all<br>permanent dentition<br>through orthodontic<br>treatment of misalignment<br>and malocclusion. | This device is indicated for<br>use in the alignment of<br>permanent teeth through<br>orthodontic treatment of<br>misalignment and<br>malocclusion. | Similar. Note 1 |
| Prescription or<br>OTC | Prescription Use | Prescription Use | Same |
| Materials | Co-polyester or Co-polymer | Co-polyester or<br>Co-polymer | Same |
| Mode of Action | Continuous gentle force<br>applied to teeth to achieve<br>movement. | Continuous gentle force<br>applied to teeth to achieve<br>movement. | Same |
| Manufacturing<br>method | Thermoforming | Thermoforming | Same |
| Device<br>description | Sequential thermoformed<br>plastic aligner | Sequential thermoformed<br>plastic aligner | Same |
| Patient<br>Removable? | Yes | Yes | Same |
| Duration of Use | 20-22 hours per day | 20-22 hours per day | Same |
| Biocompatibility | Passed the tests as per ISO<br>10993-5 and ISO 10993-10 | Passed the tests as per ISO<br>10993-5 and ISO 10993-10 | Same |

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| | (Cytotoxicity, sensitization, irritation) | (Cytotoxicity, sensitization, irritation) | |
|-----------------|---------------------------------------------------------------|---------------------------------------------------------------|------|
| Sterility | Non-sterile | Non-sterile | Same |
| Anatomical site | Used by dentist or orthodontist on teeth for dental patients. | Used by dentist or orthodontist on teeth for dental patients. | Same |

Note 1: The indications for use of subject device is similar to the predicate device, but the indications for use of subject device is in the range of predicate device, so the difference does not affect the effectiveness and safety of the subject device.

#### Conclusion:

The conclusion drawn from the nonclinical tests demonstrates that the subject device in 510(K) submission K2103734, Clear Aligner is as safe, as effective, and performs as well as the legally marketed predicate device cleared under K192767.

### (10) Non-clinical studies and tests performed

Non-clinical tests have been conducted to verify that the Clear Aligner meets all design specifications which supports the conclusion that it's Substantially Equivalent (SE) to the predicate device.

#### Manufacturing Validation

A manufacturing validation was performed to demonstrate the manufacturing process for Clear Aligner. Three critical aspects of the manufacturing process were assessed: digital dentition models from treatment planning, 3D printed molds, and the final thermoformed aligner.

An independent 3rd party software and digital calipers were used to perform point-to-point and critical displacement measurement.

All translational measurements were within 0.3mm of the target input value and all rotational measurements were within 3 degrees of the target input value, the predefined tolerance of the manufacturing process. There were no statistical differences in the interence in the intended and measured values observed from any of the groups. This test has met the pre-established acceptance criteria.

#### Biocompatibility

A biocompatibility discussion was conducted. The Clear Aligner uses the Zendura plastic sheet material and this material has been tested and shown to be compliant with the following standards:

- A ISO 7450: 2008, Dentistry - Evaluation of biocompatibility of medical devices used in dentistry
- A ISO 10993-1, Biological evaluation of medical devices - Part 1: Evaluation and testing within a risk management process
- ISO 10993-5, Biological Evaluation of Medical Devices -- Part 5: Tests For InVitro A Cytotoxicity

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- > ISO 10993-10, Biological Evaluation of Medical Devices - Part 10: Tests For Irritation And Skin Sensitization
# (11) Clinical studies and tests performed

Clinical studies and tests were not conducted.

# (12) Conclusion

The conclusion drawn from the nonclinical tests demonstrates that the subject device in 510(K) submission K2103734, Clear Aligner is as safe, as effective, and performs as well as the legally marketed predicate device cleared under K192767.