RELI-ON ONE STEP, ORTHODONTIC ADHESIVE

K053379 · Classone Orthodontics, Inc. · DYH · Jan 25, 2006 · Dental

Device Facts

• Record ID: K053379
• Device Name: RELI-ON ONE STEP, ORTHODONTIC ADHESIVE
• Applicant: Classone Orthodontics, Inc.
• Product Code: DYH · Dental
• Decision Date: Jan 25, 2006
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 872.3750
• Device Class: Class 2
• Attributes: Therapeutic

Intended Use

This device is intended for bonding brackets to teeth for orthodontic treatment.

Device Story

Reli-On is a one-step orthodontic adhesive system consisting of a viscous polymeric resin paste and a liquid activator. The clinician etches the tooth surface with phosphoric acid, applies the activator to the tooth and bracket base, and applies the paste to the bracket base. The bracket is then positioned on the tooth; the adhesive sets in approximately one minute, with optimal strength achieved in 24 hours. The system is used by orthodontists in a clinical setting to secure brackets for orthodontic treatment. The device benefits the patient by providing a reliable bond to withstand mastication-induced forces.

Clinical Evidence

Bench testing only. Comparison study evaluated set-time and shear bond strength against the predicate device. Set-time was measured using 5 samples per device on abraded acrylic rods. Shear bond strength was tested by loading brackets to failure; both devices exceeded the 8 MPa threshold, with ultimate shear bond strengths of 9.4 MPa (Reli-On) and 9.3 MPa (Right-On).

Technological Characteristics

Two-component resin adhesive system: viscous polymeric resin paste (peroxide catalyst) and liquid activator (amine component). Includes 35% phosphoric acid etchant. Delivered via plastic syringe and squeeze bottle. No specific ASTM/ANSI standards cited; performance validated via bench testing of set-time and shear bond strength.

Indications for Use

Indicated for patients undergoing orthodontic treatment requiring the bonding of brackets to teeth.

Regulatory Classification

Identification

A bracket adhesive resin and tooth conditioner is a device composed of an adhesive compound, such as polymethylmethacrylate, intended to cement an orthodontic bracket to a tooth surface.

Predicate Devices

• Right-On Adhesive bonding system (TP Orthodontics)

Submission Summary (Full Text)

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JAN 2 5 2006

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### 510(k) Summary

This 510(k) is submitted by:

Class One Orthodontics, Lubbock, TX Contact person: Judy Ribordy, Date of submission:

Device Name: Reli-On One Step Orthodontic Adhesive

Classification name: Adhesive, bracket and tooth conditioner, resin

Identification of a legally marketed device to which we are claiming equivalency

While we have identified 3 different products from 3 different companies to be substantially equivalent, in the interests of focusing our comparison data, we have chosen our target candidate to be:

### Right-On Adhesive bonding system, TP Orthodontics, 100 center Plaza, LaPorte, IN.

Device description:

Reli-On is a one step orthodontic adhesive. It comprises of two major components, i.e., a viscous polymeric resin paste and a watery component called. Activator. The paste is delivered from a syringe, while the activator is dispensed from a squeeze bottle. Besides the paste & the activator, the product kit contains a preloaded syringe of etchant (35% phosphoric acid solution), brushes to apply the activator on the tooth and a stack of mixing pads for easy transfer of the activator.

The tooth to be bonded is etched with the etchant (conditioner) for 10-20 seconds, followed by a water rinse. The activator is applied to the surface of the etched tooth and also to the base of the bracket. The paste is then applied to the base and the bracket is placed on the tooth in the desirable clinical position. In about a minute the bracket is securely fastened to the tooth. Optimum strength is achieved in 24 hours. The product comes with a detailed instruction for use pamphlet.

(K'152643)

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### Performance criteria

Currently, no establilshed performance criteria are published by eminent standards bodies(i.e. ASTM, ANSI, etc.). Therefore, the following two criteria, based on the actual product use, are selected for the equivalency comparison.

The most important criteria for the optimum performance of this product are:

- (1) Set time
- (2) Shear bond strength

### Set Time:

This is the time available to the clinician while manipulating the bracket to optimize the bracket location on the tooth. If the set time is too short, the clinician will not be able to place the bracket in the proper position before the adhesive sets up. Conversely, if the set time is too long, the bracket can "drift" from the desirable position, requiring constant attention until the final set has taken place. Typically the set time for one-step adhesives is in the range of 20-25 seconds. The experimental procedure for determining the set-time is outlined here.

Experimental procedure for determining set-up time for One-step (or No-Mix) adhesives.

### Methods & Materials

Materials used for performing set-up time Testing

- (a) Freedom MIM Roth brackets (upper centrals) or equivalent
- (b) Acrylic rod (1" radius)
- (c) sand paper (100 grit)
- (d) explorer or an equivalent pointed probe
- (e) Reli-on test adhesive and Right-On predicate adhesive.
- (f) stop-watch or equivalent

### Experimental method

Using the sand paper, abrade the acrylic rod surface. Apply Reli-On activator on the base of the bracket and on the sanded surface of the acrylic rod. Apply a thin layer of the adhesive paste on the bracket base. Immediately place the bracket on the acrylic rod (pretreated with activator) and start the stop watch. Using an explorer move the bracket slowly back and forth until the adhesive sets up and its gets difficult to manipulate the bracket. Note the time elapsed. This is the set-time in seconds. Repeat with 5 different samples and report the average value. Repeat entire procedure for Right-On (predicate) device.

### Shear bond strength:

The primary mode of stress transfer to the bracket in the oral environment is through shear. The brackets are dislodged by occlusal forces as experienced during biting hard objects such as hard candy, nuts etc in the oral environment.

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The adhesive should be capable of withstanding such forces. This mastication-induced force is reported to be around 6 to 8 MPa (ref 1). The experimental procedure for determining if the adhesive can support this shear load is outlined here.

# Experimental procedure for determining shear bond strength

Bond brackets to surface abraded acrylic rod, 1" diameter and 2" long. (as discussed above). Clamp the Rod to a table overhang with a C-clamp. Using a wire harmess load the bracket with static weights up to 24 pounds. This load translates to a stress of 8 MPa, based on the bracket base surface area (mesio-distal width (0.138") X occluso-gingival height (0.148") "Add additional weight until failure". The experiment can be extended by further loading to determine the ultimate shear stress by loading to failure. The ultimate failure stress is also reported for the two test candidates in the results. The experimental set-up is shown in figure (1). Repeat the experiment with 5 different brackets for both the candidate adhesives. All brackets should pass the 24lb static load.

#### References:

(1) Reynolds I.R., A review of direct orthodontic bonding. Br. J Orthod. 1975:2:171-178.

# Results of comparison studies including, set-time, and shear bond strength.

| Test criterion | Predicate device<br>(Right-On) | Device, being 510k'ed<br>(Reli-On) |
|-------------------------------------------------------------------------|--------------------------------|------------------------------------|
| Physical characteristics: | | |
| a) Paste | white, translucent thick paste | white, translucent thick paste |
| b) Activator | clear liquid, acrylic odor | clear liquid, acrylic odor |
| Set-Time (seconds)<br>(average of 5 trials) | 28 | 29 |
| Shear bond strength(MPa)<br>(pass/fail based on published data, ref. 1) | > 8 MPa(pass) | >8 MPa(pass) |
| Shear bond strength(MPa)<br>(Ultimate shear bond strength) | 9.3MPa | 9.4(MPa) |

### Conceptual design of the adhesive system

The adhesive system is made up of two primary components, a thick paste and a liquid activator. The activator, which contains the amine component, is applied to the surfaces of the etched tooth surface as well as to the bracket. The paste, which contains the peroxide catalyst, is then applied onto the bracket base and the bracket is positioned onto the tooth surface. The reaction proceeds from the outer surfaces towards the center.

The paste component is packaged in plastic syringes for easy delivery. The activator is packaged in a squeeze bottle. The etchant comes in a prefilled syringe. The labeling and the various components of the predicate device (Right-On) and the device being 510k'ed (Reli-On) are shown elsewhere.

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# Conclusions

Based on these test observations, we believe that Reli-On is substantially equivalent to the predicate device Right-On for the orthodontic application of bonding brackets to teeth.

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Public Health Service

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

JAN 2 5 2006

Ms. Judy Ribordy Quality Assurance Manager Classone Orthodontics, Incorporated 5064 50" Street Lubbock, Texas 79414

Re: K053379

Trade/Device Name: Reli-On One Step Orthodontic Adhesive Regulation Number: 872.3750 Regulation Name: Bracket Adhesive Resin and Tooth Conditioncr Regulatory Class: II Product Code: DYH Dated: November 30, 2005 Received: December 5, 2005

Dear Ms. Ribordy:

We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially cquivalent (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. 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.

If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to such 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.

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Page 2 - Ms. Ribordy

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 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); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.

This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.

If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at [phone]. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). You may obtain other general information on your responsibilitics under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number [phone] or [phone] or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.

Sincerely yours,

Senfie y. Michael md.

Chiu Lin, Ph.D. Director Division of Anesthesiology, General Hospital, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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# Indications for Use

K053379 510(k) Number (if known):

Device Name: Reli-On One Step Orthodontic Adhesive

Indications for Use: This device is intended for bonding brackets to teeth for orthodontic treatment.

Susan Runre

untustialogy, General Hospital, Jonard, Dental Devices

K053379

Prescription Use N/A (Part 21CFR 801 Subpart D) AND/OR

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Over-The-Counter Use N/A (Part 21 CFR 801 Subpart C)

Concurrence of CDRH, Office of Device Evaluation(ODF)

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