IMTEC BIOBARRIER MEMBRANE

K972240 · Imtec Corp. · NPK · Aug 26, 1997 · Dental

Device Facts

• Record ID: K972240
• Device Name: IMTEC BIOBARRIER MEMBRANE
• Applicant: Imtec Corp.
• Product Code: NPK · Dental
• Decision Date: Aug 26, 1997
• Decision: SESE
• Submission Type: Traditional
• Regulation: 21 CFR 872.3930
• Device Class: Class 2
• Attributes: Therapeutic

Intended Use

IMTEC Biobarner is a temporarily implantable material intended to be used as a space maintaining barrier over bone. It is intended for use in the oral cavity. The material is conformable to a variety of shapes as required for specific anatomical limitations.

Device Story

The Imtec Biobarrier Membrane is a high-density, nonporous polytetrafluoroethylene (PTFE) film. It functions as a physical barrier in Guided Tissue Regeneration (GTR) procedures within the oral cavity. By isolating incised oral epithelial and gingival connective tissue from treated root surfaces or alveolar bone, the membrane prevents the migration of non-osteogenic cells into the wound site. This isolation allows osteoblasts and endothelial cells to repopulate the defect, promoting bone growth. The device is conformable to various anatomical shapes. It is intended for surgical use by dental professionals. Unlike porous PTFE membranes, which require removal if primary tissue closure fails and infection occurs, the high-density design allows the membrane to be left exposed in the oral cavity without compromising the underlying bone grafting material.

Clinical Evidence

No clinical data provided for the subject device. Evidence consists of literature reviews and animal/human studies (1982-1996) supporting the general use of PTFE membranes for Guided Tissue Regeneration and the specific clinical observation that high-density PTFE membranes can be left exposed in the oral cavity to promote bone deposition.

Technological Characteristics

Material: High-density, nonporous polytetrafluoroethylene (PTFE). Form factor: Conformable membrane/film. Principle: Physical barrier for Guided Tissue Regeneration (GTR). Energy source: None (passive implant).

Indications for Use

Indicated for use as a space-maintaining barrier over bone in the oral cavity to facilitate osseous repair.

Regulatory Classification

Identification

Bone grafting material is a material such as hydroxyapatite, tricalcium phosphate, polylactic and polyglycolic acids, or collagen, that is intended to fill, augment, or reconstruct periodontal or bony defects of the oral and maxillofacial region.

Special Controls

*Classification.* (1) Class II (special controls) for bone grafting materials that do not contain a drug that is a therapeutic biologic. The special control is FDA's “Class II Special Controls Guidance Document: Dental Bone Grafting Material Devices.” (See § 872.1(e) for the availability of this guidance document.)(2) Class III (premarket approval) for bone grafting materials that contain a drug that is a therapeutic biologic. Bone grafting materials that contain a drug that is a therapeutic biologic, such as biological response modifiers, require premarket approval. (c) *Date premarket approval application (PMA) or notice of product development protocol (PDP) is required.* Devices described in paragraph (b)(2) of this section shall have an approved PMA or a declared completed PDP in effect before being placed in commercial distribution.

Reference Devices

• Millipore Filter
• Gore-Tex (W. L. Gore & Assoc.)

Submission Summary (Full Text)

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K972240

AUG 26 897

## SAFETY AND EFFECTIVENESS: IMTEC/BIOBARRIER

Submitted by: M. K. Patterson, Jr., PhD Sr. Vice President, Regulatory Affairs

A long history exists for the safe and effective use of some nonresorbable biocompatible synthetic materials when implanted into the human body. The material most documented as safe and effective is a polymer known as polytetrafluoroethylene or PTFE. This material, first patented in 1941 and better known as "TEFLON" is composed of long chains of linked Carbon-Fluoride units. Over 100 (1) to 150 (2) publications by independent researchers in peer-reviewed scientific journals have established the material as a suitable material for reconstructive surgical procedures such as cardiovascular and hernial patches, vascular grafts, sutures and periodontal repairs. In periodontal procedures a technique known as "Guided Tissue Repair (GTR)" was introduced in 1982 by Nyman, et al (3). They first described the use of nonresorbable "Millipore Filter" in the procedure. The GTR principle is based on the isolation of incised oral epithelial and gingival connective tissue from treated root surfaces or from Alveolar bone in the case of osseointegrated dental implants. In the latter case the isolation allows osteoblasts and endothelial cell to repopulate the wound, consequently enhancing the closure of a bony defect around the implant. PTFE membranes have subsequently been used with success to exclude those cells without osteogenic potential (4-6).

## PERI-IMPLANT OSSEOUS REPAIRS:

In early studies using expanded PTFE membranes to cover implants, Becker, et al (7) placed implants in the mandible of dogs and created a defect by exposing threads of the implants. The implants were then covered with membrane. After 18 weeks the implants covered by the membranes showed marked bone growth when compared to controls Similar techniques have proven successful in humans ( 8 - 11).

The aforementioned studies were conducted using an expanded (porous ) form of PTFE. A recurring problem with porous PTFE has been that should primary closure of the tissue fail ,infection occurs, and the membrane must be prematurely removed. Bartee ( 12), suggested that "high density" PTFE (nonporous) membranes could be left exposed in the

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oral cavity and promote the deposition of bone without compromising the bone grafting material. Subsequent studies (13 - 15) comparing various membrane types have confirmed his observation.

## REFERENCES

- Tinti, c. and Vincenzi, G.P, Expanded Polytetrafluoroethylene Titanium-Reinforced 1. Membranes for Regeneration of Mucogingival Recession Defects. J. Periodontol.
- 1994;

65:1088 -1094.

- Promotional Literature, "The Regen Tech Review" Gore-Tex, W. L. Gore & Assoc., 2. Inc., Flagstaff, AZ.
- Nyman, S., et al, New Attachment Following Surgical Treatment of Human 3. Periodontal Disease. J. Clin. Periodontal. 1982; 9: 290 -296
- Gottlow, J. . et al, New attachment Formation as the Results of Controlled Tissue 4. Regeneration, J. Clin. Periodontal. 1984; 11: 494 -503.
- Gottlow. J., et al. New Attachment Formation in the Human Periodontium by ട്. Guided Tissue Regeneration: Case Reports. J. Clin. Periodontol. 1986; 13: 604 -616.
- 6. Pontoriero, R., et al. Guided Tissue Regeneration in the Treatment of Furcation Defects in Man. J. Clin. Peridontol. 1987: 14: 618- 620.
- Becker, W., et al. Bone formation at Dehisced Dental Implant Sites Treated with 7. Implant Augmentation Material: A pilot Study in Dogs. Int J. Peridont. Rest. Dent., 1990; 10:93 -101.
- Becker, W. and Becker, B. E., Guided Tissue Regeneration for Implants Placed into 8. Extraction Sockets and for Implant Dehiscences: Surgical Techniques and Case Reports. Int. J. Peridont. Res. Dent., 1990; 10: 377 -391.
- 9. Nyman, S., et al. Bone Regeneration Adjacent to Titanium Dental Implants Using Guided Tissue Regeneration: A Report of Two Cases. Int. J. Oral Maxillofac. Implants. 1990; 5: 9 -14.

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- Mellonig, J. T. and Triplett, R. G. Guided Tissue Regeneration and Endosseous 10 Dental Implants. Int. J. Periodont. Res. Dent. 1993; 13: 109 -119.
- 11. Jovanovic, S. A., et al. The regenerative Potential of Plaque-induced Peri-implant Bone Defects Treated by Submerged Membrane Technique: An Experimental Study. Int. J. Maxillofac. Implants. 1993; 8: 13 -18.
- Bartee, B. The Use of High-Density Polytetrafluoroethylene Membrane to Treat 12. Osseous Defects: Clinical Reports. Implant Dent. 1995; 4: 21 -26.
- Carr, J. ,et al. Evauation of a Full Density polytetrafluoroethylene (PTFE) Film to 13. Promote Ostegenesis in the Rat Model. Oral Implantology. 1995; 21: 89 -95.
- 14. Crump, B., et al. The Influence of Three Membrane Types on Bone Defects. Oral Surgery, Oral Medicine, Oral Pathology and Oral Radiology. 1996; Oct: 365 -374
- 15. Krauser, Dental Implantology Update. 1996; 7: 65 -69.

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Public Health Service

Food and Drug Administration 9200 Corporate Boulevard Rockville, Maryland 20850

OCT 1 0 2007

M.K. Patterson Jr., Ph.D. Sr. Vice President Regulatory Affairs IMTEC Corporation 2401 North Commerce Admore, Oklahoma 73401

Re: K972240

Trade Name: Imtec Biobarrier Membrane Regulation Number: 872.3930 Regulation Name: Bone Grafting Material Regulatory Class: 2 Product Code: NPK Dated: June 10, 1997 Received: June 16, 1997

Dear Dr. Patterson:

This letter corrects our substantially equivalent letter of August 8, 2001.

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 (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 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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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 continue 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 responsibilities 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/dsma/dsmamain.html

Sincerely yours,

Sytte y. Michael Dmd.

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

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Protecting and Promoting Public Health

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510(k) Number (if known): Ka 12241

IMTEC BIOBARRIER MEMBRANE Device Name:

Indications For Use:

IMTEC Biobarner is a temporarily implantable material intended to be used as a space maintaining barrier over bone. It is intended for use in the oral cavity. The material is conformable to a variety of shapes as required for specific anatomical limitations.

(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)

Concurrence of CDRH, Office of Device Evaluation (ODE)

Susen Runner

Prescription Use V (Per 21 CFR 801.109)

OR

Over-The-Counter Use

(Optional Format 1-2-96)