PolyBone is a self-setting, calcium phosphate cement intended for use in the repair of neurosurgical burr holes, contiguous craniotomy cuts and other cranial defiect as well as in the augmentation or restoration of bony contour in the craniofacial skeleton.

Device Description

PolyBone consists of beta-tricalcium phosphate, monocalcium monobasic, calcium sulfate hemihydrate and polyphosphate. PolyBone is indicated for use as cranioplasty cement.

AI/ML Overview

1. A table of acceptance criteria and the reported device performance

Property	Acceptance Criteria (Predicate: Stryker Instruments K043334)	Reported Device Performance (PolyBone)
Doughing Time	Similar to predicate	Similar to predicate
Setting Time	Similar to predicate	Similar to predicate
Working Time	Similar to predicate	Similar to predicate
pH	Similar to predicate	Similar to predicate
Compressive Strength	Minimum 2.6 MPa (ISO 7490:2000 Type 2)	22.7 MPa
Dissolution Rate	Not explicitly stated as acceptance criteria	More rapid rate than the predicate
Biocompatibility	Pass ISO 10993-1:2003 standards	Biologically safe

2. Sample size used for the test set and the data provenance (e.g., country of origin of the data, retrospective or prospective)

The document does not mention a specific "test set" in the context of clinical studies for performance comparison or data provenance. The performance similarities are based on comparative material property testing.

3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts (e.g., radiologist with 10 years of experience)

This information is not applicable as the submission details material property comparisons and biocompatibility testing, not a clinical study involving experts for ground truth establishment.

4. Adjudication method (e.g., 2+1, 3+1, none) for the test set

This information is not applicable.

5. If a multi-reader multi-case (MRMC) comparative effectiveness study was done, If so, what was the effect size of how much human readers improve with AI vs without AI assistance

This information is not applicable as this device is an artificial bone substitute, not an AI-powered diagnostic or assistive tool for human readers.

6. If a standalone (i.e., algorithm only without human-in-the-loop performance) was done

This information is not applicable as this is a medical device (bone substitute), not an algorithm.

7. The type of ground truth used (expert consensus, pathology, outcomes data, etc.)

For the material properties (doughing time, setting time, working time, pH, compressive strength, dissolution rate), the "ground truth" or reference was derived from established standards (e.g., ISO 7490:2000 for compressive strength) and comparison to a legally marketed predicate device. For biocompatibility, the ground truth was based on compliance with ISO 10993-1:2003 guidelines.

8. The sample size for the training set

This information is not applicable as this is a medical device (bone substitute), not a machine learning model requiring a training set.

9. How the ground truth for the training set was established

This information is not applicable.

Summary

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K070012

DEC & T 2007

Kyungwon Medical

Suite 601 World Meridian Venture Center, 60-24 Gasan-dong, Geumcheon-gu, Seoul, Korea 153-801

510(k) Summary

Date: Date: Date: Date: Date:

1. Company making the submission:

	Submitter
Name	Kyungwon Medical Co., Ltd.
Address	Suite 601 World Meridian Venture Center, 60-24Gasan-dong, Geumcheon-gu, Seoul, Korea 153-801
Phone	+82 2 2113-8693~8
Fax	+82 2 2113-8699
Contact	Ph.D. Hwang, In Soo
Internet	http://www.kyungwonmedinet.co.kr

2. Device :

Trade Name - PolyBone Common Name - Artificial bone substitute Classification Name - Methyl methacrylate for cranioplasty

1. Predicate Device: BoneSource® HAC Rapid Setting Cement, Methyl methacrylate for cranioplasty, Stryker Instruments, K043334.
1. Description :

PolyBone consists of beta-tricalcium phosphate, monocalcium monobasic, calcium sulfate hemihydrate and polyphosphate. PolyBone is indicated for use as cranioplasty cement.

1. Indication for use :
  PolyBone is a self-setting, calcium phosphate cement intended for use in the repair of neurosurgical burr holes, contiguous craniotomy cuts and other cranial defects as well as in the augmentation or restoration of bony contour in the craniofacial skeleton.
1. Review :
  Polybone has the similar technological characteristics to the predicate device; components, indication for use, chemical and performance properties.

Components Similarities Both products are supplied with Powder and Liquid.

Indication for Use Similarities

510k Summary Page # 1 of 2

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Suite 601 World Meridian Venture Center, 60-24 Gasan-dong, IX Kyungwon Medical Geumcheon-gu, Seoul, Korea 153-801

Both products have the same indication for use.

Chemical Similarities

Both products are made up from Calcium phosphate family.

Performance Properties Similarities

The properties of both devices have the equivalence in the doughing time, setting time, working time and pH. The different points are compressive strength and dissolution rate. The compressive strength force of predicate is 60 MPa and of Polybone is 22.7MPa. The predicate device is used in the cortical bone and Polybone is in cancellous bone. Minimum 2.6 MPa is the acceptance criteria for Type 2 in ISO 7490:2000 Dental gypsum-bonded casting investments. In the dissolution rate Polybone has more rapid rate than the predicate.

Biocompatibility

The biocompatibility of Polybone has been performed by ISO 10993-1:2003; cytotoxicity, sensitization, irritation, intracutaneous reactivity, systemic toxicity, subchronic toxicity, genotoxicity and implantation. The testing results show Polybone to be biologically safe.

Therefore, we believe that Polybone is substantially equivalent to predicated device according to the above information in terms of component, indication for use, chemical and performance priorities.

7. Conclusions :

Based on the information provided in this premarket notification Kyungwon Medical Co., Ltd. concludes that PolyBone is safe and effective and substantially equivalent to predicate devices as described herein.

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Image /page/2/Picture/1 description: The image shows the seal of the U.S. Department of Health & Human Services. The seal features a stylized eagle-like symbol on the right. The text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" is arranged in a circular pattern around the symbol.

Public Health Service

DEC 2 7 2007

Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850

Kodent, Inc. % Steve Chang, Ph.D. President 13340E Firestone Boulevard Suite J Santa Fe Springs, CA 90670

K070012 Trade/Device Name: PolyBone® Regulation Number: 21 CFR 882.5300 Regulation Name: Methyl methacrylate for cranioplasty Regulatory Class: Class II Product Code: GXP Dated: November 6, 2007 Received: November 13, 2007

Dear Dr. Chang:

Re:

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. 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.

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.

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Page 2 - Steve Chang, Ph.D.

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 Center for Devices and Radiological Health's (CDRH's) Office of Compliance at (240) 276-0120. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometric's (OSB's) Division of Postmarket Surveillance at (240) 276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at (240) 276-3464. You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at toll-free number (800) 638-2041 or (240) 276-3150 or the Internet address http://www.fda.gov/cdrh/industry/support/index.html.

Sincerely yours,

Mark M. Millman

Mark N. Melkerson Director Division of General, Restorative and Neurological Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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510(k) Submission

Indications for Use

510(k) Number (if known)

070012

Device Name: PolyBone

Indications for Use:

Prescription Use (21CFR801 Subpart D) AND/OR

Over-The-Counter Use-(21CFR801 Subpart C)

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

Concurrence of CDRH, Office of Device Evaluation (ODE)

(Division Sign-Off

Division of General, Restorative, and Neurological Devices

510(k) Number K070012

Indication for use Page # 1

Regulation Number and Section

§ 882.5300 Methyl methacrylate for cranioplasty.

(a)
Identification. Methyl methacrylate for cranioplasty (skull repair) is a self-curing acrylic that a surgeon uses to repair a skull defect in a patient. At the time of surgery, the surgeon initiates polymerization of the material and forms it into a plate or other appropriate shape to repair the defect.(b)
Classification. Class II (performance standards).