PMMA Block is a device made from PMMA (polymethylmethacrylate) for the fabrication of temporary crowns and bridges and is intended for use in the oral cavity for up to six (6) months while awaiting a permanent restorations are designed and manufactured by a dental Professional (Technician) using CAD technology.

Device Description

This product is a kind of homogeneous high polymer material made from quality polymethylmethacrylate added with cross-linking agents to improve the network structure through a unique polymerization molding technology. It is mainly used for the fabrication of multi-unit, fully or partially anatomical long-term temporary bridge restorations with up to two pontics by CAD/CAM systems. Both anterior and posterior crown & bridge are recommended.

AI/ML Overview

This document describes the premarket notification (510(k)) for the PMMA Block, a device used for fabricating temporary crowns and bridges. The information provided focuses on demonstrating substantial equivalence to a predicate device, rather than a standalone study proving the device meets specific acceptance criteria based on human-in-the-loop performance or clinical outcomes.

Here's an analysis based on the provided text, addressing your questions where information is available:

1. Table of Acceptance Criteria and Reported Device Performance

The acceptance criteria are primarily defined by ISO standards and comparison to a predicate device.

Acceptance Criterion (Set by Standards/Predicate)	Reported Device Performance (PMMA Block)
Intended Use (Same as predicate)	A device made from PMMA for the fabrication of temporary crowns and bridges and is intended for use in the oral cavity for up to six (6) months while awaiting a permanent restoration. Restorations are designed and manufactured by a dental Professional (Technician) using CAD technology.
Material of Construction (Same as predicate)	PMMA
Shades (Comparable to predicate)	20 Vita Shades
Processing Method (Same as predicate)	Variable Thickness Milling Blank and machined using any milling system
Flexural Strength (According to ISO 10477, implied)	≥50 MPA (Predicate: 113 MPA)
Shelf-life (For information, not a direct acceptance criterion for equivalence)	Five Years
Performance Effectiveness (Tested according to ISO 10477)	Tested according to ISO 10477. "Its results show that the subject device fully meets the requirement..." (Specific numerical results beyond flexural strength not detailed in this summary).
Performance Safety (Tested according to ISO 10993 standards)	Tested according to ISO 10993 standards.
Biocompatibility (According to AAMI / ANSI / ISO 10993 standards)	Tested according to AAMI / ANSI / ISO 10993-3, 10993-5, 10993-10, and 10993-11.
Physical Property Testing (Includes flexural strength, surface polishing performance, bond strength, water sorption, solubility, shade consistency, color stability as per ISO 10477)	"The test results... show that the subject device fully meets the requirement..." (Specific values beyond flexural strength not provided in this summary).

2. Sample Size Used for the Test Set and Data Provenance

Test Set Sample Size: The document does not specify a "test set" in the context of clinical studies with patient data. The testing was non-clinical, primarily physical property and biocompatibility tests. The sample size for these non-clinical tests is not provided in this summary.
Data Provenance: The data is from non-clinical laboratory testing (physical, chemical, and biological) conducted by Rizhao Huge Dental Industry Co., Ltd. The country of origin for the data generation would be China, where the manufacturer is located. The nature of these tests is not "retrospective" or "prospective" in the typical clinical sense, but rather laboratory evaluations.

3. Number of Experts Used to Establish the Ground Truth for the Test Set and Qualifications of Those Experts

This information is not applicable. Ground truth, in the context of clinical studies, refers to a definitive diagnosis or outcome. For this device, the "ground truth" for non-clinical testing is adherence to established international standards (ISO, AAMI/ANSI/ISO). Expert consensus for ground truth is not relevant for this type of submission.

4. Adjudication Method for the Test Set

This information is not applicable. Adjudication methods (e.g., 2+1) are used in clinical studies to resolve discrepancies among expert readers. Since this submission relies on non-clinical testing against standards and comparison to a predicate, such methods are not relevant.

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. The PMMA Block is a material for dental restorations, not an AI-powered diagnostic or assistive device for human readers. Therefore, an MRMC study with AI assistance is not relevant to this submission.

6. If a Standalone (i.e., algorithm only without human-in-the-loop performance) Was Done

This information is not applicable. The PMMA Block is a physical product (material) and not an algorithm.

7. The Type of Ground Truth Used

The "ground truth" used for this submission is adherence to international standards for dental materials (ISO 10477) and biocompatibility (ISO 10993 series), and demonstration of comparable characteristics to a legally marketed predicate device. There is no clinical "ground truth" data (like pathology or outcomes data) presented in this 510(k) summary.

8. The Sample Size for the Training Set

This information is not applicable. There is no AI component involved, and thus no "training set" in the context of machine learning.

9. How the Ground Truth for the Training Set Was Established

This information is not applicable, as there is no training set for an AI algorithm.

Summary

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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" written around it. Inside the circle is an abstract image of a stylized eagle or bird with three profiles facing to the right.

Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002

February 9, 2015

Rizhao Huge Dental Industry Co., Ltd. c/o Ms. Helen Nan General Manager Wenzhao Cytech Information Service Co., Ltd. Room 302, No. 21 Building Kaiyu Garden, Xishan South Road Wenzhou, Zhejiang 325000 CHINA

Re: K141421 Trade/Device Name: PMMA Block Regulation Number: 21 CFR 872.3770 Regulation Name: Temporary Crown and Bridge Resin Regulatory Class: II Product Code: EBG Dated: April 15, 2014 Received: December 31, 2014

Dear Ms. Nan:

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. 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.

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Page 2 - Ms. Helen Nan

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); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); 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.

If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Small Manufacturers, International and Consumer Assistance at its tollfree number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm. Also, please note the regulation entitled. "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office

of Surveillance and Biometrics/Division of Postmarket Surveillance.

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 (800) 638-2041 or (301) 796-7100 or at its Internet address

http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.

Sincerely yours,

Tina
Kiang -S

for Erin I. Keith, M.S. Director Division of Anesthesiology, General Hospital, Respiratory, Infection Control and Dental Devices Office of Device Evaluation Center for Devices and Radiological Health

Enclosure

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DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration

Indications for Use

Form Approved: OMB No. 0910-0120 Expiration Date: January 31, 2017 See PRA Statement on last page.

510(k) Number (if known)

K141421

Device Name PMMA Block

Indications for Use (Describe)

PMMA Block is a device made from PMMA (polymethylmethacrylate) for the fabrication of temporary crowns and is intended for use in the oral cavity for up to six (6) months while awaiting a permanent restorations are designed and manufactured by a dental Professional (Technician) using CAD technology.

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

Prescription Use (Part 21 CFR 801 Subpart D)

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

PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON A SEPARATE PAGE IF NEEDED.

FOR FDA USE ONLY

Concurrence of Center for Devices and Radiological Health (CDRH) (Signature)

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K141421

Section 5 510(k) Summary

(As required by 21 CFR 807.92(a))

5.1 Submitter Information

· Company: Rizhao Huge Dental Industry Co., Ltd
No.68 Shanhai Road, Rizhao City, 276800, Shandong Province, China • Address:
· Phone: 086-633-2277285
· Fax: 086-633-2277298
· Contact: Steven Song, General Manager
· Date: April 15, 2014.

5.2 Device Information

· Trade/Device Name: PMMA Block
· Classification: Device Class: 2
- Review Panel: Dental

Name: Crown And Bridge, Temporary, Resin

Regulation Number: 21 CFR 872.3770

Regulation Name: Temporary crown and bridge resin Product Code: EBG

· Predicate Device: CORPA TEMP PMMA-DISK submitted by WHITE

PEAKS DENTAL SYSTEMS GMBH & CO.KG;

K Number: K131664

· Device Description:

· Intended Use:

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Item	Subject Device	Predicate Device
Indication for Use	A device made from PMMA(polymethylmethacrylate)for the fabrication oftemporary crowns andbridges and is intended foruse in the oral cavity for upto six (6) months whileawaiting a permanentrestoration. Restorations aredesigned and manufacturedby a dental Professional(Technician) using CADtechnology.	Same
Material ofConstruction	PMMA	Same
Shades	20 Vita Shades	Various Vita Shades
Processing Method	Variable Thickness MillingBlank and machined usingany milling system	Same
Flexural Strength	≥50MPA	113MPA
Shelf-life	Five Years	Unknown
PerformanceEffectiveness	Tested According to ISO10477	Same
Performance Safety	Tested according to ISO10993 standards	Same

5.3 Comparison of Required Technology Characteristics

Brief Summary:

First, the subject device - PMMA Block incorporates the same intended use with the predicate device. Secondly, the subject device shares similar design and fundamental technological characteristics with the predicate device, for example, they are both

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composed of PMMA, they enjoy the same processing method. Thirdly, both their safety and effectiveness have been verified by appropriated FDA recognized standards, which ensures that the subject device will be as safe and effective as the predicate device. Last but not least, though the two devices may be different in shelf life, such difference will not affect the core usage of the device, thus will not influence the comparison of substantial equivalence between the two devices.

5.4 Discussion of Tests Performed

· Clinical Tests:

Clinical testing has not been conducted on this product.

· Non-Clinical Tests

The following standards have been adopted to evaluate the safety and effectiveness of the subject device:

- Biocompatibility Test according to AAMI / ANSI / ISO

10993-3:2003/(R)2009, Biological evaluation of medical devices - Part 3: Tests for genotoxicity, carcinogenicity, and reproductive toxicity. (Biocompatibility), AAMI / ANSI / ISO 10993-5:2009, Biological evaluation of medical devices -- Part 5: Tests for In Vitro cytotoxicity. (Biocompatibility), AAMI / ANSI / ISO 10993-10:2010, Biological evaluation of medical devices - Part 10: Tests for irritation and skin sensitization. (Biocompatibility) and AAMI / ANSI / ISO 10993-11:2006/(R)2010, Biological Evaluation Of Medical Devices – Part 11: Tests For Systemic Toxicity. (Biocompatibility), the detail of which can be found in Attachment D ISO 10993 Test Report of the submission.

Physical property testing, such as flexural strength, surface polishing performance, bond strength, water sorption, solubility, shade consistency and color stability, according to ISO 10477 Second Edition 2004-10-01, Dentistry - Polymer-Based Crown And Bridge Materials. (Dental/ENT), the test results of which can be found on page 3 of Attachment E ISO 10477 Test Report of the submission. Its results show that the subject device fully meets the requirement, that it will be as effective as the predicate device, which well supports the Substantial Equivalence to the predicate device.

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5.5 Conclusion:

First, the subject device - PMMA Block enjoys the same intended use and similar technological characteristics with the predicate device. Besides, the performance safety and effectiveness of the subject device has been verified in accordance with the above FDA recognized standards, thus being considered to be as safe and effective as the predicate device.

In a word, it is reasonable for us to conclude that the subject device is substantially equivalent to the predicate device according to the above analysis.

Regulation Number and Section

§ 872.3770 Temporary crown and bridge resin.

(a)
Identification. A temporary crown and bridge resin is a device composed of a material, such as polymethylmethacrylate, intended to make a temporary prosthesis, such as a crown or bridge, for use until a permanent restoration is fabricated.(b)
Classification. Class II.