(147 days)
Preat Abutments are intended to be used in conjunction with endosseous dental implants in the maxillary or mandibular arch to provide support for single-unit or multi-unit prosthetic restorations.
All digitally designed CAD/CAM customizations for Preat Abutments are intended to be sent to a Preat validated Milling Center for manufacture or to be designed and manufactured according to a validated digital dentistry workflow. The workflow system integrates multiple components of the digital dentistry workflow: scan files from intra-oral and lab (desktop) scanners, CAD software, CAM software, milling machine and associated tooling and accessories.
Preat Abutments are compatible with the following third-party implant restorative platforms:
| Compatible Third-Party Implant Systems | Implant Body Diameter (mm) | Implant Platform Diameter (mm) |
|---|---|---|
| 3i OSSEOTITE® Certain® | 3.25 | 3.4 |
| 4.0 | 4.1 | |
| 5.0 | 5.0 | |
| 6.0 | 6.0 | |
| Astra Tech OsseoSpeed™ | 3.0 | 3.0 |
| 3.5, 4.0 | 3.5/4.0 | |
| 4.5, 5.0 | 4.5/5.0 | |
| Astra Tech OsseoSpeed™ Plus (OsseoSpeed™ EV) | 3.0 (3.0S) | 3.0 |
| 3.6 (3.6S) | 3.6 | |
| 4.2 (4.2C, 4.2S) | 4.2 | |
| 4.8 (4.8C, 4.8S) | 4.8 | |
| 5.4 (5.4S) | 5.4 | |
| BioHorizons® Tapered Internal | 3.0 | 3.0 |
| 3.5 | 3.5 | |
| 4.0 | 4.5 | |
| HIOSSEN ET III | 3.5 | Mini |
| 4.0, 4.5, 5.0, 6.0, 7.0 | Regular | |
| Implant Direct Legacy | 3.2 | 3.0 |
| 3.7, 4.2 | 3.5 | |
| 4.7, 5.2 | 4.5 | |
| 5.7, 7.0 | 5.7 | |
| Keystone PrimaConnex™ | 3.5 | 3.5 (SD) |
| 4.1 | 4.1 (RD) | |
| 5.0 | 5.0 (WD) | |
| MegaGen AnyRidge | 3.5, 4.0, 4.5, 5.0, 5.5 | 3.5 |
| Neodent® GM™ Helix | 3.5, 3.75, 4.0, 4.3, 5.0, 6.0, 7.0 | 3.0 |
| Neoss | 3.5, 4.0, 4.5, 5.0, 5.5 | 4.1 |
| Nobel Biocare™ NobelActive® | 3.0 | 3.0 |
| 3.5 | NP | |
| 4.3, 5.0 | RP | |
| Nobel Biocare™ NobelReplace® | 3.5 | NP |
| 4.0, 4.3, 5.0 | RP | |
| 5.0 | WP | |
| 6.0 | 6.0 | |
| Straumann™ BLX | 3.75, 4.0, 4.5 (RB) | RB |
| 5.0, 5.5, 6.5 (WB) | WB | |
| Straumann® Bone Level | 3.3 | NC |
| 4.1, 4.8 | RC | |
| Straumann® Tissue Level | 3.3, 4.1, 4.8 | RN |
| 4.8, 6.5 | WN | |
| Zimmer Screw-Vent®/ Tapered Screw-Vent® | 3.3, 3.7, 4.1 | 3.5 |
| 4.7 | 4.5 | |
| 6.0 | 5.7 |
The purpose of this submission is to expand the use of Preat Abutments, specifically the titanium blank abutment design, to be used in a validated equipment CAD/CAM workflow where specific abutment design software, milling machines and tooling have been validated to work with the previously cleared components in K220823 and K183518.
This submission includes a titanium blank design which is compatible with sixteen (16) implant system, with a distinct connection platform, as well as varying implant diameters and implant platform diameters, for each system.
The Subject device abutments may be placed in implants located in the mandibular or maxillary arches. The Subject device abutments are compatible with implant body diameters that range from 3.0 mm to 7.0 mm and implant platform diameters which range from 2.9 to 6.0 mm.
All abutments and screws are manufactured from Ti-6Al-4V ELI alloy conforming to ASTM F136 and are provided non-sterile to the end user.
The design parameters for the CAD/CAM Titanium Blank custom abutment are:
- Minimum wall thickness – 0.5 mm to 0.9 mm (varies by implant line);
- Minimum post height for single-unit restorations (length above the abutment collar / gingival height)– 4.0 mm;
- Maximum Angle – 30°*; and
- Minimum gingival height – 0.5 mm;
- Maximum gingival height – 1.5 mm to 4.5 mm (varies by implant line).
*Astra Tech® OsseoSpeed™ Plus (OsseoSpeed™ EV) compatible are limited to 0° maximum correction angle.
The minimum and maximum abutment design parameters listed above correspond to the abutment designs used in the mechanical testing data provided in the sponsor's K220823 and K183518 device submissions.
All digitally designed CAD/CAM customizations for Preat Abutments are intended to be sent to a Preat validated Milling Center for manufacture or to be designed and manufactured according to a validated digital dentistry workflow which includes: Scan files from Intra-Oral and Desktop Scanners, CAD software, CAM software, a Milling machine and associated tooling and accessories.
The provided FDA 510(k) clearance letter pertains to "Preat Abutments," which are endosseous dental implant abutments. This type of device is mechanically tested and does not typically involve the kinds of studies (e.g., AI integration, human reader studies, clinical outcomes) that would necessitate the extensive "acceptance criteria" and "study proving device meets acceptance criteria" information you've requested.
The document describes non-clinical performance data to demonstrate substantial equivalence, focusing on engineering aspects and material compatibility, rather than clinical efficacy or diagnostic accuracy.
Therefore, many of the specific points you've asked for (e.g., sample size for test set, data provenance, number of experts for ground truth, adjudication method, MRMC study, effect size, standalone performance, ground truth for training set, training set sample size) are not applicable to this type of device and are not present in the provided FDA submission information.
Here's a breakdown based on the available information:
1. A table of acceptance criteria and the reported device performance
The document does not explicitly state acceptance criteria in a quantitative table format as one might find for a diagnostic AI device. Instead, it details the engineering and material performance tests conducted to demonstrate substantial equivalence to predicate devices. The "reported device performance" is described qualitatively by stating that the tests were performed and that the device is substantially equivalent.
| Category | Acceptance Criteria (Inferred/Stated) | Reported Device Performance (as per document) |
|---|---|---|
| Mechanical Performance | - Static compression testing according to ISO 14801. | - "Worst-case constructs were subjected to static compression and compression fatigue testing." - This implies the device met the standards of ISO 14801, demonstrating mechanical integrity comparable to predicates. (Specific pass/fail values or results are not provided in this summary, but would have been in the full submission). |
| - Compression fatigue testing according to ISO 14801. | ||
| Software Validation | - Restrictions to prevent design outside stated design parameters. | - "Software verification included testing of restrictions that prevent design of components outside of the stated design parameters." |
| - Abutment design library limitations are locked and unmodifiable. | - "The abutment design library was validated to demonstrate that the established design limitations and specifications are locked and cannot be modified by the user." | |
| - CAM restriction zones avoid damage/modification of connection geometry and are locked. | - "Validation testing of the CAM restriction zones was conducted, including verification to show avoidance of damage or modifications of the connection geometry, and locking of restriction zones from user editing in the CAM software." | |
| Biocompatibility | - Conforms to ISO 10993-1 and ISO 10993-5. | - "Biocompatibility has been demonstrated through the sponsor's K220823 device testing according to ISO 10993-1, and ISO 10993-5." (Leveraged from predicate). |
| Sterilization | - Conforms to ISO 17665-1 and ISO 14937. | - "Sterilization validation was demonstrated through and leveraged from the sponsor's K220823 device testing according to ISO 17665-1 and ISO 14937." (Leveraged from predicate). |
| MR Safety | - Assessment of magnetically induced displacement force and torque. | - "Non-clinical worst-case MRI review was performed... using scientific rationale and published literature... Rationale addressed parameters per the FDA guidance 'Testing and Labeling Medical Devices for Safety in the Magnetic Resonance (MR) Environment,' including magnetically induced displacement force and torque." (Indicating an assessment was made to show safety, though specific results are not detailed). |
| Material Composition | - Ti-6Al-4V ELI alloy conforming to ASTM F136. | - "All abutments and screws are manufactured from Ti-6Al-4V ELI alloy conforming to ASTM F136." |
| Design Parameters (for CAD/CAM customizations) | - Minimum wall thickness: 0.5 mm to 0.9 mm (varies). - Minimum post height single-unit: 4.0 mm. - Maximum Angle: 30° (0° for some Astra Tech models). - Minimum gingival height: 0.5 mm. - Maximum gingival height: 1.5 mm to 4.5 mm (varies). | - The device is designed to these parameters, and software validation ensures these are maintained. |
2. Sample size used for the test set and the data provenance (e.g. country of origin of the data, retrospective or prospective)
- Sample Size for Test Set: The document mentions "worst-case constructs" for mechanical testing, but does not specify a numerical sample size. For software, it refers to "testing of restrictions" and "validation testing," without numerical samples. Biocompatibility and sterilization data are leveraged from previous submissions (K220823).
- Data Provenance: Not specified in terms of country of origin. The data is non-clinical/bench 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)
- Not applicable. This device is an implant abutment, not a diagnostic device requiring expert interpretation of medical images or data to establish ground truth. The "ground truth" here is adherence to engineering standards and material properties.
4. Adjudication method (e.g. 2+1, 3+1, none) for the test set
- Not applicable. As above, this is not a diagnostic study requiring expert adjudication.
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
- Not applicable. This is not a diagnostic device involving AI and human readers.
6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done
- Not applicable. This device is a dental implant component, not an algorithm. The software mentioned is for design and manufacturing control, not for standalone diagnostic performance.
7. The type of ground truth used (expert consensus, pathology, outcomes data, etc)
- The "ground truth" for this device's performance is adherence to recognized international standards (e.g., ISO 14801 for mechanical testing, ISO 10993 for biocompatibility, ISO 17665-1 and ISO 14937 for sterilization), material specifications (e.g., ASTM F136 for Ti-6Al-4V ELI alloy), and internal design parameters and software validation criteria.
8. The sample size for the training set
- Not applicable. This is not a machine learning/AI device requiring a training set.
9. How the ground truth for the training set was established
- Not applicable.
FDA 510(k) Clearance Letter - Preat Abutments
Page 1
U.S. Food & Drug Administration
10903 New Hampshire Avenue
Silver Spring, MD 20993
www.fda.gov
Doc ID # 04017.07.05
Preat Corporation
℅ Chris Brown
Manager
Aclivi, LLC
3250 Brackley Drive
Ann Arbor, Michigan 48105
Re: K243824
Trade/Device Name: Preat Abutments
Regulation Number: 21 CFR 872.3630
Regulation Name: Endosseous Dental Implant Abutment
Regulatory Class: Class II
Product Code: NHA, PNP
Dated: December 12, 2024
Received: April 8, 2025
Dear Chris Brown:
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 (the 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 available 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.
May 8, 2025
Page 2
May 8, 2025
Preat Corporation
℅ Chris Brown
Manager
Aclivi, LLC
3250 Brackley Drive
Ann Arbor, Michigan 48105
Re: K243824
Trade/Device Name: Preat Abutments
Regulation Number: 21 CFR 872.3630
Regulation Name: Endosseous Dental Implant Abutment
Regulatory Class: Class II
Product Code: NHA, PNP
Dated: December 12, 2024
Received: April 8, 2025
Dear Chris Brown:
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 (the 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 available 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.
K243824 – Chris Brown Page 2
Additional information about changes that may require a new premarket notification are provided in the FDA guidance documents entitled "Deciding When to Submit a 510(k) for a Change to an Existing Device" (https://www.fda.gov/media/99812/download) and "Deciding When to Submit a 510(k) for a Software Change to an Existing Device" (https://www.fda.gov/media/99785/download).
Your device is also subject to, among other requirements, the Quality System (QS) regulation (21 CFR Part 820), which includes, but is not limited to, 21 CFR 820.30, Design controls; 21 CFR 820.90, Nonconforming product; and 21 CFR 820.100, Corrective and preventive action. Please note that regardless of whether a change requires premarket review, the QS regulation requires device manufacturers to review and approve changes to device design and production (21 CFR 820.30 and 21 CFR 820.70) and document changes and approvals in the device master record (21 CFR 820.181).
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 Part 803) for devices or postmarketing safety reporting (21 CFR Part 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reporting-combination-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 Part 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR Parts 1000-1050.
All medical devices, including Class I and unclassified devices and combination product device constituent parts are required to be in compliance with the final Unique Device Identification System rule ("UDI Rule"). The UDI Rule requires, among other things, that a device bear a unique device identifier (UDI) on its label and package (21 CFR 801.20(a)) unless an exception or alternative applies (21 CFR 801.20(b)) and that the dates on the device label be formatted in accordance with 21 CFR 801.18. The UDI Rule (21 CFR 830.300(a) and 830.320(b)) also requires that certain information be submitted to the Global Unique Device Identification Database (GUDID) (21 CFR Part 830 Subpart E). For additional information on these requirements, please see the UDI System webpage at https://www.fda.gov/medical-devices/device-advice-comprehensive-regulatory-assistance/unique-device-identification-system-udi-system.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 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-devices/medical-device-safety/medical-device-reporting-mdr-how-report-medical-device-problems.
Page 3
K243824 – Chris Brown Page 3
For comprehensive regulatory information about medical devices and radiation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medical-devices/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-devices/device-advice-comprehensive-regulatory-assistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Andrew I. Steen -S
Andrew I. Steen
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
Page 4
DEPARTMENT OF HEALTH AND HUMAN SERVICES
Food and Drug Administration
Form Approved: OMB No. 0910-0120
Expiration Date: 07/31/2026
Indications for Use
See PRA Statement below.
510(k) Number (if known)
Device Name
Preat Abutments
Indications for Use (Describe)
Preat Abutments are intended to be used in conjunction with endosseous dental implants in the maxillary or mandibular arch to provide support for single-unit or multi-unit prosthetic restorations.
All digitally designed CAD/CAM customizations for Preat Abutments are intended to be sent to a Preat validated Milling Center for manufacture or to be designed and manufactured according to a validated digital dentistry workflow. The workflow system integrates multiple components of the digital dentistry workflow: scan files from intra-oral and lab (desktop) scanners, CAD software, CAM software, milling machine and associated tooling and accessories.
Preat Abutments are compatible with the following third-party implant restorative platforms:
| Compatible Third-Party Implant Systems | Implant Body Diameter (mm) | Implant Platform Diameter (mm) |
|---|---|---|
| 3i OSSEOTITE® Certain® | 3.25 | 3.4 |
| 4.0 | 4.1 | |
| 5.0 | 5.0 | |
| 6.0 | 6.0 | |
| Astra Tech OsseoSpeed™ | 3.0 | 3.0 |
| 3.5, 4.0 | 3.5/4.0 | |
| 4.5, 5.0 | 4.5/5.0 | |
| Astra Tech OsseoSpeed™ Plus (OsseoSpeed™ EV) | 3.0 (3.0S) | 3.0 |
| 3.6 (3.6S) | 3.6 | |
| 4.2 (4.2C, 4.2S) | 4.2 | |
| 4.8 (4.8C, 4.8S) | 4.8 | |
| 5.4 (5.4S) | 5.4 | |
| BioHorizons® Tapered Internal | 3.0 | 3.0 |
| 3.5 | 3.5 | |
| 4.0 | 4.5 | |
| HIOSSEN ET III | 3.5 | Mini |
| 4.0, 4.5, 5.0, 6.0, 7.0 | Regular | |
| Implant Direct Legacy | 3.2 | 3.0 |
| 3.7, 4.2 | 3.5 | |
| 4.7, 5.2 | 4.5 | |
| 5.7, 7.0 | 5.7 | |
| Keystone PrimaConnex™ | 3.5 | 3.5 (SD) |
| 4.1 | 4.1 (RD) | |
| 5.0 | 5.0 (WD) | |
| MegaGen AnyRidge | 3.5, 4.0, 4.5, 5.0, 5.5 | 3.5 |
| Neodent® GM™ Helix | 3.5, 3.75, 4.0, 4.3, 5.0, 6.0, 7.0 | 3.0 |
| Neoss | 3.5, 4.0, 4.5, 5.0, 5.5 | 4.1 |
| Nobel Biocare™ NobelActive® | 3.0 | 3.0 |
| 3.5 | NP | |
| 4.3, 5.0 | RP | |
| Nobel Biocare™ NobelReplace® | 3.5 | NP |
| 4.0, 4.3, 5.0 | RP | |
| 5.0 | WP | |
| 6.0 | 6.0 | |
| Straumann™ BLX | 3.75, 4.0, 4.5 (RB) | RB |
| 5.0, 5.5, 6.5 (WB) | WB | |
| Straumann® Bone Level | 3.3 | NC |
| 4.1, 4.8 | RC | |
| Straumann® Tissue Level | 3.3, 4.1, 4.8 | RN |
| 4.8, 6.5 | WN | |
| Zimmer Screw-Vent®/ Tapered Screw-Vent® | 3.3, 3.7, 4.1 | 3.5 |
| 4.7 | 4.5 | |
| 6.0 | 5.7 |
FORM FDA 3881 (8/23) Page 1 of 2
Page 5
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)
CONTINUE ON A SEPARATE PAGE IF NEEDED.
This section applies only to requirements of the Paperwork Reduction Act of 1995.
DO NOT SEND YOUR COMPLETED FORM TO THE PRA STAFF EMAIL ADDRESS BELOW.
The burden time for this collection of information is estimated to average 79 hours per response, including the time to review instructions, search existing data sources, gather and maintain the data needed and complete and review the collection of information. Send comments regarding this burden estimate or any other aspect of this information collection, including suggestions for reducing this burden, to:
Department of Health and Human Services
Food and Drug Administration
Office of Chief Information Officer
Paperwork Reduction Act (PRA) Staff
PRAStaff@fda.hhs.gov
"An agency may not conduct or sponsor, and a person is not required to respond to, a collection of information unless it displays a currently valid OMB number."
FORM FDA 3881 (8/23) Page 2 of 2
Page 6
510(k) Summary – K243824
Preat Corporation
Preat Abutments
May 7, 2025
ADMINISTRATIVE INFORMATION
Manufacturer Name: Preat Corporation
2625 Skyway Dr, Suite B
Santa Maria, CA 93455
Telephone: +1 800 232-7732
Fax: n/a
Official Contact: Nicholas Grassel, Manager-Product Development
Email: ngrassel@preat.com
DEVICE NAME AND CLASSIFICATION
Trade/Proprietary Name: Preat Abutments
Common Name: Abutment, Implant, Dental, Endosseous
Regulation Name: Endosseous dental implant abutment
Regulation Number: 21 CFR 872.3630
Device Class: Class II
Product Code: NHA, PNP
Review Panel: Dental Products Panel
Reviewing Branch: Ophthalmic, Anesthesia, Respiratory, ENT and Dental Devices (OHT1)
Dental Devices (DHT1B)
PREDICATE DEVICE INFORMATION
The devices within this submission are substantially equivalent in indications, intended use and design principles to the following Primary Predicate and Reference devices:
| 510(k) | Primary Predicate Device Name | Company Name |
|---|---|---|
| K220823 | Preat Abutments | Preat Corporation |
| 510(k) | Reference Device Name | Company Name |
|---|---|---|
| K183518 | Preat Abutments | Preat Corporation |
| K222044 | Elos Accurate® Customized Abutment | Elos Medtech Pinol A/S |
| K200100 | Abutment Design | 3Shape A/S |
| K193352 | Abutmentcad | Exocad GmbH |
INTENDED USE / INDICATIONS FOR USE
Preat Abutments are intended to be used in conjunction with endosseous dental implants in the maxillary or mandibular arch to provide support for single-unit or multi-unit prosthetic restorations.
All digitally designed CAD/CAM customizations for Preat Abutments are intended to be sent to a Preat validated Milling Center for manufacture or to be designed and manufactured according to a validated digital dentistry workflow. The workflow system integrates multiple components of the digital dentistry workflow: scan files from intra-oral and lab (desktop) scanners, CAD software, CAM software, milling machine and associated tooling and accessories.
Page 1 of 8
Page 7
Page 2 of 8
Preat Abutments are compatible with the following third-party implant restorative platforms:
| Compatible Third-Party Implant Systems | Implant Body Diameter (mm) | Implant Platform Diameter (mm) |
|---|---|---|
| 3i OSSEOTITE® Certain® | 3.25 | 3.4 |
| 4.0 | 4.1 | |
| 5.0 | 5.0 | |
| 6.0 | 6.0 | |
| Astra Tech OsseoSpeed™ | 3.0 | 3.0 |
| 3.5, 4.0 | 3.5/4.0 | |
| 4.5, 5.0 | 4.5/5.0 | |
| Astra Tech OsseoSpeed™ Plus (OsseoSpeed™ EV) | 3.0 (3.0S) | 3.0 |
| 3.6 (3.6S) | 3.6 | |
| 4.2 (4.2C, 4.2S) | 4.2 | |
| 4.8 (4.8C, 4.8S) | 4.8 | |
| 5.4 (5.4S) | 5.4 | |
| BioHorizons® Tapered Internal | 3.0 | 3.0 |
| 3.5 | 3.5 | |
| 4.0 | 4.5 | |
| HIOSSEN ET III | 3.5 | Mini |
| 4.0, 4.5, 5.0, 6.0, 7.0 | Regular | |
| Implant Direct Legacy | 3.2 | 3.0 |
| 3.7, 4.2 | 3.5 | |
| 4.7, 5.2 | 4.5 | |
| 5.7, 7.0 | 5.7 | |
| Keystone PrimaConnex™ | 3.5 | 3.5 (SD) |
| 4.1 | 4.1 (RD) | |
| 5.0 | 5.0 (WD) | |
| MegaGen AnyRidge | 3.5, 4.0, 4.5, 5.0, 5.5 | 3.5 |
| Neodent® GM™ Helix | 3.5, 3.75, 4.0, 4.3, 5.0, 6.0, 7.0 | 3.0 |
| Neoss | 3.5, 4.0, 4.5, 5.0, 5.5 | 4.1 |
| Nobel Biocare™ NobelActive® | 3.0 | 3.0 |
| 3.5 | NP | |
| 4.3, 5.0 | RP | |
| Nobel Biocare™ NobelReplace® | 3.5 | NP |
| 4.0, 4.3, 5.0 | RP | |
| 5.0 | WP | |
| 6.0 | 6.0 | |
| Straumann™ BLX | 3.75, 4.0, 4.5 (RB) | RB |
| 5.0, 5.5, 6.5 (WB) | WB | |
| Straumann® Bone Level | 3.3 | NC |
| 4.1, 4.8 | RC | |
| Straumann® Tissue Level | 3.3, 4.1, 4.8 | RN |
| 4.8, 6.5 | WN | |
| Zimmer Screw-Vent®/ Tapered Screw-Vent® | 3.3, 3.7, 4.1 | 3.5 |
| 4.7 | 4.5 | |
| 6.0 | 5.7 |
DEVICE DESCRIPTION
The purpose of this submission is to expand the use of Preat Abutments, specifically the titanium blank abutment design, to be used in a validated equipment CAD/CAM workflow where specific abutment design software, milling machines and tooling have been validated to work with the previously cleared components in K220823 and K183518.
This submission includes a titanium blank design which is compatible with sixteen (16) implant system, with a distinct connection platform, as well as varying implant diameters and implant platform diameters, for each system.
Page 2 of 8
Page 8
Page 3 of 8
The Subject device abutments may be placed in implants located in the mandibular or maxillary arches. The Subject device abutments are compatible with implant body diameters that range from 3.0 mm to 7.0 mm and implant platform diameters which range from 2.9 to 6.0 mm.
All abutments and screws are manufactured from Ti-6Al-4V ELI alloy conforming to ASTM F136 and are provided non-sterile to the end user.
The design parameters for the CAD/CAM Titanium Blank custom abutment are:
- Minimum wall thickness – 0.5 mm to 0.9 mm (varies by implant line);
- Minimum post height for single-unit restorations (length above the abutment collar / gingival height)– 4.0 mm;
- Maximum Angle – 30°*; and
- Minimum gingival height – 0.5 mm;
- Maximum gingival height – 1.5 mm to 4.5 mm (varies by implant line).
*Astra Tech® OsseoSpeed™ Plus (OsseoSpeed™ EV) compatible are limited to 0° maximum correction angle.
The minimum and maximum abutment design parameters listed above correspond to the abutment designs used in the mechanical testing data provided in the sponsor's K220823 and K183518 device submissions.
All digitally designed CAD/CAM customizations for Preat Abutments are intended to be sent to a Preat validated Milling Center for manufacture or to be designed and manufactured according to a validated digital dentistry workflow which includes: Scan files from Intra-Oral and Desktop Scanners, CAD software, CAM software, a Milling machine and associated tooling and accessories.
PERFORMANCE DATA
Non-clinical data submitted to demonstrate substantial equivalence included: reverse engineering of OEM implant bodies, OEM abutments, and OEM abutment screws to confirm compatibility; static compression and compression fatigue testing according to ISO 14801 and an assessment performed for MR Safety. For each compatible OEM implant line, except Astra Tech OsseoSpeed EV, worst-case constructs were subjected to static compression and compression fatigue testing.
Software verification included testing of restrictions that prevent design of components outside of the stated design parameters. In addition, the abutment design library was validated to demonstrate that the established design limitations and specifications are locked and cannot be modified by the user. To address the potential risk of damage to the implant-abutment connection geometry during the milling of the patient-matched portions of the abutment blanks, validation testing of the CAM restriction zones was conducted, including verification to show avoidance of damage or modifications of the connection geometry, and locking of restriction zones from user editing in the CAM software.
Biocompatibility has been demonstrated through the sponsor's K220823 device testing according to ISO 10993-1, and ISO 10993-5. Sterilization validation was demonstrated through and leveraged from the sponsor's K220823 device testing according to ISO 17665-1 and ISO 14937.
Non-clinical worst-case MRI review was performed to evaluate the Subject device including all compatible implant fixtures, abutments, bars, and fixation screws and their respective material composition in the MRI environment using scientific rationale and published literature (e.g., Woods, Terry O., Jana G. Delfino, and Sunder Rajan, "Assessment of Magnetically Induced Displacement Force and Torque on Metal Alloys Used in Medical Devices." Journal of Testing and Evaluation 49.2 (2019): 783-795). Rationale addressed parameters per the FDA guidance "Testing and Labeling Medical Devices for Safety in the Magnetic Resonance (MR) Environment," including magnetically induced displacement force and torque.
Page 3 of 8
Page 9
Page 4 of 8
No clinical or animal data is included in this premarket notification.
EQUIVALENCE TO MARKETED DEVICE
The Subject device is substantially equivalent in Indications for Use, Technological Characteristics and design principles to Primary Predicate and Reference devices listed above. The Summary tables at the end of this section compare the Subject device and Primary Predicate/Reference devices.
Indications for Use
The Indications for Use Statement (IFUS) of the Subject device combines the compatible implant systems of the sponsor's K220823 and K183518 Indications for Use Statements. The intended use with endosseous dental implants in the maxillary or mandibular arch to provide support for single-unit or multi-unit prosthetic restorations is the same for the Subject device and the sponsor's K220823 and K183518 devices. The Subject device does not include titanium base abutments which are included in the K220823 and K183518 submissions, so it does not reference this abutment design in the IFUS. The Subject device and the sponsor's K220823 and K183518 devices share the same intention to be sent to a Preat validated milling center for final manufacturing.
The IFUS of the Subject device and the K222044 Reference device are highly similar. They both share the same intended use in conjunction with dental implants to provide support for single-unit or multi-unit prosthetic restorations. They both share a common intention of the design and manufacturing of the final abutment by means of a defined, digital dentistry validated workflow. The Subject device and K222044 Reference device share similar compatible implant systems. Additionally, the Subject device lists both intra-oral and laboratory scanners as opposed to only intra-oral. Differences in compatible implant systems, and types of scanners identified in the workflow, do not change the intended use of the Subject and Reference device to provide support for single or multi-unit prosthetic restorations to restore chewing function.
None of the minor differences in Indications for Use Statements impact substantial equivalence because all IFUS express equivalent intended use to facilitate dental prosthetic restorations, and the indications are expressed equivalently using different specific wording.
Technological Characteristics
Overall, the Subject device is highly similar to the Primary Predicate and Reference devices. The FDA product code, device regulation and intended use of the Subject, Primary Predicate and Reference devices to provide functional and esthetic rehabilitation of the maxilla and mandible to restore chewing function are the same for the Primary Predicate and Reference devices.
Primary Predicate Device K220823 Preat Corporation Preat Abutments
The Subject and K220823 Primary Predicate device titanium abutment design is the same. The list of K220823 compatible implants and platform diameters are included in the Subject device. Subject device abutment design parameters for the common compatible implant systems are the same as the K220823 device. The Subject device materials, connection type, prosthesis attachment, supported restoration type, biocompatibility and sterilization method are the same as the K220832 device. The minimum Subject device compatible implant platform diameter is supported by the K220832 device. The Subject and K220832 device are intended to be manufactured by means of a validated milling center workflow. The Subject device differs in that it may also be manufactured by means of a validated digital dentistry workflow. This minor difference in manufacturing process does not impact the substantial equivalence of the intended use of the device and is supported by non-clinical bench testing and workflow software/equipment validation.
Page 4 of 8
Page 10
Page 5 of 8
Reference Device K183518 Preat Corporation Preat Abutments
The Subject and K183518 Reference device titanium abutment design is the same. The list of K183518 compatible implants and platform diameters are included in the Subject device. Subject device abutment design parameters for the common compatible implant systems are the same as the K183518 Reference device. The Subject device materials, connection type, prosthesis attachment, supported restoration type, biocompatibility and sterilization method are the same as the K183518 Reference device. The maximum Subject device compatible implant platform diameter is supported by the K183518 Reference device. The Subject and K183518 Reference device are intended to be manufactured by means of a validated milling center workflow. The Subject device differs in that it may also be manufactured by means of a validated digital dentistry workflow. This minor difference in manufacturing process does not impact the substantial equivalence of the intended use of the device and is supported by non-clinical bench testing and workflow software/equipment validation.
Reference Device K222044 Elos Medtech Pinol A/S Elos Accurate® Customized Abutment
The Subject and K222044 Reference device titanium abutment design are highly similar. The list of K222044 compatible implants and platform diameters are similar to the Subject device. Subject device abutment design parameters are similar to the K222044 Reference device. The Subject device materials, connection type, prosthesis attachment, and supported restoration types are the same as the K222044 Reference device. The Subject and K222044 Reference device are intended to be manufactured by means of a validated digital dentistry workflow which adds the secondary PNP product code. The validated digital dentistry workflow of the Subject device is supported by the K222044 Reference device and is also supported by non-clinical bench testing and workflow software/equipment validation.
Ultimately there are no changes to the technology, mode of action, intended use or design parameters of the Subject device relative to sponsor's Primary Predicate and Reference devices. The only difference between the Primary Predicate and Reference devices and the Subject device is the additional option of being manufactured by means of a validated digital dentistry workflow. The digital dentistry workflow path is supported by the K222044 Reference device and validated through non-clinical bench testing and workflow software/equipment validation.
CONCLUSION
Overall, the Indications for Use statements for the Subject, Primary Predicate and Reference devices are highly similar.
Overall, the Technological Characteristics, mode of operation and materials of the Subject device are substantially equivalent to that of the sponsor's Primary Predicate device with the additional compatible implant systems supported by sponsor's Reference device. The design and manufacturing workflows of the Subject and K222044 Reference device are highly similar.
Overall, the data included in this premarket notification demonstrates substantial equivalence of the Subject device to the sponsor's Primary Predicate device with digital dentistry workflow technology supported by the K222044 Reference device. Any differences between the Primary Predicate and Reference device digital dentistry workflows are supported by non-clinical bench testing. The basis for the belief that the Subject device is substantially equivalent to the Primary Predicate device and is summarized in the following comparison tables.
Page 5 of 8
Page 11
Page 6 of 8
Comparison of Indications for Use Statements
| Subject DevicePreat AbutmentsPreat Corporation | Primary Predicate DevicePreat AbutmentsPreat CorporationK220823 | Reference DevicePreat AbutmentsPreat CorporationK183518 |
|---|---|---|
| Preat Abutments are intended to be used in conjunction with endosseous dental implants in the maxillary or mandibular arch to provide support for single-unit or multi-unit prosthetic restorations.All digitally designed CAD/CAM customizations for Preat Abutments are intended to be sent to a Preat validated Milling Center for manufacture or to be designed and manufactured according to a validated digital dentistry workflow. The workflow system integrates multiple components of the digital dentistry workflow: scan files from intra-oral and lab (desktop) scanners, CAD software, CAM software, milling machine and associated tooling and accessories.Preat Abutments are compatible with the following third-party implant restorative platforms:[Full compatibility table with all implant systems] | Preat Abutments are intended to be used in conjunction with endosseous dental implants in the maxillary or mandibular arch to provide support for single-unit or multi-unit prosthetic restorations. The Titanium Base abutments consists of two major parts. Specifically, the titanium base and the mesostructured components make up a two-piece abutment.All digitally designed custom abutments, superstructures, and/or hybrid crowns for use with Titanium Bases or Titanium Blanks are to be sent to a Preat validated milling center for manufacture.Compatible Implant Systems[Partial compatibility table with specific systems] | Preat Abutments are intended to be used in conjunction with endosseous dental implants in the maxillary or mandibular arch to provide support for single-unit or multi-unit prosthetic restorations. The Titanium Base abutments consists of two major parts. Specifically, the titanium base and mesostructured components make up a two-piece abutment.All digitally designed custom abutments, superstructures, and/or hybrid crowns for use with Titanium Base or Titanium Blank are to be sent to a Preat validated milling center for manufacture.Compatible Implant Systems[Extended compatibility table with additional systems] |
Page 6 of 8
Page 12
Page 7 of 8
| Subject DevicePreat AbutmentsPreat Corporation | Reference DeviceElos Accurate® Customized AbutmentElos Medtech Pinol A/SK222044 |
|---|---|
| Preat Abutments are intended to be used in conjunction with endosseous dental implants in the maxillary or mandibular arch to provide support for single-unit or multi-unit prosthetic restorations.All digitally designed CAD/CAM customizations for Preat Abutments are intended to be sent to a Preat validated Milling Center for manufacture or to be designed and manufactured according to a validated digital dentistry workflow. The workflow system integrates multiple components of the digital dentistry workflow: scan files from intra-oral and lab (desktop) scanners, CAD software, CAM software, milling machine and associated tooling and accessories.Preat Abutments are compatible with the following third-party implant restorative platforms:[Full compatibility table] | The Elos Accurate® Customized Abutments are intended for attaching to dental implants in order to provide basis for single or multiple tooth prosthetic restorations. The Elos Accurate® Customized Abutment will be attached to a dental implant using the included Elos Prosthetic screw.The Elos Accurate® Customized Abutments are compatible with the implant systems listed in Table 1:Table 1.[Platform compatibility table with specific systems]All digitally designed CAD/CAM customizations for the Elos Accurate® Customized Abutments are only intended to be designed and manufactured according to digital dentistry workflow. The workflow system integrates multiple components of the digital dentistry workflow: scan files from Intra-Oral Scanners, CAD software, CAM software, milling machine and associated tooling and accessories. |
Page 7 of 8
Page 13
Page 8 of 8
Comparison of Technological Characteristics
| Comparison | Subject DevicePreat AbutmentsPreat Corporation | Primary Predicate DevicePreat AbutmentsPreat CorporationK220823 | Reference DevicePreat AbutmentsPreat CorporationK183518 | Reference DeviceElos Accurate® Customized AbutmentElos Medtech Pinol A/SK222044 |
|---|---|---|---|---|
| FDA Product Code | NHA, PNP | NHA | NHA | NHA, PNP |
| Regulation | 21 CFR 872.3630 | 21 CFR 872.3630 | 21 CFR 872.3630 | 21 CFR 872.3630 |
| Device Class | Class II | Class II | Class II | Class II |
| Prescription Device | Yes | Yes | Yes | Yes |
| Intended Use | Functional and esthetic rehabilitation of the edentulous maxilla and mandible. | Functional and esthetic rehabilitation of the edentulous maxilla and mandible. | Functional and esthetic rehabilitation of the edentulous maxilla and mandible | Functional and esthetic rehabilitation of the edentulous maxilla and mandible |
| Reason for Predicate/Reference | Not applicable | Abutment design, abutment parameters, sterilization, biocompatibility | Abutment design, abutment parameters, sterilization, biocompatibility | Validated digital dentistry workflow technology |
| Abutment Design | Titanium BlankMinimum wall thickness – 0.5 mm.Minimum post height for single-unit restoration – 4.0 mm.Maximum Angle – 30° *.Maximum gingival height – 1.5 mm to 4.5 mm (varies by implant line).*Astra Tech® OsseoSpeed™ Plus (OsseoSpeed™ EV)-compatible 3.6 mm and larger diameter abutments are limited to 0° maximum correction angle. | Titanium BlankMinimum wall thickness – 0.5 mm.Minimum post height for single-unit restoration – 4.0 mm.Maximum Angle – 30° *.Maximum gingival height – 2.0 mm to 4.5 mm (varies by implant line).*Astra Tech® OsseoSpeed™ Plus (OsseoSpeed™ EV)-compatible 3.6 mm and larger diameter abutments are limited to 0° maximum correction angle. | Titanium BlankMinimum wall thickness – 0.5 mm.Minimum post height for single-unit restoration – 4.0 mm.Maximum Angle – 30°.Maximum gingival height – 1.5 mm to 2.65 mm (varies by implant line). | Titanium BlankMinimum wall thickness – 0.4 to 0.5 mm (varies by implant line).Minimum post height for single-unit restoration – 4.0 mm.Maximum Angle – 20° or 30° (varies by implant line).Maximum gingival height – 5 mm. |
| Material (Abutment and Screw) | Ti-6AL-4V Alloy | Ti-6AL-4V Alloy | Ti-6AL-4V Alloy | Steam sterilization – End User |
| Abutment/Implant Interface | Internal Connection | Internal Connection | Internal Connection | Internal Connection |
| Prosthesis Attachment | Cement-retainedScrew-retained | Cement-retainedScrew-retained | Cement-retainedScrew-retained | Cement-retainedScrew-retained |
| Restoration | Single-unitMulti-unit | Single-unitMulti-unit | Single-unitMulti-unit | Single-unitMulti-unit |
| Implant Platform Diameter (mm) | 2.9-6.0 | 2.9-5.4 | 3.0-6.0 | 3.0-6.0 |
| Design Workflow | Intra-Oral or Desktop Dental Scanner3Shape Abutment Designerexocad AbutmentCADValidated Milling Center | Validated Milling Center | 3Shape scanner (3Shape A/S),3Shape Abutment Designer Software (3Shape A/S) – K151455 | |
| Manufacturing Workflow | Digital Dental – TitanHyperdent | Validated Milling Center | Validated Milling Center | CORiTEC milling unit (imes-icore) |
| Sterilization Method | Steam sterilization – End User | Steam sterilization – End User | Steam sterilization – End User | Steam sterilization – End User |
Page 8 of 8
§ 872.3630 Endosseous dental implant abutment.
(a)
Identification. An endosseous dental implant abutment is a premanufactured prosthetic component directly connected to the endosseous dental implant and is intended for use as an aid in prosthetic rehabilitation.(b)
Classification. Class II (special controls). The guidance document entitled “Class II Special Controls Guidance Document: Root-Form Endosseous Dental Implants and Endosseous Dental Implant Abutments” will serve as the special control. (See § 872.1(e) for the availability of this guidance document.)