Implantation – ISO 10993-6

What Is Implantation — ISO 10993-6?

The implantation assessment examines the local tissue response around a material after it is placed in tissue. The assessment is carried out by histopathologically examining tissue samples taken at defined time points and comparing them against a reference material.

Purpose of Implantation — ISO 10993-6

The purpose is to determine whether the implant causes effects such as inflammation, fibrous capsule formation, necrosis or a foreign body reaction in the surrounding tissue. Effects arising from surface and shape only become visible at this endpoint.

Which Products Is Implantation — ISO 10993-6 Applied To?

Orthopaedic implants and screws
Cardiovascular implants
Absorbable sutures and filler materials
Dental implants and bone grafts
Soft tissue implants

In Which Sectors Is Implantation — ISO 10993-6 Used?

Medical DevicePharmaceuticalsHealthcareBiotechnology

Standards Related to Implantation — ISO 10993-6

ISO 10993-6Local effects after implantation test

Implantation — ISO 10993-6 Conditions

Time points: Short- and long-term assessment points; from the standard, according to the device's period of use
Site: Tissue representing clinical use (muscle, bone or subcutaneous)
Comparison: The tissue response is compared against an accepted reference material
Assessment: Histopathological grading (inflammation, necrosis, capsule thickness, vascularisation)

Equipment for Implantation — ISO 10993-6

Histopathology laboratory (tissue processing, embedding, sectioning, staining)
Microtome and section preparation equipment
Light microscope and image analysis system
Specimen storage and fixation setup

Sample Requirements for Implantation — ISO 10993-6

The specimen must be supplied in its final state, having gone through all series-production processes (including sterilisation).
The surface area and mass of the device in patient contact must be provided.
Material composition, manufacturing aids and coating information, if any, must be shared.
The specimen quantity needed for extraction is calculated from the surface area; this must be confirmed before shipping.
Packaging integrity must be maintained for sterile products.

Duration of Implantation — ISO 10993-6

Assessment points range from weeks to months; long-term points are set according to the device's clinical period of use. Histopathological examination and reporting add to this time.

Implantation — ISO 10993-6 Procedure

1The device's contact duration and the appropriate implantation site are determined.
2The specimen and reference material are prepared sterile.
3Tissue samples are taken and fixed at the defined time points.
4Tissue processing is performed, sections are taken and stained.
5Histopathological examination is performed and scored per the standard's grading table.
6The difference between the specimen and the reference is assessed.
7The result is carried into the biological evaluation report.

Implantation — ISO 10993-6 Acceptance Criteria

The acceptance criterion is selected from the relevant section of the standard according to the device's contact type (surface, externally communicating, implant), contact duration and intended use. The assessment relies not on a single test result but on the biological evaluation plan carried out under ISO 10993-1; this page therefore gives no fixed limit.

Evaluation of Results

The assessment relies on whether the specimen's tissue response is significantly more severe than the reference material's. For absorbable materials, degradation rate and tissue response are interpreted together.

Implantation — ISO 10993-6 Report

Device identification, model and lot number, if any
Device contact type, duration and intended use
Standard and section applied
Extraction or sample preparation conditions
Cell line, test system or test rig used
Controls and their results
Observations, measurement results and assessment
A statement that the result applies only to the specimen submitted for testing

Accreditation

EUROLAB holds internationally recognised accreditation obtained from accreditation bodies party to the IAF and ILAC multilateral recognition arrangements, under ISO/IEC 17025 for laboratory testing, ISO/IEC 17020 for inspection and surveillance, and ISO/IEC 17021-1 and ISO/IEC 17065 for system and product certification. This chain ensures the reports and certificates issued are accepted worldwide.

Whether this test can be offered within accredited scope depends on your product and the standard applied; since accreditation is method-based, the scope is confirmed in writing at the quotation stage.

Scope and authorisations

Related Regulations

EU 2017/745 Medical Device Regulation (MDR)
Medical Device Regulation (Türkiye)
ISO 14971 (risk management for medical devices)
ISO 13485 (medical devices — quality management system)

Medikal Cihaz Testleri — What Does This Testing Field Cover?

The section below describes the field that the Implantation test belongs to; the conditions and acceptance criteria of this particular test are given in the sections above. The scope specific to your product is confirmed in writing at the quotation stage.

Medical device testing shows that a device is safe for the patient and the user and maintains its intended performance. In this family safety is not only about avoiding harm; a device failing to perform its expected function is also treated as a risk. A monitor missing an alarm or a pump delivering the wrong dose is directly a patient safety event.

At the centre of the field is RISK MANAGEMENT, and this is what sets medical apart from other sectors. The risk management process run under ISO 14971 also determines which tests are required. The test list is not copied from a table of standards; it is derived and justified from the device's intended use, the nature and duration of patient contact, the use environment and foreseeable misuse.

Assessment consists of several separate bodies of work, each with its own set of standards. Biocompatibility runs through the ISO 10993 series, electrical device safety through the IEC 60601 series, sterilisation through ISO 11135/11137/17665, packaging through ISO 11607, software through IEC 62304 and usability through IEC 62366. The quality system (ISO 13485) is the framework that binds these together.

Which tests are required is determined by the device's CLASS and its MODE OF CONTACT WITH THE BODY. A product in brief contact with skin and an implant entering the bloodstream do not go through the same test set; the scope is set by a biological evaluation plan prepared under ISO 10993-1. That plan justifies in writing which endpoints are required and why the others are not.

Packaging and sterilisation are taken as seriously as the device itself in this field. For a sterile device the packaging is not a transport container but the barrier that maintains sterility; if the barrier is breached, the device is no longer sterile. Packaging processes are therefore validated and shelf life is supported by real-time ageing data.

For devices containing software, assessment shifts from testing towards PROCESS assurance. IEC 62304 defines which development and verification steps must be followed according to the safety class of the software; the evidence is the traceability of the development process. Testing software does not make it safe — the process record does.

The clinical side is a separate column of the technical file. Test reports show that the device is technically safe; clinical evaluation establishes that the device delivers the intended clinical benefit and that the benefit-risk balance is acceptable. Neither replaces the other.

Method groups in this field

Biocompatibility
Cytotoxicity, irritation, skin sensitisation, systemic toxicity, haemocompatibility, genotoxicity and local effects after implantation. The required endpoints are set by the ISO 10993-1 plan.
Electrical device safety
IEC 60601-1 basic safety and essential performance; EMC, alarm, usability and environmental requirements through the collateral standards.
Sterilisation validation
Validation of sterilisation processes by ethylene oxide, radiation or moist heat; bioburden and sterility assurance level studies.
Packaging
Integrity of the sterile barrier system, seal strength, distribution simulation and shelf-life studies.
Microbiological tests
Bioburden determination, sterility testing, bacterial endotoxin and, where required, carrier validation studies.
Software and usability
IEC 62304 life cycle evidence and use-error focused evaluation under IEC 62366.

Commonly confused in this field

Cytotoxicity alone is not evidence of biocompatibility; the required set of endpoints is determined and justified according to ISO 10993-1.
An ISO 13485 certificate does not confer CE marking; classification under the MDR, the technical file and the notified body process run separately.
Accelerated ageing does not replace real-time ageing; a shelf life claim is supported by real-time data.
A change of material (supplier, pigment, sterilisation method) may require the biological evaluation to be repeated; it is not a silent change.
An assessment made without the collateral and particular standards for IEC 60601-1 is incomplete; which -1-x and -2-x standards were applied must appear in the report.
In vitro diagnostic devices fall under the IVDR rather than the MDR, and laboratory equipment is often on the IEC 61010-1 side.

Which decisions these results support

MDR/IVDR technical file and notified body assessment
Completing the biological evaluation plan
Sterilisation and packaging validation
Determining shelf life and storage conditions
Determining the scope of reassessment after a design change

Related Tests

Frequently Asked Questions About Implantation — ISO 10993-6

Is this endpoint required for every implant?

ISO 10993-1's matrix sets the requirement by contact type and duration. This endpoint is usually not required for devices with short-term surface contact.

Why is it compared against a reference material?

Every implantation produces some tissue response; the response itself is not meaningful on its own. The comparison shows whether the response is more severe than that of an accepted material.