Cytotoxicity Testing
Reliable biological evaluation begins with understanding how materials interact with living cells at the most fundamental level. Cytotoxicity Testing assesses whether a material, extract, or chemical leachable induces cell death, inhibits proliferation, disrupts metabolic activity, or causes adverse morphological changes in cultured cells.
At Materials Metric, cytotoxicity testing is performed in accordance with ISO 10993-5 and FDA guidance, providing early, sensitive detection of potential biological hazards arising from residual solvents, unreacted monomers, processing additives, surface contamination, or degradation by-products. These assays deliver rapid, quantitative insight into cellular response, enabling informed decision-making during material selection, formulation development, risk assessment, and regulatory submission preparation before advancing to more complex in-vitro or in-vivo studies.
Uses of Cytotoxicity Testing
โข Early screening of new materials and formulations
โข Assessment of surface treatments, coatings, and residual processing agents
โข Evaluation of extractable chemicals following ISO 10993-12 extraction conditions
โข Batch-to-batch biological safety verification
โข Supporting FDA submissions and ISO 10993 biological evaluation plans
โข Identifying root causes when other biocompatibility endpoints fail
Applications
โข Medical device polymers, elastomers, adhesives, coatings
โข Hydrogels, composites, 3D-printed materials
โข Dental materials and implant surfaces
โข Drug-device combination products
โข Packaging, tubing, and contact materials
โข Regenerative medicine and biomaterial R&D
Sample Analysis Process
1. Study Planning
- Selection of assay format (direct contact, indirect, or extract-based)
- Cell line selection (commonly L929 fibroblasts)
- Determination of extraction conditions per ISO 10993-12
2. Sample Preparation
- Preparation of materials or extracts under controlled conditions
- Sterilization or cleaning (as required)
- Setup of direct or indirect contact configurations
3. Exposure & Measurement
- Incubation of cells with material/extract
- Quantification via metabolic assays (MTT, XTT, AlamarBlue, LDH)
- Microscopic evaluation of cell morphology
- Scoring of cytotoxic response based on viability reduction
4. Data Analysis & Reporting
- Quantitative viability (%)
- Cytotoxicity grade and classification
- Annotated microscopy images
- Interpretation relative to ISO 10993-5 acceptability criteria
- Recommendations if cytotoxic response is observed
Why Choose Materials Metric for Cytotoxicity Testing
Materials Metric delivers robust, regulator-ready cytotoxicity testing with deep scientific interpretation and strict quality oversight.
We provide:
โข ISO 10993-5 Compliant Cytotoxicity Workflows
Our methods follow global standards to ensure your results are accepted by FDA, EU MDR, and international regulatory bodies.
โข ISO 9001:2015 Accredited Quality System
Every step from extraction to reporting is controlled, traceable, and audit-ready, supporting smooth regulatory review.
โข High-Sensitivity Quantitative Assays
We use validated metabolic and morphology-based assays to detect subtle cytotoxic effects that routine screens may miss.
โข Expert Interpretation of Complex Results
Our biomaterials and toxicology specialists provide clear explanations of borderline findings, failure patterns, and root-cause hypotheses.
โข Integrated Chemical + Biological Correlation
Cytotoxicity outcomes are often driven by chemistry.
We can correlate your results with:
โข extractables & leachables
โข surface chemistry
โข thermal & mechanical behavior
โข material processing history
โข Strategic Support for FDA & ISO Submissions
We help you navigate requirements, prepare Biological Risk Assessments, and design next-step testing if needed.
Materials Metric ensures your cytotoxicity evaluation is accurate, defensible, and aligned with your regulatory and R&D goals.
