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Material Selection · Medical

Biocompatible.
Sterilizable.
Medical-grade.

Material selection for medical devices. Biocompatibility, sterilization compatibility, regulatory acceptance — different requirements vs industrial.

01 · Key principles

Key principles.

Ti-6Al-4V ELI

Implants

Extra-low interstitial titanium. Spinal, orthopedic, dental implants.

316LVM stainless

Surgical instruments

Vacuum-melted 316L. Surgical instruments, temporary implants.

Cobalt-chrome

Joint replacements

CoCr alloys for hip/knee replacements. High wear resistance.

PEEK-OPTIMA

Spinal cages

USP Class VI PEEK. Radiolucent, biocompatible.

USP VI silicone

Tubing, seals

USP Class VI silicone elastomer. Drug-contact tubing.

316L sanitary

Bioprocess

Electropolished 316L for biopharmaceutical processing.

PETG

Disposables

FDA-grade PETG for disposable medical packaging.

Polypropylene homopolymer

USP VI plastic

Cost-effective USP VI plastic. Syringes, containers.

Glass (USP)

Vials, syringes

USP type I borosilicate glass for parenteral packaging.

FAQ

USP Class VI vs FDA?

Different. USP VI: implant biocompatibility testing. FDA 21 CFR: food/medical contact materials. Application-dependent.

Sterilization compatibility?

Each material/method match. Steam autoclave 121°C: most metals OK. Gamma: most plastics OK with verified material grade. EtO: most materials OK.

Implant materials regulation?

FDA 510(k) required for new implants. Material selection per intended duration. ISO 10993 biocompatibility testing.

Cleanroom requirements?

Final assembly in ISO 7/8 cleanroom for sterile products. Particle-controlled manufacturing.

Documentation chain?

Mill cert through finished part. Lot traceability. 25-year retention typical for permanent implants.

Material grade indicators?

"Surgical grade", "implant grade", "USP VI" — verify exact testing performed. Generic material may not be suitable.

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