Is a 3D printed anatomy model a medical device?
What the US, EU and UK definitions say about intended purpose, why diagnostic and planning models are different, and our reading for teaching models.
Biocompatible resin, explained
By the Medical 3D Parts editors, The Spool List · Published October 14, 2026
The short answer
Biocompatibility is a property of a validated process (resin, printer, settings, washing, curing and sterilising), not of a bottle of resin. Even resin makers say determining biocompatibility is the device manufacturer's job. A maker with a 'biocompatible' resin cannot make a part safe for the mouth or body, and nothing printed through this site is sold for that.
Some resins are sold as "biocompatible" or for dental or medical use. That rating describes the resin as tested by its manufacturer, under its own process. It does not carry over to a part someone else prints.
What resin makers say
Formlabs, on its BioMed Clear resin: "post-curing is necessary to achieve the safety standards determined by regulatory agencies"; properties "may vary based on part geometry, print orientation, print settings"; "It is the manufacturer's responsibility and its respective customers and end-users to determine the biocompatibility" of printed parts; and "no intended uses are provided for BioMed Resins" [1].
The standard behind it
Biological safety of devices is assessed under ISO 10993-1, whose 2018 edition was replaced by a 2025 edition [2]. The FDA's guidance on using ISO 10993-1 explains how that evaluation supports device submissions [3]. It is a risk-managed evaluation of the finished device, not a label on a raw material.
What this means in practice
- A maker's printer, settings, washing and curing are not a validated process.
- Sterilising printed plastics is not simple: PLA deforms in an autoclave [4].
- So nothing printed through this site is sold as biocompatible, sterile or for use in the mouth or body. For anything that touches a patient, go to your dentist, doctor or a registered manufacturer.
Sources
- Formlabs: BioMed Clear Resin product page (accessed October 14, 2026)
- ISO 10993-1: Biological evaluation of medical devices, Part 1 (ISO page; 2018 edition replaced by the 2025 edition) (accessed October 14, 2026)
- FDA guidance: Use of International Standard ISO 10993-1 (final, September 2023) (accessed October 14, 2026)
- Neijhoft et al., Sterilization of PLA after fused filament fabrication 3D printing, Polymers 2023;15(2):369 (accessed October 14, 2026)
Rules are quoted as the sources state them, checked October 14, 2026. They differ by country and change: check the source before relying on them. This page is general information, not medical, dental or legal advice.
Drafted with AI assistance and checked against the sources above by the Medical 3D Parts editors. Medical 3D Parts is a guide published by The Spool List Ltd. Its buttons lead to The Spool List, our marketplace, which earns a commission from makers on completed orders. Makers are independent people and small workshops, not registered medical device manufacturers or dental laboratories.