<p>I am currently working on parts for a custom prosthesis.</p>

<p>My main concern at the moment is to find biocompatible materials that can be 3D printed from a UP or a Reprap.
The piece would need to be in contact with the skin for extended periods of time, probably around 17 hours a day on average.</p>

<p>The main concerns I have are:</p>

<ul>
<li>Skin reactions caused by prolonged contact</li>
<li>Skin reactions and bruising caused by friction</li>
<li>Degradation of the materials due to prolonged exposure to skin secretions and sweat</li>
<li>Risks of toxicity in the compounds generated by the aforementioned material degradation</li>
</ul>

<p><strong>Which materials can you recommend?</strong> </p>

<p><strong>Any extensive data (from testing) would be greatly appreciated.</strong></p>

[{'answer_id': 169, 'author': 'Adam Davis', 'author_id': 16, 'author_profile': 'https://3dprinting.stackexchange.com/users/16', 'pm_score': 2, 'selected': False, 'text': '<p>There are printers designed for medical use, and the manufacturers supply them with varying levels of <a href="http://www.medicalplasticsnews.com/opinion/passing-the-test_1/" rel="nofollow">certification and testing</a>, however I\'ve not seen a filament manufacturer certify their material as bio-compatible separate from the printer. The printing process changes the material slightly in the best case (and significantly with poor temperature control or badly set parameters), so even if bio-compatible filament were found, the resulting product might not achieve the same level of bio-compatibility.</p>\n\n<p>If your intent is to use hobbyist level machine for medical purposes, you might simply want to use an interface, such as a sock or a molded/cast polymer that you know to be bio-compatible between the printed part and the skin.</p>\n'}, {'answer_id': 8138, 'author': 'Thiago Felipe Navarro', 'author_id': 14297, 'author_profile': 'https://3dprinting.stackexchange.com/users/14297', 'pm_score': -1, 'selected': False, 'text': '<p>If you want to know something about what you are questioning, it is interesting to you to read <a href="http://e-nable.org/resources/prosthetics-students-consultation/" rel="nofollow noreferrer">http://e-nable.org/resources/prosthetics-students-consultation/</a></p>\n\n<p>That\'s a link with complementary information how to print 3D as a volunteer.</p>\n\n<p>I know that is not enough information about products, but I believe Nylon is the best recommend because it is what generally printers are using, though.</p>\n\n<p>This website supports information with Dr. Chang by the e-mail eagle01@rocketmail.com</p>\n\n<p>but there insnt information about the components used in the prosthetics, but I know that Nylon is the best suited to it nowadays. </p>\n\n<p>If you prefer there is a site with makers loging information about PETG:\n<a href="https://www.matterhackers.com/news/how-to-succeed-when-printing-with-petg-filament" rel="nofollow noreferrer">https://www.matterhackers.com/news/how-to-succeed-when-printing-with-petg-filament</a></p>\n'}]
['https://3dprinting.stackexchange.com/questions/156', 'https://3dprinting.stackexchange.com', 'https://3dprinting.stackexchange.com/users/169/']