The application of 3D printing technology in medical device products is rapidly expanding, evolving from early “model prototyping” to “final product manufacturing,” and exhibiting three major characteristics: “personalization, precision, and functionality.” The applications of 3D printing technology can be summarized into the following six major scenarios:
1. Personalized surgical models and navigation templates
Using patient CT/MRI data to directly print 1:1 soft and hard tissue models allows for “physical” assessment and simulation of surgical paths before surgery, reducing intraoperative time and lowering risks; the personalized guides (orthopedic, dental, neurosurgery) have been approved as Class II medical devices, with intraoperative positioning accuracy < 1 mm.
2. Personalized implants (permanent & biodegradable)
– Permanent implants: Titanium alloy acetabular cups, intervertebral fusion devices, thoracic ribs, mandibles, and cranial repair meshes have been approved by NMPA/FDA, with a porous surface structure that matches the elastic modulus of bone, reducing stress shielding.
– Biodegradable implants: Polylactic acid-hydroxyapatite and polyether ether ketone-β-TCP composite materials are used to print bone screws, bone plugs, and jawbone scaffolds, completing Phase II/III clinical trials, and can be replaced by new bone within 1-3 years, avoiding secondary removal.
3. Orthopedic and rehabilitation aids
Personalized clear aligners, scoliosis braces, and prosthetic sockets printed using light-curing/melt extrusion techniques can be formed with a wall thickness of 0.2 mm, reducing weight by over 30%, significantly improving breathability and fit. The latest “multi-wavelength grayscale curing” technology can achieve a modulus gradient of 54-246 MPa within the same resin, balancing rigid support and soft cushioning.
4. Dental and ENT small batch end products
Crowns, bridges, implant guides, denture bases, and cochlear shell components are now routinely printed; crowns printed from cobalt-chromium alloy or zirconia achieve an accuracy of ±35 μm, completing the “oral scan-design-print-sinter-wear” closed loop within 24 hours.
5. Drug delivery and microneedle arrays
3D printing integrates “drugs + carriers” into a single form, achieving zero-order, pulsed, or targeted release; for example, a post-operative implanted 5-fluorouracil sustained-release rod releases >90% of the drug over 28 days, increasing local concentration by 4 times and reducing systemic exposure by 70%.
6. Bioprinting and regenerative medicine (cutting-edge)
Utilizing hydrogels containing cells and photoinitiators, blood vessels, cartilage, and nerve conduits are printed through “multi-wavelength DLP + centrifugal post-processing”; the polymer peripheral nerve repair conduit from 3D Systems-TISSIUM has received FDA De Novo authorization, allowing for non-invasive coverage of damaged nerves, fully degrading within 9 months and being replaced by autologous tissue.
Technical route proportions (2025 market): Material extrusion (54%) > powder bed fusion (17%) > light curing (17%), but light curing is growing fastest in the dental and micro-device fields due to its high precision and good surface quality.
Market size: The global sales of 3D printed medical devices reached $2.7 billion in 2022, and it is expected to grow to $6.9 billion by 2028, with a compound annual growth rate of 17%, approximately four times higher than the overall growth rate of medical devices during the same period.
In summary, 3D printing has upgraded from an “auxiliary tool” to a “clinical end product,” continuously deepening along the path of “in vitro → implantation → regeneration,” providing a practical manufacturing platform for precision medicine and personalized treatment.