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Digital light processing based 3D printing for medical applications
printing platform can flexibly set a series of In addition to the benefits of surgical assistance
manufacturing parameters, including printing and disease analysis, DLP 3D printed disease
time, light intensity, and even the wavelength of model is also applicable to the teaching of clinical
light. Kuang et al. designed a special grayscale medicine, especially the basic subjects of medical
light DLP 3D printing technology. This method education such as human body and pathological
utilizes a grayscale light to print the material that anatomy. For example, this technology can
can be two-stage curing into a 3D structure that quickly print personalized zirconia material
can be printed with relatively high precision and dental teaching model, this personalized teaching
has remarkable changes in mechanical strength model has sufficient dimensional accuracy, and
gradient. A bionic 3D structure with both soft maintains clinical-pathological oral deformity so
muscle and hard bone was created by this printing that students can get an intuitive impression of
technique (Figure 2A). When pressed lightly, oral malformation disease [32,33] .
the muscles are easily squeezed out of shape. 3.2 Implants
However, in the process of pressing the muscles,
the hard bones remain stable . An other group The field of in vivo medical devices that can be
[6]
fabricated spine-shaped phantom for stereotactic printed with DLP-based 3D printers mainly
body radiation therapy and oral cavity model for includes biodegradable or non-degradable human
orthodontics (Figure 2B and C) [30,31] . implants made of various materials, such as metals,

A B C

D E

F G H

Figure 2. Digital light processing 3D printed medical devices: (A) A limb with soft “muscle” and
stiff “bone” , (B) spine-shaped phantom . (C) Oral cavity model , (D) (i) nerve conduit with
[33]
[6]
[32]
microchannels ; (ii) a range of nerve conduits , (E) zirconia dental implant , (F) detoxification
[35]
[34]
[7]
device , (G) toxin sensor , (H) blood senor for measuring glucose, cholesterol, and triglycerides .
[8]
[37]
[36]
16 International Journal of Bioprinting (2020)–Volume 6, Issue 1