Page 163 - IJB-8-3
P. 163
Hunag, et al.
A
B
C
Figure 2. (A) Native articular surface was obtained from 48 aligned point clouds using iterative closest points (ICP) algorithm; (B and C)
Design dimension of our PIP joint implant: elliptical-cone stem, bi-condylar metal surface and bi-concave UHMWPE.
context of biological safety to meet ISO10993 standard hook mechanism for the middle phalanx was made of
as well as demonstrating a commitment to the safety ultra-high molecular weight polyethylene (UHMWPE)
and quality. After 3D printing, all components were and manufactured by machine milling (Figure 2C).
acid-etched to remove residual sandblast particles and The manufacturing accuracy was compared with the
cleaned using ultrasonic oscillations . To reduce the design sizes to fabricate product dimensions (elliptical
[10]
frictional resistance of the joint surface movement, the cross-section and the total length of the proximal and
proximal articular surface was subjected to polishing middle phalanx stems) using the SVP manual imaging
and the surface roughness value Ra was controlled measurement system (Arcs Precision Technology Co.,
to be < 0.1 μm. The articular surface component with LTD, Taipei, Taiwan).
International Journal of Bioprinting (2022)–Volume 8, Issue 3 155
