Xương Cánh Tay Trái

I had requests for an arm for comparative anatomy purposes and I actually had made one for a colleague, so I'm sharing it now.

Remix of the left arm bones made available under CCBY license by user MySegmenter on the NIH3D Print Exchange. I remeshed the bones to optimize them for 3D printing. The humerus, radius, and ulna can be printed separately or I have added the option for a connected radius and ulna which is easier for demonstrating their articulation with the humerus or for setting a particular bend before gluing. I have included the generic 3mf as well as exported the STL models in the recommended print orientation.

Print settings:

• 0.20 mm layer height, 3 walls, 8% gyroid infill

• tree supports at 40 degrees (to make sure they don't fall!)

  • initial layer expansion = 5 mm

  • top z distance = 0.20 mm

  • top interface layers = 2

  • top interface spacing = 0

  • branch diameter = 2 mm

I added extra supports since these models are tall and skinny to make sure they don't fall over, but the supports come off very easily especially with matte PLA. I used Sunlu matte bone white. At the angles I have them set to, they fit fine on the Bambu A1.