By fabricate do you mean physically manufacture? In that case a 5-axis CNC or any 3D printer.
If by fabricate you mean 3D design/replicate/model then using MM is the way to go for a complex shape like that. Kind of inaccurate to just do it by eye though.
If I have not answered your question, please elaborate. What is that anyways?
create those tube the jig is done over a dental model,looking an easy way to frabricate the tubes
You will have to be pretty good at MM to do that, but there was the same question just a few days ago. Read my answer here: https://forums.autodesk.com/t5/meshmixer/creating-bands-in-meshmixer/td-p/8851962
Watch this: https://autode.sk/3aDotV7