Create addon for blender

I am using Blender for dental to design and create 3D sports mouthguards. However, I am looking to make the process a lot more automated for when I import different data (i.e. different peoples teeth), where it can import and adjust a pre design mouthguard template that is then altered and adjusted to the the target model.

Currently i am using splint addon
https://www.youtube.com/watch?v=83nDJqZdp7g

Reference video of another company
https://www.youtube.com/watch?v=fuYog05y1Y4
it just shows the workflow and what is it which is what i am doing