We just released 1.5.0 of our Android Face Camera App that has improved support for scanning dental bite devices. I like to show you some examples below. They are scanned in HD resolution and the Smoothing is turned OFF (Sharpest). The first example is from Zirkonzhan (thank you) and the second one is home-made from 3 Lego strips taped on a mouth guard.
We will be happy to try your bite devices if you send us one.
We can't easily increase the number of landmarks unless we switch to a different landmark detector, which is not a high priority right now. If you have particular landmarks that you need, please post in feature requests.