Multi PointClouds to one MODEL

I have multiple depth images (taken from a single human head). I’m trying to create a single head model using these. I will then 3d print this model.

First, I got the models using the DepthImageToPointCloud module.

My question is: How do I combine this model into a single model. What is the best tool for this?
I didn’t know if it was Surface registration or IGT model registration?