Bone Remodeling Subroutine

Dear all,

I am a PhD student working on mandibular fixations using some smart materials. At this step I am going to work on simulation of bone remodeling in mandible. I am very new to ABAQUS, however after searching the web, I got the key is using in UMAT coding for this problem (???).  I have the model and also all the equations ready, I'm going to use Stanford theory for bone remodeling which obtain the stimulus from the strains and the stresses. I have never written a UMAT code, and all the existing samples are complicated and completely irrelevant to may case. Does anyone have a bone remodeling UMAT sample? I really need help!!!

Thanks,