I am ten days post op - posterior approach. Can I apply the same exercises here as well?

I hope all went well with your procedure.  I would ask the physician if he/she have any specific restrictions of movement and for how long.  Posterior approaches often have restrictions in flexion, adduction and internal rotation at least for the first 6 months to prevent dislocation.  the thing now is the surgery and hardware is getting so good that the risk of subluxation is greatly reduced for the posterior approaches.  Follow your physicians protocols and expand into the movement provided it doesn't go directly against the precautions or contraindications.  Good luck.