I'm in agreement with you. I think the dentist should remove the crown and I have a new one made. The abutment could possibly be used and tightened to the right amount of torque, but it would be better to just remake the abutment also since this problem developed within 4 days. A brand new screw should be used with the abutment. A brand new crown should be made to fit the new abutment as well.
Doug Jopling, DDS
Dallas, TX Area