Crown replacement. Can I go to another dentist for a second opinion?

Crown replacement needs to be checked clinically and with xrays prior to be cemented permanently , however since your good dentist has not even cemented the final crown, to be checked, why would you go to another dentist for second opinion for a temporary? unless you have extreme sensitivity or discomfort, or maybe you are not happy with treatment?I do suggest you communicate with your dentist, to express your concerns.Best of Luck

Yes, you can go to another doctor to get difference options and you select the best choice. 

You can always go to another dentist for a second opinion. Be aware they will probably charge you for that opinion. 

As long as you've paid your original dentist the full fee for the crown, it's yours and you can do what you want with it. You could request they use temporary cement so you can seek your second opinion. Then return to your original dentist to permanently cement if you are happy with it. Expect to pay out of pocket for a second opinion as insurance will not cover that doctor's time. Also expect to pay for a recementation appointment with your original doctor to have the crown permanently cemented.