Dental crown looks green. (photo)

It seems you have done your research and know about pros and cons about the crowns you want.  The best way to get good bonding is by having good enamel. I would advised to get them done now rather than later.  It would benefit you greatly to have them done while the teeth are in good...

The cosmetics of your veneers is your personal preference. If you do not have them cemented, it can be corrected. If they are cemented, the doctor may be able to polish some of the translucency if it is stained on the facial of the veneer.   Talk to your dentist !

Thank you for posting your question.  I am sorry to hear that you are having pain on your crown after six months.  It may be that you have a pre-existing unaddressed bite imbalance.  Are you aware if you clench or grind your teeth?  If your not sure then be mindful of where your teeth are at res...

This should likely be able to be polished by your dentist if they are feeling grainy as you describe.

Hi:Unfortunately your crown can not be used for the implant in the future.  A new crown has to be made that fits the new implant and abutment which will be different in size than the crown you used to have on your own tooth.Best,Dr. Maddahi

Hi:You are right, using a whitening toothpaste and whitening mouthwas is the best solution.  I would recommend Oral Essentials Whitening Toothpaste and Mouthwash since it can be used daily without any sensitivity.Best,Dr. Maddahi