Is it possible to whiten a half dead/half fake tooth? (photo)

Hi:Unfortunately whitening alone will not solve the problem.  Your best choice is to cover the entire tooth with either bonding or porcelain veneer.Best,Dr. Maddahi

A porcelain veneer or crown is your best option. Whitening will not work on the bonding and since the tooth has had a root canal it would be best to cover the tooth with porcelain. It is weaker since it no longer has nerves. 

Sadly tooth whitening will not give you the smile you want. Internal staining can be lightened with certain types of professional tooth whitening products. Unfortunately the dental materials used to repair your tooth  during your accident can never be whitened. I would suggest porcelain veneers. A good cosmetic dentist can match your new porcelain veneers with the rest of your natural teeth giving you a natural, beautiful smile. Good luck!

Teeth that have had root canals and/or trauma may dis-color over time.  If the whole natural tooth is OK, then internal bleaching can improve the shade but in your case, loosing so much tooth, I would suggest a non-metal post and ceramic crown such as eMax.