Forensic dentistry identification help please

[needinghelp]

I am a private investigator trying to find a missing person. Interestingly, I’ve had a lead but am stumped in as far as facial recognition. I was wondering, if you could study the attached image and tell me if the screen capture from a video is possibly the same person as shown cropped in the right based on their top front teeth? Assume the images on the left are taken some years prior to the images on the right. Also, in the left images the guy is opening his mouth wide whereas the right column is a regular smile. Sorry if this is an unusual or improper question. But I if you can help, I can assure you it is for a very good cause. Many thanks for any assistance you can provide.

 

[Miriam martinez]

Lateral and bicuspids don't really match, but the image is very low quality.