Is There Any New Treatments for Enamel Peeling off of Teeth?

Yup...classic injection hematoma.  Your blood vessels were disturbed and damaged during your numbing shots.  It's not common, but happens to the best dentists in the world.  Managing these trauma is a headache.  Pressure and time is the best two medicines.  Antibiotics...

I've had this same exact complaint from patients in the past.  They had so much calculus build up which covered up their spaces between the teeth and recessed gums that once they got their teeth thoroughly cleaned, they blame the hygienist that she took their tooth structure or gum tissues...

 The best option for you will be to straighten your teeth with clear braces (Invisalign) of braces with an orthodontist. This will help with the aligment and will help tremendously with biting into your lip. The size of your canine is fine , the angle of the tooth because is misaligned...