All of the above I suppose. You forgot to add loss of treatment to those who need it. You haven’t specified which services are being limited but presumably something is lost when we limit offerings.
Yes, there is a variety of things you can do to wear down the enamel. A few of the biggest things are: Drinking Coffee or soda, eating acidic foods and not brushing your teeth. Sadly you are not able to grow back your enamel after if it fully gone so it's best to protect your enamel as much as possible.
No. The person has to live with you for the full 12 months.
