I have significant disability, so am very fortunate that I'm treated at the Dublin Dental Hospital. I had to go earlier this month to have a filling replaced, Minor changes, really. I had a call from a Dental Nurse first. Asking if I'd any new cough, runny nose, tummy upsets, etc. Asked if I'd been around anyone with symptoms. Then told me to arrive no sooner than ten mins before my appointment.
As I entered I was asked to use the hand gel, and put on a face mask. When I transferred from my wheelchair to the dental chair, my temp. was taken, and I was asked to remove my glasses and was given a pair of very large goggles to wear. They always ask me to wear goggles, but these appeared to have larger lenses than usual. Dentist removed my mask and disposed of it.
I was then given some antibacterial mouthwash (Corsydal I think) and asked to wash it around my mouth for ninety seconds. This hadn't happened before. The staff at the hospital always wear surgical gowns (most wear scrubs, too), and masks... The only addition was that they wore visors, too.
I had my treatment (Filling repaired, and cleaning). It was more or less as usual. The only change that there was a lot more suction involved (three small suction tubes instead of the usual one) to help to clear any aerosol fluids quickly. At the end of the treatment, the dentist replaced the mask with a new one, I used the hand gel again, and I was able to leave.
All very easy, and it ran very smoothly. I think the fact that this is a teaching hospital, and is hugely state funded meant that there was plenty of PPE available and freely offered. Hope this helps a little. Good luck. Hope your dental treatment works well.