Psoriatic Arthritis and Dental Issues

I woke up this morning with another broken tooth. This is the fourth in little over a year and the second that has happened when I wasn't chewing or eating. All 4 teeth had been filled over the years ( I'm 67 after all ) and in each case it's been the tooth wall on one side that has broken. It seems to me this can't all be coincidence. I've always attended my dentist for my 6 monthly checks. I was warned early on about the possibility of gum disease but not tooth decay. I started looking online and there's not a lot of information there but a few small studies regarding psoriasis and a link to tooth decay caused by acidic saliva. Anyone else with PsA had this happen to them?