After a tooth broke off and the root removed I had an implant before the pandemic - I also had a descaling of 1 root as mrsb did only the specialist did it - then I had a crown totally break off at the gum line & had to have the root removed which came out in pieces, bone implanted to keep the space proper [ decided against an implant ] and all went well, don't even know what my count was. I think it depends on the dentist or specialist - a few years back a specialist was to perform surgery going through the gum to the top of a root that had a broken off piece of instrument from a root canal, now he insisted on a platelet count with a letter from my hematologist that it was ok to perform the surgery. [this makes my teeth sound terrible, but they are good really]
Lman I wish you could use my dentist because he is fantastic - I even fell asleep during a root canal he was doing

I know there are people who are terribly afraid of dental work being done - my dentist's wife is one and she insists on receiving whatever that gas is called before any work done.
And you should tell any doctor or dentist you have ITP, and tell them up front !!!
(oh mrsb the bone marrow I had while in the hospital when 1st diagnosed in 1989 was something I hope never to have to repeat, it was quite painful - after being given a hematologist and I told her about it she told me that had she done the procedure it would not have hurt).