My male Artie is now exactly 2 yrs./3 months old, just a month ago he lost his last baby tooth by natural causes. I'm no expert but I was told by my Breeder that Yorkie's are a high risk when they have any kind/type of "Operation". Since I never planned on getting him "Fixed", he would have had to have Surgery, specifically for the removal of his baby teeth, not to mention it is expensive. It did take a while but it did eventually come out on it's own. I do brush his teeth everyday and have been since he was a puppy,
so he does have extra strong and bright white adult teeth.
I guess I would do what ever I thought was best at the time? It depends on the individual circumstances? Good Luck!