L.G.
My understanding is that 3 is the age when you first start going unless you have a problem requiring a visit sooner. My daugther chipped a front tooth shortly after she turned 2 and we went in - all is well - we're going for her second visit next week and she won't be 3 until October - but we figured we'd keep on a 6 month schedule and we're going to try a teeth cleaning this time...we'll see if it happens :-)