Probably not a problem - my son is almost eight and still not a wiggle. I was getting really concerned and paid a ton of money for a panograph, only to find his adult teeth are there - they just don't have any intention of pushing their way out for a while. This is particularly common, I've been told, with kids whose baby teeth came in on the relatively late side (his were not abnormally late, but a bit later than some of his friends). The dentist told me this kind of deviation (while certainly on the more extreme side) does happen. Good luck!