Biting when meeting other dogs

Hi,

So our little one Thor is definitely the dominant type, and has been right from the start even in his litter he was boss, and although I have got everything else under control, and our training is going really well, we have one big issue. When we are out walking and he's off his lead and sees another dog he's like a bullet and he's trying to bite the other dogs face. He doesn't care if the other dog is three times his size he will do the exact same thing to all of them. Generally dogs really don't like to be greeted this way and I can see it becoming a HUGE problem if its not dealt with as soon as possible. But I'm not sure how to go about correcting his behaviour, I have thought to keep him on his lead but to be honest I want both my dogs to be able to play with each other off the lead and feel if I do this then I don't have the oppurtunity to correct him. Does anyone have any tips that may help or any similar experiences?

Thanks

just realised I may have posted this in the wrong part, sorry if i have :-S

Your fine posting this here we can always move it if not.

Are you able to keep Thor on his lead until his is introduced to other dogs first then they could have a play together, this way they will both get the chance to have a good sniff of each other then play.