My oldest son got his first two teeth at 10 weeks! I hauled him into the doctor, thinking he must be sick because of the way he was acting. She did a complete examination and was stunned to find that he had two teeth coming in!
By six months he had six teeth. We joked that he was in the Tooth of the Month Club.
Likewise his 6-yr and 12-yr molars came in WAY ahead of schedule. Now,at 15, he's getting wisdom teeth.
He also started losing baby teeth early and lost them quickly.
As far as I can tell, he's a normal kid who has always been on the early end of the normal developmental schedule. When he was teething, we just used every home remedy plus OTC medicine to combat the pain. Different remedies worked with different teeth.
The peditrician told me that my son's early teeth (and whole early development) showed that I had done everything right nutritionally during my pregnancy and that he had been well-fed and well-loved since birth. I don't know if it was true but it made (and still makes) me feel all warm and tingly.