Just to address the point that the Buddha’s tooth does not look like a human tooth, if we look at the description of the Buddha, he definitely did not sound like a typical human being. Finely webbed toes and fingers? Thousand-spoked wheel sign on feet? Hands reaching below the knees? With those kind of descriptions, I am not the least surprised if Buddha’s teeth did not conform to traditional dimensions!
From Wikipedia (
http://en.wikipedia.org/wiki/Physical_characteristics_of_the_Buddha), it says that the Buddha is traditionally regarded as having the Thirty-two Characteristics of a Great Man (Skt. mahapurusa laksa?a). These thirty-two characteristics are also regarded as being present in cakravartin kings as well.
The Digha Nikaya, in the "Discourse of the Marks" (Pali: Lakkha?a Sutta) (DN 30) enumerates and explains the 32 characteristics. These are also enumerated in the Brahmayu Sutta of the Majjhima Nikaya (MN 91).
The 32 major characteristics are:
1. Level feet
2. Thousand-spoked wheel sign on feet
3. Long, slender fingers
4. Pliant hands and feet
5. Toes and fingers finely webbed
6. Full-sized heels
7. Arched insteps
8. Thighs like a royal stag
9. Hands reaching below the knees
10. Well-retracted male organ
11. Height and stretch of arms equal
12. Every hair-root dark colored
13. Body hair graceful and curly
14. Golden-hued body
15. Ten-foot aura around him
16. Soft, smooth skin
17. Soles, palms, shoulders, and crown of head well-rounded
18. Area below armpits well-filled
19. Lion-shaped body
20. Body erect and upright
21. Full, round shoulders
22. Forty teeth
23. Teeth white, even, and close
24. Four canine teeth pure white
25. Jaw like a lion
26. Saliva that improves the taste of all food
27. Tongue long and broad
28. Voice deep and resonant
29. Eyes deep blue
30. Eyelashes like a royal bull
31. White urn a curl that emits light between eyebrows
32. Fleshy protuberance on the crown of the head