For teeth you want a 5:1 ratio of vit A to D along with a large dose of vit K. They all need each other to do their job properly.
westonprice.org has a lot of good info on vit a/d/k. On one page they state high-vitamin cod liver oil and high-Activator X (whats now knows as vit K) butter oil as the cornerstone of his protocol for reversing dental caries. This protocol not only stopped the progression of tooth decay, but completely reversed it without the need for oral surgery by causing the dentin to grow and remineralize, sealing what were once active caries with a glassy finish. One 14-year-old girl completely healed 42 open cavities in 24 teeth by taking capsules of the high-vitamin cod liver oil and Activator X concentrate three times a day for seven months.