Prognathodon gave good information.
A 1-year old boa probably has teeth about as thick as the period in a newspaper article and ~1/16 inch long. The less stress on a tooth, the less likely it will be lost. Yes, snakes also lose teeth when they eating. A buddy of mine collected the poop from a gaboon viper, soaked it in water and broke it into fragments. By the end of a year he had a nice collection of fangs and teeth.
Bullsnakes have given me the largest number of bites (mostly feeding bites) because I've kept more bullsnakes than any other species. They are great animals! But a nervous 7-foot boa constrictor gave me my single worst bite.