How do your son's teeth conditions compare to yours and your spouse's? I'm convinced that some people are luckier than others. My son w/CF is 3 and takes adeks, zantac, enzymes, tobi, albuterol, pulmicort, and has reflux but has clean white teeth and got a good checkup. He brushes 2 or more times per day, but not all that well. His mother can skip tooth brushing and dentist visits for years and have clean cavity free teeth. I am a tooth brushing fanatic and have never missed a 6-month checkup in my life but still get plaque and cavities. I'm hoping my son got his mother's teeth.