If you think God really wants you to avoid valid medical practices, ask yourself this. Why did God, all knowing and all powerful, gift Man with the insight to come up with these technologies, which have been proven to save lives? Do you honestly think Satan is working through your dental practitioners by helping you avoid jaw infections now, at the cost of the negligible chance of cancer in 50 years time?
A while ago, there was a story about a girl who's parents refused to get medical treatment for her because they believed God would heal her. All I could say to that is, "Why are you slapping God in the face by refusing the healthcare technology that He gifted us with the intelligence to discover?"