What are the benefits of Minimally Invasive Dentistry? According to DR. Tim Rainey, While everyone is reinventing themselves, it might be time to think about Minimally Invasive Preventive Dentistry™. I figured out how to stop at least 80% of all future decay in 1983 and have been sharing this with the rest of dentistry since 1985. Our procedures are so effective that we offer a Permanent, Professional Lifetime warranty on those restorations. A normal tooth occlusal surface will not decay if treated according to these principles.