Note: This response has been lightly edited for length and clarity.
Dr. Paul Rotunda: As has been noted by many successful people, the best investment is in yourself. This is true no matter what the profession, and dentistry is no different. Continued learning is of paramount importance in our endeavor to provide a consistently excellent service. For me, it was being personally trained by Peter Dawson, DDS, founder of the Dawson Academy. But no matter where you learn it, the anatomical and physiological principles will always apply irrespective of any new technologies or techniques. And understanding them will enable you to provide that consistently excellent service. That will be the best dental investment you can make.