The profession of dentistry has changed enormously. From the heyday of single practitioners working four days a week, corporate dentistry now provides consumers with more convenient hours, better locations, and care that's covered by insurance. Today, the easiest hygiene appointments to sell in metro areas are between 6:00 p.m. and 9:00 p.m. Consumer demand has changed, and private practitioners who don't evolve to meet this new demand will see...