The bottom line is Pro will be the best choice for dental offices.
What are the new versions?
Windows 7 Starter, Windows 7 Home Premium, Windows 7 Professional, Windows 7 Enterprise, and Windows 7 Ultimate. Windows 7 Home Basic will also be sold, but only to emerging markets.
All Windows 7 Versions–What You Need to Know – OS, Software & Networking by ExtremeTech.