Dental Sesame offers a service that as far as I know is unique. Every day with the online synch all new patient images are uploaded to the Sesame servers. This provides three great benefits.
When patients log in they can view any image and show it to a friend or relative; which drives traffic and referrals to your page.
If you want to do an online consult with a colleague (or three) you can share the images easily.
You have an off site image back up. Sesame does not guarentee the images integrity and does not recommend you rely on this service as a back up. Never the less the images are there just in case.