The Canon G-6 is already being replaced by dental camera experts like PhotoMed
The new model is the Canon A610/A620 By the way this is the same camera Patterson is using in their new kit. Here is what the new kit contains:
Everything you need, except the computer. Camera, A610: 16MB, A620: 32MB memory card, high quality macro lens, lighting attachment, memory card reader (for fast image transfer to the computer), hard case and Canon image organization software. The camera is completely assembled, all proper menu choices are set, the memory card is formatted and sample images are taken to ensure everything is working properly. The camera is ready to go out of the case.