I have been using a Canon Rebel with dental specific attachments for years and am very pleased. Check out Photomed for a dental specific kit.
Canon unveiled a new digital SLR late Wednesday night, the EOS Rebel XSi. The new camera replaces Canon’s current entry-level D-SLR, the XTi, and includes several features that raise the bar for the sub-$1,000 D-SLR category.
The 12.2-megapixel camera includes a 3-inch LCD reminiscent of consumer point and shoots, a live view feature previously only available in the much higher-end Mark III series, and improved image quality with a new CMOS sensor.