Thanks for a brilliant site. I decided for the 56€ Oral-B PRO CrossAction 2000 thanks to the information provided here. After using it for a couple of weeks I wanted to write and clarify one thing. It is mentioned on this site that one way of knowing if any model has the recommended 40k pulses/minute is that it would offer 2 speedes. If the 2000 model in fact has 40k pulses/minute it is the exception to this rule, it only has 1 speed "Daily Clean" and a second pulsing on/off speed (Gum Care) which I don't believe counts as a speed by it self. I have not been able to find any written documentation whether it pulses with 20k or 40k and since I only have this model I cannot compare with anything else.
Fauchard was the pioneer of dental prosthesis , and he discovered many methods to replace lost teeth. He suggested that substitutes could be made from carved blocks of ivory or bone . He also introduced dental braces , although they were initially made of gold, he discovered that the teeth position could be corrected as the teeth would follow the pattern of the wires. Waxed linen or silk threads were usually employed to fasten the braces. His contributions to the world of dental science consist primarily of his 1728 publication Le chirurgien dentiste or The Surgeon Dentist. The French text included "basic oral anatomy and function, dental construction, and various operative and restorative techniques, and effectively separated dentistry from the wider category of surgery".