Who invented the chair of dentist?

In 1855, surgeon and dentist Italian Giovanni Plateria, after hours of practice and observation, decided abandon the usual position in which he and his colleagues meet their patients-squeezing his head between his knees and the ill-conceived and developed an armchair reclinada, bass, backup reduced, allowing better access to the oral cavity and a convenience of the person who was going to the query.

But for some authors, the chair of Plateria was not the first to settle in 'queries dentists.
In the eighteenth century, the wheels had already removed endorsed a wooden chair in hairdressing, which was placed on each side for one armrest that patients cling to power at the time of extraction.

Later, he added the head-rests and in 1790 Josiah Flagg had the deference of padding.

In 1832, James Snell patented the first chair sit back and 16 years after Waldo Hanchett, Syracuse (USA), introduced as a revolutionary invention a luxury armchair and modernized.