Aphthous stomatitis of the mouth. The word is derived from the Greek word "aphtha" meaning "eruption" or "ulcer". The lesions of several other oral conditions are sometimes described as aphthae, including Bednar's aphthae (infected, traumatic ulcers on the hard palate in infants), oral candidiasis, and foot-and-mouth disease. When used without qualification, "aphthae" commonly refers to lesions of recurrent aphthous stomatitis. Since the word aphtha is often taken to be synonymous with ulcer, it has been suggested that the term "aphthous ulcer" is redundant, but it remains in common use. Stomatitis is also a non-specific term referring to any inflammatory process in the
The Canon of Medicine He began writing the "Canon" in Gorganj, continued in Rey and completed it in Hamadan in 1025. The result was a "clear and ordered "summa" of all the medical knowledge of Ibn Sīnā's time". It served as a more concise reference in contrast to Galen's twenty volumes of medical corpus. "The Canon of Medicine" is divided into five books: Book 1 is made up of six theses which give a general description of medicine in general, the cosmic elements that make up the cosmos and the human body, the mutual interaction of elements (temperaments), fluids of the body (humours), human