“The essential etiological condition in each disease is uncleanliness at the particular locations where the lesions originate and advance. Without these conditions of uncleanliness no disease occurs.“
“These diseases are caused by microscopic organisms, the lesions at first are microscopic in extent, they advance microscopically, the tissues involved are composed of microscopic elements and the destructive process is mainly microchemical. Therefore all preventive measures must be based upon the fundamental facts which can be known only through microscopic research.”
“The essential cause of the two principal diseases affecting the teeth - caries and periodontoclasia - is uncleanliness at the locations where the lesions originate and advance.”
"A Clean Tooth Does Not Decay, nor does periodontoclasia occur about a clean tooth." C. C. Bass, M.D.