If you really wants to have a wider sight on the subject you may realize that the topic deserves more than the current simplification : " sugar / fluoride" and the theory based mainly on the Acidogenic etiology.
If you dare I suggest you to read the almost unknown masterwork of Dr Ralph Steinman and the endocrinologist, Dr John Leonora published in 1970, that examines the role of dentinal fluid flows in the teeth of rats.
The pdf attached is a paper writing to explain the concept of caries as introduction to a cariology course, of course you must read Fejerskov and Kidd, Dental Caries, chapter one: Defining the disease.