There are various modes by which the maxillary sinus is infected, among them being diseased teeth, diseases of the ethmoid cells, of the frontal sinuses, of the sphenoidal sinus, syphilitic necroses, etc.
The general impression in both the medical and dental professions is that the maxillary sinus is infected through diseased teeth more than from any other source. Some claim that three-fifths of the diseases of the antrum are brought about in that way. From study of the anatomical relations and from my clinical experience, I conclude this is a mistake. In order to demonstrate this more clearly, it is necessary that the anatomical relations of the maxillary sinus with the teeth and internal structures of the face should be thoroughly understood. The development of the teeth and face, with their great variations, should also be considered.
The development of the sinus begins about the fourth month of gestation by
CRYER MH. MODES OF INFECTION OF THE MAXILLARY SINUS. JAMA. 1900;XXXV(21):1322–1327. doi:10.1001/jama.1900.24620470012001d
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