Microscopic Examination of Oral Sinus Tracts and Their Associated Periapical Lesions.

摘要

Microscopic examination of 30 sinus tracts revealed that 100% were lined with epithelium at the surface mucosal interface. Twenty of thirty (67%) sinus tracts did not have epithelium deeper than the surface mucosal rete ridges. The remaining extension of the sinus tract was lined with granulomatous tissue. Ten of thirty (33%) sinus tracts had epithelium extending down the tract to the periapical lesion. The periapical inflammatory lesions that the sinus tracts communicated with were microscopically diagnosed as abscesses, granulomas and cysts.