Examination of topographical gingival anatomy by a filter imprint technique.

The Millipore filter imprint technique was applied to oral cytology using modification of the Papanicolaou and Shorr stains. This technique has the major advantage of demonstrating on each imprint the topographic relationship between cellular zones and also allows for repeated sampling of superficial changes in the same area without tissue. This method provides a wide variety of cytological information about gingival anatomy and demonstrates a number of regions of differing cellular composition.