Figure 3.

A, Specimen of the surgical berth associated with the use of microelectrodes and radiofrequency in the coagulation mode (H&E, 40×). The epithelium exhibits a coagulation artefact (white arrow), necrosis, dehiscence, and pyknotic nuclei (empty arrow); sub epithelial haemorrhage is also apparent. B, Specimen of the surgical berth associated with the use of microelectrodes and radiofrequency in the cutting mode (H&E, 20×). The black arrow indicates the area of incision; the epithelium is preserved. The gray arrows indicate the deep margin corresponding to the cut zone. The white arrows indicate a small area with mild stromal damage. The change in coloration and thickening of the collagen bands covers less than one-third of the field.