Without tenting, the electrode penetrates {HEAD ~ mucosal tissue} fully, to obtain {TAIL ~ a desired depth} of penetration 
Without tenting , the electrode penetrates { HEAD ~ mucosal tissue } fully , to obtain { TAIL ~ a desired depth } of penetration
OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH