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