if it is the middle of your ski then i would honestly pull them up about 2in each way bend them up and remove extra ptex hanging on (to get the epoxy under and over them)
and once you get them down i would also throw some smoothed over the top of the teeth and have that act as the base.
this is basically what i did but it is a bit defrent because mine were seperated about 6 in and where on the nose