You can use any shape you want some more and more even though there are some parallel shaped fiber posts there are more and more tapered fiber post available on the market and this is basically. You can use anything you like and this is my things that Susser the byline and in current dentistry is to be minimally invasive others don't remove any to structure that you don't have to and is a set of by contrast when you use a tapered post regardless of microstructure composition you're likely to have to remove more to structure than using a tapered post which is right. And that you through this tapered root canal is tapered what sense does it make to use a parallel post and you know what armpits it's interesting that our Indo files are tapered to go. Purchase tapered the paper points are tapered and we start collecting these zero square peg in a round hole sometimes so if the only other thing that that I all say about metal. Post is a sometimes received x-rays were the parallel metal post is two or three times the width of the gutter purchase up at the up at the tip meaning there was a heck of a lot more. Done remove the needed so possibly predisposing it again to failure some sort mail the other part of that what you're saying is in and this is one of things it for my conversations with many endodontist. Over many years when they do referral work it it bothers them that they do their best to be special is to be very meticulous remove only diseased tissue sending back to the generalist.