Can using filler after a rhinoplasty have permanent results?

I had rhinoplasty and my profile is slightly sloped rather than straight. My surgeon says he wants to use a very small amount (0.1 ml) or so filler to straighten the area between the dorsal hump and the supratip but he says that this will only need to be done once or twice max as the collagen grows around the filler and it's not like having a total non - surgical rhinoplasty which is only temporary. Is there any truth to this and can i expect lasting results? I'm 1 month Post op fyi.