Dent beside tip following rhinoplasty - can this be fixed?

If it's just the dent, a long-acting filler may allow a simple correction with the possibility of scar tissue ingrowth for a semi-permanent correction. On the basal view, it appears that the dent is causing the central nasal column to veer off to the side. So a revision in the nasal tip area would correct both problems. It's always difficult to say whether a revision is going to be easy or hard.

a can be difficult to say whether or not revision work will be simple or complicated.  It should always be assumed that things will be a little complicated and the results of your revision rhinoplasty surgery can usually result in an improvement but it is infrequently perfect.  In any case, the dent that you refer to may be corrected with something as simple as filler or a small localized injection of your own fat.

I might try a filler to that area of indentation first to see if the result/appearance can be improved. If there is an improvement than yearly fillers could be a plan... 

It is difficult to tell from the photo what is going one, and you probably need to be seen in person to be properly evaluated.  Sometimes for minor defects, filler can be an option.