Will my Nose Job Permanently Affect my Smile?

Hi MT,
It sounds like the muscles of your upper lip were freed up from the connections to the tip of your nose. This is the most common reason for the upper lip to hang down a little more than usual over your upper teeth, and also affect your smile following rhinoplasty.
We often times perform this maneuver during a Rhinoplasty when elevating the tip. By detaching the muscles, the tip of the nose is not pulled downward during the initial recovery period.
Fortunately, the effect on your smile should be temporary as the muscles reattach, and the normal function returns. In my patients it usually takes two to three weeks for the smile to return to normal. You should speak with your surgeon to find out exactly why your smile is different, and when you can expect it to return to normal.
Enjoy your new nose, and hopefully your old smile very soon. Be well.
Dr. P

When we use a columellar strut to enhance tip support, and help maintain tip position, the bottom of the strut is implanted down to the bone above your upper central teeth. The upper lip muscle may be spread to make a pocket, and temporary upper lip heaviness with smiling may occur. This is typically self-limited. Hope this helps.Dr Joseph

It is not unusual for someone's smile to be temporarily affected after rhionplasty because of swelling in the central portion of the lip.  This is especially true if attachments of muscles to the septum and tip were disrupted.  This will typically improve over the course of the first few weeks as the majority of the swelling abates.