Lip Lift Causes Chin to Look Longer?

Dear Mr./Ms. Secondaryrhino:
I see you have another question regarding your maxillary teeth show. Your concern about the chin is perfectly understandable.
To answer this question there are two things to consider:
Is your chin too long to begin with?
What kind of facial proportions you like?
Your best answer is to get cephalometrics done. This will give you an answer as to your actual facial proportions as measured against a population average.
After you have that information, you then have to decide how it fits your particular ideal. Computer imaging would help with this.

Certainly any change on one part of the face or body can affect the proportions in relation to adjacent anatomic structures.
A smaller nose causes the chin to look bigger.
Bigger breast implants make the waist appear smaller.
Generally the risks of vertical shortening of the chin involves significantly more surgery and risks than a lip lift. If this is your desire express your concerns to the plastic surgeon