Part3: Can a joker smile EVER be corrected after a facelift?

The use of fat grafting in the submalar space prior to the lift can correct this.  In addition to avoiding a lateral sweep of the SMAS tissues when performing the lift.  

This can  be difficult to correct.  With time it may settle on its own.  In certain cases facial filler can be helpful.   In very specific cases revision surgery could be considered involving revision redoing the facelift and reoriented the vectors of pull.  

Suzanne.   The best way to correct the Joker's Smile is to avoid it, facelift technique does play a role. However if present, fillers like fat or Juvederm can soften it. Regards

Hello and thank you for your question.  The
best advice you can receive is from an in-person consultation.  It really depends on how tight the tension lines are and how recently surgery was performed.  It may be possible to rearrange skin tension lines to improve this.   Make sure you specifically look
at before and after pictures of real patients who have had this surgery
performed by your surgeon and evaluate their results.   The most
important aspect is to find a surgeon you are comfortable with. I recommend
that you seek consultation with a qualified board-certified plastic surgeon who
can evaluate you in person.
Best wishes and good luck.
Richard G. Reish, M.D.
Harvard-trained plastic surgeon

It's possible to correct Joker smiles, but it's best not to get it in the first place since the fix can be difficult.  You have not told us if you have it or you are just worried about having it.  Be sure to discuss your goals and concerns with your board certified plastic surgeon and consider the pros and the cons. Be certain your surgeon is properly certified.  I've attached a link where you can start your search. 

Dear SuzzanConnThank you for your question!  The shape change may be help with fillers or fat grafting to correct for volume loss.  The relaxation of the tension and or the vector of the facelift is more difficult to correct and it may be a function of time, tissue relaxation and reshaping of the face with surgery.With Warm RegardsTrevor M Born MD

 It really depends on what procedures were performed and what the results look like both in a static and dynamic state. A full set of facial photographs in repose and smiling are going to be required to make a determination about whether or not anything can be performed for improvement

Without photos, it's hard to say. Fillers may help but the issue it typically due to the skin being "over-pulled". So sorry that you are experiencing this. Best of luck.

It is in fact difficult to correct as the initial cause is related to an over-pulling of skin in an unnatural vector instead of focusing on the underlying tissue support without "pulling" the skin. It is difficult to recommend other options without some images-non smiling.
It may be possible to reduce some of the appearance with filler or possibly "neo threads".

The upturned and elongate mouth corners can be corrected by a reverse corner of the mouth lift. Non-smiling pictures would be needed to determine of this approach would be successful.