Is lip threading a good temporary alternative for a lip lift?

I've been considering a lip lift for a long time. I have a thin upper lip, slightly disproportionate from my fuller lower lip, and I have very little teeth show when smiling and none at all when relaxed. When I was at a consultation for this the doctor said my philtrum had average length (tho I always thought it was long). Considering the permanence of a lip lift, is lip threading a good alternative to try at first? Does it increase teeth show and open up the smile? What are the risks?