Necklift vs facetite: will the Silouhette Instalift threads I had put in a few months ago cause an issue? (Photo)

From your photos, it appears the best option for you would be a formal neck lift.  This procedure would address the platysma muscle "banding" which is causing your issues, as well as tighten skin laxity. Minimally invasive therapies cannot achieve this goal.  Your threads should not pose an issue, but in office consultation and exam will be needed to accurately determine this.  I suggest consultation with a surgeon specializing in facial cosmetic surgery.  Good Luck!

FaceTite can internally tighten the skin in the lower face and neck. After all the skin has been heated and contracted, we shape the neck with liposuction to give definition and remove stubborn pockets of fat. In one quick treatment, we can tighten skin, remove fat, and contour the lower face, jawline, and jowls with only a weekend of downtime.​ Keep in mind that combination approaches will give you a more significant improvement as opposed to a single procedure. I recommend getting a consultation with a board-certified cosmetic dermatologist and facial sculpting expert. Best, Dr. Emer

A platysmaplasty (neck tuck) is easy to undergo and would make a big improvement. The worthless threads would be of now concern so don't worry.

Depending on the level of laxity, the effects of a neck lift will certainly outlast the effects of non-surgical treatments. The presence of banding down the front of the #neck, and, amount of excess skin and condition of your skin are among some factors which determine if you are a #candidate for #rejuvenating the neck. During an in-person examination, your chin will be evaluated along with the neck and jawline. A weak #chin implies a lack of chin support for the skin along the neck line. In younger individuals a chin implant alone is usually all that is needed to improve the appearance of the neck. Subsequently, it will also improve the overall #balance of the face and can create the illusion of a smaller nose. As a stand-alone procedure, chin augmentation can be performed in the office under local #anesthesia. For individuals with signs of #aging in the neck, a chin implant added to one of the recommended procedures above, will provide optimal results.Your board certified plastic surgeon should evaluate both your anatomical features and aesthetic goals to suggest which procedure best suits your needs. In some cases there may be more than one option to choose from. If you are not a candidate at the time of your #consultation, your board surgeon can recommend non-surgical alternatives to improve your concern.

In my experience, I do not believe having additional work done will be impeded by the threads you have.  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. 

Because FaceTite, by several peer reviewed studies, can tighten the skin by 22-35%, the only incision that you should need is a small one under the chin. Your muscles can be tightened with a platysmaplasty. The InstaLift threads will not pose a problem for a surgeon familiar with surgery after InstaLift. The recovery period is much shorter than a necklift, and results should be comparable

Hello,Thanks for your question. Fortunately, the Silhouette threads usually dissolve over time, which is also why that is not a desirable procedure. However, only a consultation and examination by a board-certified plastic surgeon give give you definitive answers to your questions. Good luck.

Hello and thank you for your question. Based on your photograph and degree of skin laxity, you area a better candidate for a neck lift.  If good technique is used,
this can be done with minimal scarring and can result in a natural look, not
over-done look, with rejuvenation of your face.  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

The Silhouette implants will eventually absorb and should not be a long term problem. These are a temporary solution to the aging neck issue at best. You will probably need a surgical approach to correct the problems you describe. Suspension sutures are rarely the long term answer to your concerns. Best to set up a consultation with a facial plastic surgeon to learn about your options.

I think you would do fine.You have muscles bands that need to be addressed either with plication and/or suspension.your surgeon coulkd doi what he can to remove the remaining threads.