Is a Giampapa suture a good idea?

That technique can be very effective in the right situation.  I have seen many of these suspension sutures hold their tension for a decade or more.  When properly used it can be a very valuable tool.  Good luck.

A good anterior platysma repair buttressed by suturing the posterior platysma should be enough. I have abandoned the Giampappa Suture because when pulled too tight or placed incorrectly nerve compression and pain behind ear can occur.

This suture is a suspension suture from behind one ear to the other in order to support the healing of the central platysma in its proper position. I don't think it works well by itself but can be helpful to support suturing of the medial borders of the platsyma muscles.