We use non-absorbable (sometimes referred to as non-dissolvable) suture stitches for our modification procedures.
Absorbable (dissolvable) sutures are generally reserved for internal procedures where it would be difficult to remove the stitches after healing. While having dissolvable stitches sounds like the easier option rather than requiring a follow-up appointment to remove them, they are more likely to cause issues during healing and where possible, should be avoided.
Sometimes they can break down too soon resulting in worse scarring from the wound re-opening and other times not break down at all. It is far better to be able to remove the stitches exactly when needed, especially in easily accessible areas.