Vaginal exposure or erosion is an infrequent complication with the current generation of synthetic slings that are made of monofilament polypropylene, have large pores, and are elastic. When synthetic slings are made of materials that do not have the aforementioned physical properties, the erosion rate goes up substantially.
Fortunately, the problem that your wife is experiencing is usually easily corrected.
My wife had this surgery and the mesh wore through the skin. i could feel it during intercourse. she now needs more surgery. they said that only 3% of the people who get this done have those issues.