Secondary Waves Defined. Secondary waves, or S-waves, are seismic waves produced by an earthquake. As one side of a fault slips past the other, the pressure that had been stored is released and travels radially away from the focus of the earthquake.
Non-Absorbable sutures include :- Polypropylene sutures, Nylon (poylamide), Polyester, PVDF, silk and stainless steel sutures. Monofilament and Multifilament Sutures. Sutures can also be divided into two types on the basis of material structure i.e. monofilament sutures and multifilament or braided sutures. Braided sutures provide better knot security whereas monofilament sutures provide better passage through tissues.
Sutures, stitches and staples are used for the same purpose-to close wounds or surgical incisions-but they are not the same.For sutures, doctors use a thread or strand of material to perform wound closure.on-absorbable sutures: 1  Prolene sutures: Used in tissue of fascia, muscle or blood vessels. 2  Nylon sutures: Used for closure of skin, surgical incisions or drainage tubes. 3  Silk sutures: Typically used to tie off blood vessels or bowel segments.