Hysteresis - Hysteris in orthodontics is related to the Nickel-Titanium wires. It's the difference between temperature on the commencing section of the Niti wire and a finishing stage of the Niti wire. The (hkl) Instructions shown in the Advert IPF of monoclinic martensite are Instructions of normals to lattice planes https://lorenzoxsmev.bloggactivo.com/32187786/orthodontic-wires-an-overview