Materials

Question 1

What properties make NiTi wires a common choice for alignment?

Answer 1

• large range of action
• low stiffness
• light continuous force
• low friction
• non toxic
• poor bio host
• shape memory
• good spring back

Question 2

Define range

Answer 2

• the deflection a wire can achieve

* the point that a wire can still return to its original shape

Question 3

Define formability

Answer 3

• the amount of deformation that can take place before the wire fractures

Question 4

Define stiffness

Answer 4

• the force delivered by a wire

* low stiffness provides the ability to apply lower forces and more consistent forces over time

Question 5

Define friction

Answer 5

• a force that resists the relative motion of two objects in contact
• excess friction can lead to anchorage loss

Question 6

Define annealing

Answer 6

• using heat to change the molecules in the structure of NiTi so the shape memory no longer exists

Question 7

What the the properties of stainless steel wires?

Answer 7

• high stiffness
• good joinability
• poor bio host
• non toxic
• short range of action
• low friction
• higher continuous force
• low deflection
• corrosion resistant
• cheap