Lab 4 Bends Flashcards
17x25 TMA is usually satisfactory, but if there are any torque changes to be made in the wire, it is best to use a?
19X25 TMA in a 0.022 slot
- In-out bends
- Buccolingual/labiolingual
- Rotational movement
First order bends
- Tip bends
- Mesiodistal movements
Second order bends
Torque
Third order bends
Horizontal change relative to line of occlusion.
1st order bends
Affect expansion or contraction (e.g., use it to correct crossbite)
1st order bends
Help in derotation.
1st order bends
First order bend in between premolar and molar is known as?
Anti-rotation or Toe-in bend
First order bends are? (4)
- Lateral inset
- Canine eminence
- Molar offset
- Antirotation bends
First order special plier?
Hammerhead pliers (step pliers)
Used to make bends in various “step heights” (1mm, .75mm, .5mm, .25mm)
Hammerhead pliers
If step pliers are used, steps can be quickly, efficiently, and easily bent on ______ wires.
NiTi
Bends in the occluso-gingival direction to maintain the final angulation of teeth.
2nd order bends
Represents vertical change.
2nd order bends
- In incisal area, they provide ideal angulation of teeth.
- In posterior area, they maintain distal tipping and cause bite opening.
2nd order bends
Used in:
- paralleling roots adjacent to extraction spaces
- setting up posterior anchorage
- artistically positioning of teeth
2nd order bends
3 types of second order bends?
- tip back bends
- V bends
- artistic positioning bends
An upward and downward bend, used for preparing anchorage in posterior segment.
Tip back bends
Tip back bends are usually placed between, which tooth #?
5-6 & 6-7
Tip back bends should be at least?
20 degrees
Used to obtain axial changes in the bucco-lingual / labio-lingual root and crown axis.
3rd order bends
Involves twisting of wires.
3rd order bends
What are the 2 types of torque?
1) Bucco-lingual root torque
2) Bucco-lingual crown torque
These are usually used in pairs to give individual labial or lingual torque to make 3rd order bends.
Rose torquing pliers
