Orthodontics - Adam's clasp Flashcards
1
Q
What wire is used to make an Adam’s clasp?
A
0.7mm HSSW (0.6mm in deciduous dentition)
2
Q
What instruments are required to make an Adam’s clasp?
A
- No 64 pliers
- pencil
- wire cutter
3
Q
What are the stages of making an Adam’s clasp (1st half)?
A
- mark up the undercuts of the cast
- make the arrowheads
- contour arrowheads to tooth at 45 degrees
- hold LHS arrowhead the inside of the bridge
- hold pliers horizontally and bend wire upwards, then turn pliers so that the bridge is horizontal and bend wire upwards
- grasp outer portion of LHS arrowhead and bend wire 45 degrees to create S-bend
- contour wire between teeth, cut and create tag
4
Q
What are the components of stainless steel?
A
- iron
- chromium
- nickel
- titanium
- carbon
5
Q
What is the percentage of iron in stainless steel?
A
72%
6
Q
What is the percentage of chromium in stainless steel?
A
18%
7
Q
What is the percentage of nickel in stainless steel?
A
8%
8
Q
What is the percentage of titanium in stainless steel?
A
1.7%
9
Q
What is the percentage of carbon in stainless steel?
A
0.3%
10
Q
What are the components of an Adam’s claps?
A
- arrowhead
- bridge
- flyover
- leg
- tag
11
Q
What are the stages of making an Adam’s clasp (2nd half)?
A
- grasp RHS arrowhead from the inside of the bridge
- hold pliers horizontal and push wire downwards
- rotate hand so that bridge is horizontal and bend wire upwards
- grasp outer part of RHS arrowhead and bend 45 degrees
- contour between teeth, cut and create tag
12
Q
How do you activate an Adam’s clasp?
A
- begin at acrylic and bend in direction required
- create a “dip bend” 2mm along from acrylic to prevent patient from biting on wire
- adjust arrowheads in towards the bridge to engage undercut
