Introduction to Orthodontics Fifth Year

1. Bridge
Arrowhead
Arrowhead
Construction of Adam’s Clasp
Tag

2. Pliers required for constructing appliances:
Adams pliers, spring forming pliers, Mauns
cutters.
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3. A good quality working model cast
in stone is required
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4. Mark mesial and distal undercuts
for molar arrowhead placement
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5. The position of the Adams Clasp tags
drawn on the model to ensure they
don't interfere with screws and
springs which may be required
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6. Straightened piece of wire
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7. First make a bend in the wire
slightly more than a right angle
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8. Hold the wire to the mesial mark on the tooth
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9. Mark with a pencil to show second bend point
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10. Make a second bend slightly more than
a right angle
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11. Hold the wire to the model
to see that the dimensions are correct
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12. Hold in the pliers just below one of the bends
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13. Proceed with a further right angled bend
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14. Bend completed
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15. Right angled bend on the other side to match
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16. Tilt the wire down
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17. The wire is locked against the beak
before starting to bend the arrowhead
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18. Bend the arm upwards so it follows
the line of the opening of the beaks of the pliers
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19. Turn the pliers round, then the wire is pulled back
on itself forming the 'U' type of loop
at the bottom of the arrowhead
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20. The second arrowhead held
in the pliers beak prior to bend
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21. The pliers turned to show that
the first arrowhead is locked
against the beak of the pliers
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22. The wire is now bent upwards parallel
to the opening of the beak of the pliers
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23. The completion of the bend
of the second arrowhead
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24. Showing arrowhead being turned in
at 45o to bridge
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25. Both arrowheads are bent into 45o from the bridge
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26. Turning the arrowhead to 45o to the bridge
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27. Checking that the arrowheads
fit into marked undercuts of tooth
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28. Starting to bend the retention arm
over the contact point of tooth
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29. Holding in pliers prior to bend
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30. Bending arm over beak of pliers
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31. Straightening out arm
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32. Put clasp back to model making sure
the arrowheads
go into the marked undercuts
and then check the wire goes over
the contact point between the two teeth
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33. Bend wire down from over
contact point towards the palate
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34. Bend the long end of wire up
so it doesn't interfere with fit
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35. The wire being adapted from over contact point
into the palate allowing a space of 1mm
for acrylic to flow underneath the wire
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36. Holding the leg of the clasp, bend a right angle
towards the palate, This is designed to keep
the leg of the clasp off the palate
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37. Cut the wire leaving 1mm tag
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38. The leg is sufficiently off the palate
to allow acrylic to flow underneath
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39. Bending the left side of clasp arm
over at 90 degrees with bridge of clasp
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40. Placing on the model to check
adaptation to the contact point
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41. Adapt retention leg of the clasp into palate
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42. Final clasp position
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43. Bridge parallel with buccal cusps
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44. Bridge halfway up crown
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45. Thank You
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