Adam's clasp

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Introduction to Orthodontics
Fifth Year

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Adam's clasp

  1. 1. Bridge Arrowhead Arrowhead Construction of Adam’s Clasp Tag
  2. 2. Pliers required for constructing appliances: Adams pliers, spring forming pliers, Mauns cutters. 05-Mar-12 2
  3. 3. A good quality working model cast in stone is required 05-Mar-12 3
  4. 4. Mark mesial and distal undercuts for molar arrowhead placement 05-Mar-12 4
  5. 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 05-Mar-12 5
  6. 6. Straightened piece of wire 05-Mar-12 6
  7. 7. First make a bend in the wire slightly more than a right angle 05-Mar-12 7
  8. 8. Hold the wire to the mesial mark on the tooth 05-Mar-12 8
  9. 9. Mark with a pencil to show second bend point 05-Mar-12 9
  10. 10. Make a second bend slightly more than a right angle 05-Mar-12 10
  11. 11. Hold the wire to the model to see that the dimensions are correct 05-Mar-12 11
  12. 12. Hold in the pliers just below one of the bends 05-Mar-12 12
  13. 13. Proceed with a further right angled bend 05-Mar-12 13
  14. 14. Bend completed 05-Mar-12 14
  15. 15. Right angled bend on the other side to match 05-Mar-12 15
  16. 16. Tilt the wire down 05-Mar-12 16
  17. 17. The wire is locked against the beak before starting to bend the arrowhead 05-Mar-12 17
  18. 18. Bend the arm upwards so it follows the line of the opening of the beaks of the pliers 05-Mar-12 18
  19. 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 05-Mar-12 19
  20. 20. The second arrowhead held in the pliers beak prior to bend 05-Mar-12 20
  21. 21. The pliers turned to show that the first arrowhead is locked against the beak of the pliers 05-Mar-12 21
  22. 22. The wire is now bent upwards parallel to the opening of the beak of the pliers 05-Mar-12 22
  23. 23. The completion of the bend of the second arrowhead 05-Mar-12 23
  24. 24. Showing arrowhead being turned in at 45o to bridge 05-Mar-12 24
  25. 25. Both arrowheads are bent into 45o from the bridge 05-Mar-12 25
  26. 26. Turning the arrowhead to 45o to the bridge 05-Mar-12 26
  27. 27. Checking that the arrowheads fit into marked undercuts of tooth 05-Mar-12 27
  28. 28. Starting to bend the retention arm over the contact point of tooth 05-Mar-12 28
  29. 29. Holding in pliers prior to bend 05-Mar-12 29
  30. 30. Bending arm over beak of pliers 05-Mar-12 30
  31. 31. Straightening out arm 05-Mar-12 31
  32. 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 05-Mar-12 32
  33. 33. Bend wire down from over contact point towards the palate 05-Mar-12 33
  34. 34. Bend the long end of wire up so it doesn't interfere with fit 05-Mar-12 34
  35. 35. The wire being adapted from over contact point into the palate allowing a space of 1mm for acrylic to flow underneath the wire 05-Mar-12 35
  36. 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 05-Mar-12 36
  37. 37. Cut the wire leaving 1mm tag 05-Mar-12 37
  38. 38. The leg is sufficiently off the palate to allow acrylic to flow underneath 05-Mar-12 38
  39. 39. Bending the left side of clasp arm over at 90 degrees with bridge of clasp 05-Mar-12 39
  40. 40. Placing on the model to check adaptation to the contact point 05-Mar-12 40
  41. 41. Adapt retention leg of the clasp into palate 05-Mar-12 41
  42. 42. Final clasp position 05-Mar-12 42
  43. 43. Bridge parallel with buccal cusps 05-Mar-12 43
  44. 44. Bridge halfway up crown 05-Mar-12 44
  45. 45. Thank You 05-Mar-12 45

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