CLASPSINDIAN DENTAL ACADEMYwww.indiandentalacademy.com       www.indiandentalacademy.com
www.indiandentalacademy.com
DEFINITION • The name clasp is derived from a   French word “UYPTAN” which means   “to embrace”. • Clasps are the retentiv...
There are many types of clasps. 1.’ C ’ clasp 2.Full clasp or Jackson’s clasp 3.Triangular clasp 4.Adam’s clasp and their ...
Retention --”Holding of teeth inideal aesthetic andfunctional positions”                                BY RIEDEL      www...
IDEAL REQUIREMENTS• Unobtrusive.• Not impinge.• Close contact to the  tooth.• Usable in both deciduous  and permanent  den...
• No active force on the anchor  tooth.• Rigid• Easy to fabricate and also replace  if needed.• Not interfere in the growt...
USESTo secure the appliance inpositionTo prevent rolling of appliancesTo resist forces of displacementTo provide retention...
CLASSIFICATIONA.   Hand Made     Machine Made.B.   Single tag arm     Double tag arm       www.indiandentalacademy.com
MODE OF ACTION OF      CLASPSClasp engage onto the undercuts(constricted areas on the teeth.)Two types of undercuts. Bucca...
ANGLE’SLine of occlusionIt is a smooth (catenary)curve passingthrough the central fossa of each uppermolar and across the ...
L                              I                              N                              E                            ...
CIRCUMFERENTIAL     CLASP    www.indiandentalacademy.com
• Circumferential clasp / C-Clasp /  3/4th Clasp.• It uses the bucco-cervical  undercut.• 2nd molars and canines.• Single ...
www.indiandentalacademy.com
Advantages• Good retention.• Easy to fabricate.• Single occlusal crossover wire.• Easy to replace.           www.indianden...
Disadvantages• Not on semi-erupted tooth.• Decalcification of cervical  margin.• Gingival irritation.• Plaque accumulation...
JACKSONS  CLASP  www.indiandentalacademy.com
• V.H. Jackson 1906• Jacksons Clasp / Full Clasp / U  Clasp.• Both bucco-cervical and proximal  undercuts.• 0.7mm to 1mm. ...
www.indiandentalacademy.com
Advantages• Simple design• Adequate retention.      www.indiandentalacademy.com
Disadvantages• Not useful in partially erupted  teeth.• Difficult to adjust.• Not on unfavorably inclined  tooth.         ...
SOUTHEND  CLASP  www.indiandentalacademy.com
• Most common for anterior  anchorage.• Single arrowhead between  Central Incisors with wire  following the gingival margi...
TRIANGULAR   CLASP  www.indiandentalacademy.com
• Also called as MODIFIED  ZIMMER CLASP.• Excellent retention by the single  arrowhead in the interproximal  area.• Free e...
www.indiandentalacademy.com
Advantages• Easy to fabricate.• Excellent retention.• Pre fabricated available.• Elastics can be engaged.             www....
Disadvantages• Not useful if adjacent tooth is  absent.• Used as secondary / additional  retention.             www.indian...
BALL END CLASP  www.indiandentalacademy.com
• Action and location similar to  triangular clasp.• Pre fabricated available. Can be  made by adding solder to end of a  ...
www.indiandentalacademy.com
Advantages• Easy to fabricate.• Single occlusal interference.• Less gingival irritation.• Easy to replace.             www...
Disadvantages• Short arm makes adjustment  difficult.• Cannot be used for primary  retention.• Cannot be used in absence o...
SCHWARZ CLASP www.indiandentalacademy.com
• Also called as ARROWHEAD  CLASP.• A.M. Schwarz 1935.• Mesial and distal undercuts of the  teeth.             www.indiand...
www.indiandentalacademy.com
Advantages• Reliable retention.• Does not interfere in posterior  occlusion.• More length of wire hence more  flexible.• M...
Disadvantages• Difficult to fabricate.• Needs special plier.• Irritates soft tissue.• Tends to separate teeth.• Is bulky h...
CROZAT CLASP www.indiandentalacademy.com
• Crozat in 1920• Along with the u clasp another  curved wire is soldered on the base  (Crescent).• Strong retention is po...
www.indiandentalacademy.com
DUYZING CLASPDUYZING,S J.A.C. –1969 0.7m.m WIRE USED.This clasp is used to engage the buccal undercutsof molars.This clasp...
ADAMSCLASPwww.indiandentalacademy.com
• Adams clasp / modified  arrowhead clasp / liverpool clasp  / universal clasp.• C. PHILIPS ADAMS in May 1950.• Most widel...
PartsBRIDGE2 ARROWHEADS2 TAG ARMS     www.indiandentalacademy.com
BRIDGE• Is 2/3rd the mesio-distal width of  the tooth, or slightly less then the  distance between mesiobuccal  and distob...
Arrowheads• They should lie in the disto and  mesio buccal undercuts.• Shaped according to the curve of  the gum margins i...
Tag arms• Closely fitted to the contact  points, down to the interdental  embrassure.• Space between the tag arms and  pal...
FABRICATION    www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
Advantages•   Small,neat and unobtrusive.•   Any tooth.•   Both deciduous and permanent dentition.•   Even on semi erupted...
Disadvantages• Unwanted palatal tipping if gets activated.• May lead to elongation of tooth if is fitting  tightly.• Can b...
MODIFICATIONSOF ADAMS CLASP    www.indiandentalacademy.com
Anterior Adams• 0.6mm• Also called double clasp.         www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
With distal extension/ traction             hook   • To engage elastics   • Not given if sulcus is shallow.            www...
With eyelet  www.indiandentalacademy.com
With a soldered hook    www.indiandentalacademy.com
With a soldered tube    www.indiandentalacademy.com
With a single arrowhead      www.indiandentalacademy.com
With accessory arrowhead       www.indiandentalacademy.com
Smart claspwww.indiandentalacademy.com
• It is used in magnetic activator  devices• Wire used 0.7mm• Bend 2mm loop on each side along  with arrow head• It can be...
ADVANTAGES• Coils of the smart clasp increases  spring back property.• Reduces frequent tightening.• Can be used with any ...
Delta claspwww.indiandentalacademy.com
TWIN BLOCK• William J. Clark• Used in twin block appliances• Retentive loops were triangular  in shape hence the name “Del...
ADVANTAGES• Design of the closed loop does not  open up with repeated removal.• Less subject to breakage.• Provides excell...
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
www.indiandentalacademy.com
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Removable appliances in orthodontics /certified fixed orthodontic courses by Indian dental academy

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The Indian Dental Academy is the Leader in continuing dental education , training dentists in all aspects of dentistry and offering a wide range of dental certified courses in different formats.

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Removable appliances in orthodontics /certified fixed orthodontic courses by Indian dental academy

  1. 1. CLASPSINDIAN DENTAL ACADEMYwww.indiandentalacademy.com www.indiandentalacademy.com
  2. 2. www.indiandentalacademy.com
  3. 3. DEFINITION • The name clasp is derived from a French word “UYPTAN” which means “to embrace”. • Clasps are the retentive components of the orthodontic appliances.This unit of removable orthodontic appliance holds the appliancein position and is called clasp. www.indiandentalacademy.com
  4. 4. There are many types of clasps. 1.’ C ’ clasp 2.Full clasp or Jackson’s clasp 3.Triangular clasp 4.Adam’s clasp and their modifications 5.Schwarz clasp 6.South end clasp 7.Duyzing clasp 8.Ball end clasp 9.Crozat clasp 10.Delta clasp 11.Eyelet clasp www.indiandentalacademy.com
  5. 5. Retention --”Holding of teeth inideal aesthetic andfunctional positions” BY RIEDEL www.indiandentalacademy.com
  6. 6. IDEAL REQUIREMENTS• Unobtrusive.• Not impinge.• Close contact to the tooth.• Usable in both deciduous and permanent dentition.• Adequate retention. www.indiandentalacademy.com
  7. 7. • No active force on the anchor tooth.• Rigid• Easy to fabricate and also replace if needed.• Not interfere in the growth of jaws and eruption of teeth. www.indiandentalacademy.com
  8. 8. USESTo secure the appliance inpositionTo prevent rolling of appliancesTo resist forces of displacementTo provide retention & anchorageFor engaging elastics www.indiandentalacademy.com
  9. 9. CLASSIFICATIONA. Hand Made Machine Made.B. Single tag arm Double tag arm www.indiandentalacademy.com
  10. 10. MODE OF ACTION OF CLASPSClasp engage onto the undercuts(constricted areas on the teeth.)Two types of undercuts. Buccal / Lingual Cervical undercuts. Mesial / Distal Proximal undercuts. www.indiandentalacademy.com
  11. 11. ANGLE’SLine of occlusionIt is a smooth (catenary)curve passingthrough the central fossa of each uppermolar and across the cingulum of the uppercanine and incisor teeth.The same line runs along the buccal cuspsand incisal edges in the mandibular arch. www.indiandentalacademy.com
  12. 12. L I N E OF O C C L U S I Owww.indiandentalacademy.com N
  13. 13. CIRCUMFERENTIAL CLASP www.indiandentalacademy.com
  14. 14. • Circumferential clasp / C-Clasp / 3/4th Clasp.• It uses the bucco-cervical undercut.• 2nd molars and canines.• Single retention arm.• 1mm wire used in molars. www.indiandentalacademy.com
  15. 15. www.indiandentalacademy.com
  16. 16. Advantages• Good retention.• Easy to fabricate.• Single occlusal crossover wire.• Easy to replace. www.indiandentalacademy.com
  17. 17. Disadvantages• Not on semi-erupted tooth.• Decalcification of cervical margin.• Gingival irritation.• Plaque accumulation enhanced.• Easily distort. www.indiandentalacademy.com
  18. 18. JACKSONS CLASP www.indiandentalacademy.com
  19. 19. • V.H. Jackson 1906• Jacksons Clasp / Full Clasp / U Clasp.• Both bucco-cervical and proximal undercuts.• 0.7mm to 1mm. www.indiandentalacademy.com
  20. 20. www.indiandentalacademy.com
  21. 21. Advantages• Simple design• Adequate retention. www.indiandentalacademy.com
  22. 22. Disadvantages• Not useful in partially erupted teeth.• Difficult to adjust.• Not on unfavorably inclined tooth. www.indiandentalacademy.com
  23. 23. SOUTHEND CLASP www.indiandentalacademy.com
  24. 24. • Most common for anterior anchorage.• Single arrowhead between Central Incisors with wire following the gingival margin..Stephen’s-1979 www.indiandentalacademy.com
  25. 25. TRIANGULAR CLASP www.indiandentalacademy.com
  26. 26. • Also called as MODIFIED ZIMMER CLASP.• Excellent retention by the single arrowhead in the interproximal area.• Free end towards distal to facilitate the engagement of elastics.• 0.7mm wire www.indiandentalacademy.com
  27. 27. www.indiandentalacademy.com
  28. 28. Advantages• Easy to fabricate.• Excellent retention.• Pre fabricated available.• Elastics can be engaged. www.indiandentalacademy.com
  29. 29. Disadvantages• Not useful if adjacent tooth is absent.• Used as secondary / additional retention. www.indiandentalacademy.com
  30. 30. BALL END CLASP www.indiandentalacademy.com
  31. 31. • Action and location similar to triangular clasp.• Pre fabricated available. Can be made by adding solder to end of a wire. www.indiandentalacademy.com
  32. 32. www.indiandentalacademy.com
  33. 33. Advantages• Easy to fabricate.• Single occlusal interference.• Less gingival irritation.• Easy to replace. www.indiandentalacademy.com
  34. 34. Disadvantages• Short arm makes adjustment difficult.• Cannot be used for primary retention.• Cannot be used in absence of adjacent tooth. www.indiandentalacademy.com
  35. 35. SCHWARZ CLASP www.indiandentalacademy.com
  36. 36. • Also called as ARROWHEAD CLASP.• A.M. Schwarz 1935.• Mesial and distal undercuts of the teeth. www.indiandentalacademy.com
  37. 37. www.indiandentalacademy.com
  38. 38. Advantages• Reliable retention.• Does not interfere in posterior occlusion.• More length of wire hence more flexible.• More easy to adjust.• Enhances eruption. www.indiandentalacademy.com
  39. 39. Disadvantages• Difficult to fabricate.• Needs special plier.• Irritates soft tissue.• Tends to separate teeth.• Is bulky hence less patient compliance. www.indiandentalacademy.com
  40. 40. CROZAT CLASP www.indiandentalacademy.com
  41. 41. • Crozat in 1920• Along with the u clasp another curved wire is soldered on the base (Crescent).• Strong retention is possible www.indiandentalacademy.com
  42. 42. www.indiandentalacademy.com
  43. 43. DUYZING CLASPDUYZING,S J.A.C. –1969 0.7m.m WIRE USED.This clasp is used to engage the buccal undercutsof molars.This clasp is constructed in two halves . www.indiandentalacademy.com
  44. 44. ADAMSCLASPwww.indiandentalacademy.com
  45. 45. • Adams clasp / modified arrowhead clasp / liverpool clasp / universal clasp.• C. PHILIPS ADAMS in May 1950.• Most widely used clasp.• Distobuccal and mesiobuccal undercuts.• Does not separate teeth like a arrowhead clasp.• 0.7mm posteriors 0.6mm anteriors. www.indiandentalacademy.com
  46. 46. PartsBRIDGE2 ARROWHEADS2 TAG ARMS www.indiandentalacademy.com
  47. 47. BRIDGE• Is 2/3rd the mesio-distal width of the tooth, or slightly less then the distance between mesiobuccal and distobuccal undercuts, or length should be equal to the intercuspal distance.• Is 1-2mm away from the buccal surface of the tooth.• Is at 45o to the buccal surface of the tooth.• Should be straight. www.indiandentalacademy.com
  48. 48. Arrowheads• They should lie in the disto and mesio buccal undercuts.• Shaped according to the curve of the gum margins into the interdental papilla.• Long enough to keep the bridge at a proper distance.• Should not touch the adjacent teeth www.indiandentalacademy.com
  49. 49. Tag arms• Closely fitted to the contact points, down to the interdental embrassure.• Space between the tag arms and palate for flow of acrylic.• No sharp bends. www.indiandentalacademy.com
  50. 50. FABRICATION www.indiandentalacademy.com
  51. 51. www.indiandentalacademy.com
  52. 52. www.indiandentalacademy.com
  53. 53. www.indiandentalacademy.com
  54. 54. www.indiandentalacademy.com
  55. 55. www.indiandentalacademy.com
  56. 56. Advantages• Small,neat and unobtrusive.• Any tooth.• Both deciduous and permanent dentition.• Even on semi erupted tooth.• No specialized pliers required.• Can be modified as needed.• No. of modifications are available. www.indiandentalacademy.com
  57. 57. Disadvantages• Unwanted palatal tipping if gets activated.• May lead to elongation of tooth if is fitting tightly.• Can be repaired only if fractured through the arrowheads.• Cannot be given on proclined anteriors. www.indiandentalacademy.com
  58. 58. MODIFICATIONSOF ADAMS CLASP www.indiandentalacademy.com
  59. 59. Anterior Adams• 0.6mm• Also called double clasp. www.indiandentalacademy.com
  60. 60. www.indiandentalacademy.com
  61. 61. www.indiandentalacademy.com
  62. 62. www.indiandentalacademy.com
  63. 63. www.indiandentalacademy.com
  64. 64. With distal extension/ traction hook • To engage elastics • Not given if sulcus is shallow. www.indiandentalacademy.com
  65. 65. With eyelet www.indiandentalacademy.com
  66. 66. With a soldered hook www.indiandentalacademy.com
  67. 67. With a soldered tube www.indiandentalacademy.com
  68. 68. With a single arrowhead www.indiandentalacademy.com
  69. 69. With accessory arrowhead www.indiandentalacademy.com
  70. 70. Smart claspwww.indiandentalacademy.com
  71. 71. • It is used in magnetic activator devices• Wire used 0.7mm• Bend 2mm loop on each side along with arrow head• It can be modified to double clasp on premolars and molars for extraoral traction www.indiandentalacademy.com
  72. 72. ADVANTAGES• Coils of the smart clasp increases spring back property.• Reduces frequent tightening.• Can be used with any type of removable appliances like bite blocks, palatal expanders. www.indiandentalacademy.com
  73. 73. Delta claspwww.indiandentalacademy.com
  74. 74. TWIN BLOCK• William J. Clark• Used in twin block appliances• Retentive loops were triangular in shape hence the name “Delta”• Retains the basic elements of Adams clasp like retentive loops and a buccal bridge www.indiandentalacademy.com
  75. 75. ADVANTAGES• Design of the closed loop does not open up with repeated removal.• Less subject to breakage.• Provides excellent retention on lower premolars.• Suitable for use on most posterior teeth. www.indiandentalacademy.com
  76. 76. www.indiandentalacademy.com
  77. 77. www.indiandentalacademy.com
  78. 78. www.indiandentalacademy.com
  79. 79. www.indiandentalacademy.com
  80. 80. www.indiandentalacademy.com
  81. 81. www.indiandentalacademy.com
  82. 82. www.indiandentalacademy.com

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