CLASPS
www.indiandentalacademy.co
m
INDIAN DENTAL ACADEMY
Leader in continuing dental education
www.indiandentalacademy.com

www.indiandentalacademy.co
m
• The name clasp is derived from a
French word “UYPTAN” which means
“to embrace”. Clasps are the
retentive components of t...
•RETENTION :- is the
means whereby the
displacement of an
appliance is resisted.

www.indiandentalacademy.co
m
IDEAL REQUIREMENTS
 Unobtrusive.
 Not impinge.
 Close contact to the tooth.
 Usable in both deciduous
and permanent de...
 No active force on the anchor tooth.
 Rigid
 Easy to fabricate and also replace if
needed.
 Not interfere in the grow...
USES
• To secure the appliance in position
• To prevent rolling of appliances
• To resist forces of displacement
• To prov...
CLASSIFICATION
A.

Hand Made
Machine Made.

B.

Single tag arm
Double tag arm
www.indiandentalacademy.co
m
MODE OF ACTION
• Clasp engage onto the undercuts
(constricted areas on the teeth.)
• Two types of undercuts.
– Buccal / Li...
CIRCUMFERENTIAL
CLASP

www.indiandentalacademy.co
m
• Circumferential clasp / C-Clasp / 3/4th
Clasp.
• It uses the bucco-cervical undercut.
• 2nd molars and canines.
• Single...
www.indiandentalacademy.co
m
Advantages
• Good retention.
• Easy to fabricate.
• Single occlusal crossover wire.
• Easy to replace.

www.indiandentalac...
Disadvantages
• Not on semi-erupted tooth.
• Decalcification of cervical margin.
• Gingival irritation.
• Plaque accumulat...
JACKSONS
CLASP
www.indiandentalacademy.co
m
• V.H. Jackson 1906
• Jacksons Clasp / Full Clasp / U Clasp.
• Both bucco-cervical and proximal
undercuts.
• 0.7mm to 1mm....
www.indiandentalacademy.co
m
Advantages
• Simple design
• Adequate retention.

www.indiandentalacademy.co
m
Disadvantages
• Not useful in partially erupted teeth.
• Difficult to adjust.
• Not on unfavourably inclined tooth.

www.i...
SOUTHEND
CLASP
www.indiandentalacademy.co
m
• Most common for anterior
anchorage.
• Single arrowhead between Central
Incisors with wire following the
gingival margin....
www.indiandentalacademy.co
m
Advantages
• Unobtrusive.
• Good retention.
• Even be used if Incisors are
proclined.

www.indiandentalacademy.co
m
TRIANGULAR
CLASP

www.indiandentalacademy.co
m
• Also called as MODIFIED
ZIMMER CLASP.
• Excellent retention by the single
arrowhead in the interproximal
area.
• Free en...
www.indiandentalacademy.co
m
Advantages
• Easy to fabricate.
• Excellent retention.
• Pre fabricated available.
• Elastics can be engaged.

www.indiand...
Disadvantages
• Not useful if adjacent tooth is
absent.
• Used as secondary / additional
retention.

www.indiandentalacade...
BALL END
CLASP
www.indiandentalacademy.co
m
• Action and location similar to
triangular clasp.
• Pre fabricated available. Can be
made by adding solder to end of a
wi...
www.indiandentalacademy.co
m
Advantages
• Easy to fabricate.
• Single occlusal interference.
• Less gingival irritation.
• Easy to replace.

www.indian...
Disadvantages
• Short arm makes adjustment
difficult.
• Cannot be used for primary
retention.
• Cannot be used in absence ...
SCHWARZ
CLASP
www.indiandentalacademy.co
m
• Also called as ARROWHEAD CLASP.
• A.M. Schwarz 1935.
• Mesial and distal undercuts of the
teeth.

www.indiandentalacadem...
www.indiandentalacademy.co
m
Advantages
• Reliable retention.
• Does not interfere in posterior
occlusion.
• More length of wire hence more
flexible.
•...
Disadvantages
• Difficult to fabricate.
• Needs special plier.
• Irritates soft tissue.
• Tends to separate teeth.
• Is bu...
CROZAT
CLASP
www.indiandentalacademy.co
m
• Crozat in 1920
• Along with the u clasp another
curved wire is soldered on the base
(Crescent).
• Strong retention is po...
www.indiandentalacademy.co
m
ADAMS
CLASP
www.indiandentalacademy.co
m
• 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.co
m
BRIDGE
• Is 2/3rd the mesio-distal width of the
tooth, or slightly less then the
distance between mesiobuccal and
distobuc...
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
pala...
FABRICATION

www.indiandentalacademy.co
m
www.indiandentalacademy.co
m
Advantages
•
•
•
•
•
•
•

Small,neat and unobtrusive.
Any tooth.
Both deciduous and permanent dentition.
Even on semi erup...
Disadvantages
• Unwanted palatal tipping if gets activated.
• May lead to elongation of tooth if is fitting
tightly.
• Can...
MODIFICATIONS

www.indiandentalacademy.co
m
Anterior Adams
• 0.6mm
• Also called double clasp.

www.indiandentalacademy.co
m
With distal extension/ traction
hook
• To engage elastics
• Not given if sulcus is shallow.

www.indiandentalacademy.co
m
With eyelet

www.indiandentalacademy.co
m
With a soldered hook

www.indiandentalacademy.co
m
With a soldered tube

www.indiandentalacademy.co
m
With a single arrowhead

www.indiandentalacademy.co
m
With accessory arrowhead

www.indiandentalacademy.co
m
Smart clasp

www.indiandentalacademy.co
m
• It is used in magnetic activator
devices
• Wire used 0.7mm
• Bend 2mm loop on each side along
with arrow head
• It can b...
ADVANTAGES
• Coils of the smart clasp increases
spring back property.
• Reduces frequent tightening.
• Can be used with an...
Delta clasp

www.indiandentalacademy.co
m
• William J. Clark
• Used in twin block appliances
• Retentive loops were triangular in
shape hence the name “Delta”
• Ret...
ADVANTAGES
• Design of the closed loop does not
open up with repeated removal.
• Less subject to breakage.
• Provides exce...
Thank you
www.indiandentalacademy.com
Leader in continuing dental education

www.indiandentalacademy.com
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Clasps /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.

Indian dental academy provides dental crown & Bridge,rotary endodontics,fixed orthodontics,
Dental implants courses.for details pls visit www.indiandentalacademy.com ,or call
0091-9248678078

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Clasps /certified fixed orthodontic courses by Indian dental academy

  1. 1. CLASPS www.indiandentalacademy.co m
  2. 2. INDIAN DENTAL ACADEMY Leader in continuing dental education www.indiandentalacademy.com www.indiandentalacademy.co m
  3. 3. • The name clasp is derived from a French word “UYPTAN” which means “to embrace”. Clasps are the retentive components of the orthodontic appliances. www.indiandentalacademy.co m
  4. 4. •RETENTION :- is the means whereby the displacement of an appliance is resisted. www.indiandentalacademy.co m
  5. 5. IDEAL REQUIREMENTS  Unobtrusive.  Not impinge.  Close contact to the tooth.  Usable in both deciduous and permanent dentition.  Adequate retention. www.indiandentalacademy.co m
  6. 6.  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.co m
  7. 7. USES • To secure the appliance in position • To prevent rolling of appliances • To resist forces of displacement • To provide retention & anchorage • For engaging elastics www.indiandentalacademy.co m
  8. 8. CLASSIFICATION A. Hand Made Machine Made. B. Single tag arm Double tag arm www.indiandentalacademy.co m
  9. 9. MODE OF ACTION • Clasp engage onto the undercuts (constricted areas on the teeth.) • Two types of undercuts. – Buccal / Lingual Cervical undercuts. – Mesial / Distal Proximal undercuts. www.indiandentalacademy.co m
  10. 10. CIRCUMFERENTIAL CLASP www.indiandentalacademy.co m
  11. 11. • 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.co m
  12. 12. www.indiandentalacademy.co m
  13. 13. Advantages • Good retention. • Easy to fabricate. • Single occlusal crossover wire. • Easy to replace. www.indiandentalacademy.co m
  14. 14. Disadvantages • Not on semi-erupted tooth. • Decalcification of cervical margin. • Gingival irritation. • Plaque accumulation enhanced. • Easily distort. www.indiandentalacademy.co m
  15. 15. JACKSONS CLASP www.indiandentalacademy.co m
  16. 16. • V.H. Jackson 1906 • Jacksons Clasp / Full Clasp / U Clasp. • Both bucco-cervical and proximal undercuts. • 0.7mm to 1mm. www.indiandentalacademy.co m
  17. 17. www.indiandentalacademy.co m
  18. 18. Advantages • Simple design • Adequate retention. www.indiandentalacademy.co m
  19. 19. Disadvantages • Not useful in partially erupted teeth. • Difficult to adjust. • Not on unfavourably inclined tooth. www.indiandentalacademy.co m
  20. 20. SOUTHEND CLASP www.indiandentalacademy.co m
  21. 21. • Most common for anterior anchorage. • Single arrowhead between Central Incisors with wire following the gingival margin. www.indiandentalacademy.co m
  22. 22. www.indiandentalacademy.co m
  23. 23. Advantages • Unobtrusive. • Good retention. • Even be used if Incisors are proclined. www.indiandentalacademy.co m
  24. 24. TRIANGULAR CLASP www.indiandentalacademy.co m
  25. 25. • 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.co m
  26. 26. www.indiandentalacademy.co m
  27. 27. Advantages • Easy to fabricate. • Excellent retention. • Pre fabricated available. • Elastics can be engaged. www.indiandentalacademy.co m
  28. 28. Disadvantages • Not useful if adjacent tooth is absent. • Used as secondary / additional retention. www.indiandentalacademy.co m
  29. 29. BALL END CLASP www.indiandentalacademy.co m
  30. 30. • Action and location similar to triangular clasp. • Pre fabricated available. Can be made by adding solder to end of a wire. www.indiandentalacademy.co m
  31. 31. www.indiandentalacademy.co m
  32. 32. Advantages • Easy to fabricate. • Single occlusal interference. • Less gingival irritation. • Easy to replace. www.indiandentalacademy.co m
  33. 33. Disadvantages • Short arm makes adjustment difficult. • Cannot be used for primary retention. • Cannot be used in absence of adjacent tooth. www.indiandentalacademy.co m
  34. 34. SCHWARZ CLASP www.indiandentalacademy.co m
  35. 35. • Also called as ARROWHEAD CLASP. • A.M. Schwarz 1935. • Mesial and distal undercuts of the teeth. www.indiandentalacademy.co m
  36. 36. www.indiandentalacademy.co m
  37. 37. Advantages • Reliable retention. • Does not interfere in posterior occlusion. • More length of wire hence more flexible. • More easy to adjust. • Enhances eruption. www.indiandentalacademy.co m
  38. 38. Disadvantages • Difficult to fabricate. • Needs special plier. • Irritates soft tissue. • Tends to separate teeth. • Is bulky hence less patient compliance. www.indiandentalacademy.co m
  39. 39. CROZAT CLASP www.indiandentalacademy.co m
  40. 40. • Crozat in 1920 • Along with the u clasp another curved wire is soldered on the base (Crescent). • Strong retention is possible www.indiandentalacademy.co m
  41. 41. www.indiandentalacademy.co m
  42. 42. ADAMS CLASP www.indiandentalacademy.co m
  43. 43. • 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.co m
  44. 44. Parts BRIDGE 2 ARROWHEADS 2 TAG ARMS www.indiandentalacademy.co m
  45. 45. 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.co m
  46. 46. 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.co m
  47. 47. 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.co m
  48. 48. FABRICATION www.indiandentalacademy.co m
  49. 49. www.indiandentalacademy.co m
  50. 50. 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.co m
  51. 51. 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.co m
  52. 52. MODIFICATIONS www.indiandentalacademy.co m
  53. 53. Anterior Adams • 0.6mm • Also called double clasp. www.indiandentalacademy.co m
  54. 54. With distal extension/ traction hook • To engage elastics • Not given if sulcus is shallow. www.indiandentalacademy.co m
  55. 55. With eyelet www.indiandentalacademy.co m
  56. 56. With a soldered hook www.indiandentalacademy.co m
  57. 57. With a soldered tube www.indiandentalacademy.co m
  58. 58. With a single arrowhead www.indiandentalacademy.co m
  59. 59. With accessory arrowhead www.indiandentalacademy.co m
  60. 60. Smart clasp www.indiandentalacademy.co m
  61. 61. • 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.co m
  62. 62. 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.co m
  63. 63. Delta clasp www.indiandentalacademy.co m
  64. 64. • 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.co m
  65. 65. 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.co m
  66. 66. Thank you www.indiandentalacademy.com Leader in continuing dental education www.indiandentalacademy.com

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