Clasps are the retentive components of the removable appliances.

Mode of action-

  • Clasps act by engaging certain areas of teeth called the undercuts.
  • Two types of undercuts are found in natural dentition
  • Buccal and lingual cervical
  • Mesial and distal proximal
  • Adams clasp engages the mesial and distal proximal undercuts.

Adams clasp also called as universal clasp, liverpool clasp and modified arrowhead clasp.

Parts of adams clasp-

  • Two arrowheads
  • Bridge
  • Two retentive arms

Advantages of adams clasp-

  • Rigid and offers excellent retention
  • Fabricated on deciduous and permanent dentition
  • Can be fabricated on fully or partially erupted tooth
  • Can be used on molars, premolars and incisors.
  • Small and occupies minimum space
  • Can be modified in many ways.
  • Universal pliers can be used for fabricating.

Modifications of adams clasp-

  • Adams with single arrowhead
  • Adams with J hook
  • Adams with incorporated helix
  • Adams with additional arrowhead
  • Adams on incisor and premolars
  • Adams with distal extension

Reference- Bhalajhi 7th edition

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