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    Adam's Clasp Fabrication

    Uploaded by

    Shadma Kausar
    The Adams clasp is a type of dental clasp used in removable partial dentures. It consists of three parts: two arrowheads that engage the mesial and distal undercuts of a tooth, a bridge that connects the arrowheads at a 45 degree angle to the long axis of the tooth, and two retentive arms. The clasp is fabricated using 0.7mm round stainless steel wire. It involves making several bends to form the arrowheads and shape the wire to fit the undercuts and contour of the tooth. Key steps include marking the undercut positions, forming the arrowheads at 90 degrees to the bridge, and ensuring proper angulation and fit of the clasp on the tooth.

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    © All Rights Reserved
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    Adam's Clasp Fabrication

    Uploaded by

    Shadma Kausar
    71 views17 pages
    The Adams clasp is a type of dental clasp used in removable partial dentures. It consists of three parts: two arrowheads that engage the mesial and distal undercuts of a tooth, a bridge that connects the arrowheads at a 45 degree angle to the long axis of the tooth, and two retentive arms. The clasp is fabricated using 0.7mm round stainless steel wire. It involves making several bends to form the arrowheads and shape the wire to fit the undercuts and contour of the tooth. Key steps include marking the undercut positions, forming the arrowheads at 90 degrees to the bridge, and ensuring proper angulation and fit of the clasp on the tooth.

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    100009652

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    The Adams clasp is a type of dental clasp used in removable partial dentures. It consists of three parts: two arrowheads that engage the mesial and distal undercuts of a tooth, a bridge that connects the arrowheads at a 45 degree angle to the long axis of the tooth, and two retentive arms. The clasp is fabricated using 0.7mm round stainless steel wire. It involves making several bends to form the arrowheads and shape the wire to fit the undercuts and contour of the tooth. Key steps include marking the undercut positions, forming the arrowheads at 90 degrees to the bridge, and ensuring proper angulation and fit of the clasp on the tooth.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    71 views17 pages

    Adam's Clasp Fabrication

    Uploaded by

    Shadma Kausar
    The Adams clasp is a type of dental clasp used in removable partial dentures. It consists of three parts: two arrowheads that engage the mesial and distal undercuts of a tooth, a bridge that connects the arrowheads at a 45 degree angle to the long axis of the tooth, and two retentive arms. The clasp is fabricated using 0.7mm round stainless steel wire. It involves making several bends to form the arrowheads and shape the wire to fit the undercuts and contour of the tooth. Key steps include marking the undercut positions, forming the arrowheads at 90 degrees to the bridge, and ensuring proper angulation and fit of the clasp on the tooth.

    Copyright:

    © All Rights Reserved
    Download as PDF, TXT or read online from Scribd
    Download as pdf or txt
    of 17

    Adam’s Clasp

    fabrication

    1
    Adams clasp

    . Adams clasp was first decried by Professor Phillip Adams

    It is also known as Liverpool clasp, universal clasp and modified arrowhead


    clasp .
    The clasp is constructed using 0.7mmhard round stainless steel wire .
    Adams clasp is made up of three parts .
    (a) Two arrowheads
    (b) Bridge
    (c) Two retentive arms
    Two arrowheads engage the mesial and the distal proximal undercuts .
    The arrowheads are connected to each other by a bridge the is at degree to the
    long axis of the root .

    fig :- Adams clasp

    2
    3
    Steps in fabrication of Adams clasp

    1- Plier required for constructing appliances :


    Adams pliers, spring forming pliers, mauns cutters

    2- A good quality working model cast in stone is required

    4
    4- Mark position of mesial and distal undercuts.

    5- Prepare undercuts
    These should be prepared to approx. 1mm in depth
    Avoid trimming the buccal surface of tooth.

    5
    6- Straighten a piece of 0.7mm stainless steel
    wire.

    7- Make a 90 degree bend.

    6
    8- Mark the length of the bridge onto the wire
    This should be the distance between the two marks on the model where
    the arrowheads will engage the undercuts.

    9- Make another 90 degree bend.

    7
    10- Check length of bridge against model.

    11- Forming the arrowhead’s first bend


    The length of the arrowhead is determined by crown height of tooth

    8
    12- Forming the arrowhead’s first bend
    The length of the arrowhead is determined by crown height of tooth.

    13- First arrowhead formed


    Both sides of arrowhead should be parallel
    First bend into arrowhead should be 90° to bridge.

    9
    14- Forming second arrowhead.

    15- Arrowheads are angled to follow tooth contours.

    10
    16- Check angles and arrowheads are parallel.

    17- Second bend from the arrowhead


    This bend should be below the height of the bridge
    This is achieved by clasping the arrowhead halfway up the outer side,
    prior to bending

    11
    18- By using the tips of the adams pliers, adjust bend until wire touches
    contact point prior to crossing the occlusion.

    19- Check position of arrowheads and angulations of bridge


    Angle of bridge is 45° to long axis of tooth.

    12
    20- Adaptation of wire across occlusion.

    21- Check position and fit.

    13
    22- Bring wire 2/3 into palate to form tag end.

    23- Uniform spacing of 1mm with a foot at the end of tag.

    14
    24- Distal tagging should lie forward to allow sufficient space for contour
    of acrylic baseplate.

    25- Arrowheads must engage undercuts


    Bridge should be of sufficient length to allow arrowheads to engage
    undercuts
    Bridge should be parallel to occlusal plane

    15
    26- Bridge should lie at approximately 45 degrees to long axis of the
    tooth.

    27- First point of contact out of the arrowhead should be the contact
    point prior to crossing the occlusion.

    16
    28- Overview of crib
    Bridge follows line of arch

    17

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