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    Maxillary Occlusal Rim

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    varsha ammu
    Occlusal rims are wax pillars placed on denture bases that record a patient's jaw relationship and guide the positioning of artificial teeth. They have a flat occlusal surface and are centered over the residual ridge. For maxillary rims, the anterior portion is 20-22mm high while the posterior is 16-18mm high and 8mm wide at the center. Occlusal rims are adjusted to fit the patient's mouth and establish the vertical dimension and occlusal plane.

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    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd

    Maxillary Occlusal Rim

    Uploaded by

    varsha ammu
    73 views19 pages
    Occlusal rims are wax pillars placed on denture bases that record a patient's jaw relationship and guide the positioning of artificial teeth. They have a flat occlusal surface and are centered over the residual ridge. For maxillary rims, the anterior portion is 20-22mm high while the posterior is 16-18mm high and 8mm wide at the center. Occlusal rims are adjusted to fit the patient's mouth and establish the vertical dimension and occlusal plane.

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    Maxillary occlusal rim.pptx

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    Occlusal rims are wax pillars placed on denture bases that record a patient's jaw relationship and guide the positioning of artificial teeth. They have a flat occlusal surface and are centered over the residual ridge. For maxillary rims, the anterior portion is 20-22mm high while the posterior is 16-18mm high and 8mm wide at the center. Occlusal rims are adjusted to fit the patient's mouth and establish the vertical dimension and occlusal plane.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    73 views19 pages

    Maxillary Occlusal Rim

    Uploaded by

    varsha ammu
    Occlusal rims are wax pillars placed on denture bases that record a patient's jaw relationship and guide the positioning of artificial teeth. They have a flat occlusal surface and are centered over the residual ridge. For maxillary rims, the anterior portion is 20-22mm high while the posterior is 16-18mm high and 8mm wide at the center. Occlusal rims are adjusted to fit the patient's mouth and establish the vertical dimension and occlusal plane.

    Copyright:

    © All Rights Reserved
    Download as PPTX, PDF, TXT or read online from Scribd
    Download as pptx, pdf, or txt
    of 19

    MAXILLARY

    OCCLUSAL
    RIM

    Varsha Ammu Varghese


    • Occlusal rims are wax pillars placed on baseplates which can
    be adjusted to record the patients interocclusal jaw
    relationship and serve as guides for setting the teeth in proper
    position and establishing the proper contours of the denture
    base.
    • Consists of wax rims attached to well fitting trail denture
    base
    Occlusal rim defintion
    • Occluding surfaces fabricated on interim or final denture
    bases for the purpose of making maxillomandibular relation
    records and arranging teeth
    • Since the baseplates and occlusal rims are made on the
    master casts without the patient being present, the wax rims
    are adjusted to certain arbitrary dimensions that should
    require a minimum amount of adjustment in patients mouth,
    Requirements

    • The position should be in the anticipated postion of artificial


    teeth
    • It must be securely attached to the base
    • The occlusal surface must be smooth and flat
    • It should be contoured to support the lip and cheeks
    accurately
    • All the surfaces should be smooth
    Purpose

    • Means of transfer of facebow records


    • Aid in
    - orientation of incisors and occlusal plane when properly
    contoured
    - developing contours of the lips and check when properly
    contoured
    - Developing the vertical dimension of occlusion
    • Making tentative centric relation records
    • Serve as a general aid in selection of teeth
    Wax rim characteristics
    • Wax rims are smooth and have a flat occlusal surface.
    • They are about as wide buccolingually as denture teeth-
    wider in the posterior , narrower in the anterior
    • The occlusal rim must be centered buccolingually over and
    parallel to the residual ridge crest
    • Except for the anterior portion of the maxillary occlusal rim
    Iabially oriented.
    Dimensions

    • Maxillary arch
    1.The anterior wax rim height is 20-22mm
    2.The posterior wax height is 16-18mm(from the center of
    ridge the height would be 8mm).
    3.The width of the anterior rim is app 3-5mm
    4.The width of the occlusal rim in the posterior region is
    approximately 8-10mm
    5.The occlusal rim is properly sealed to the baseplate without
    any voids
    6.The posteriors of the occlusal rims are cut at a 30 degree
    angle to the occlusal plane
    Instruments

    • Wax spatula
    • Kingsley scraper
    • Occlusal plane former
    Baseplate wax
    Wax ready-made occlusal rim
    • It is supplied as a horse shoe shaped rim, adapt it in the
    proper position on the record base
    • Softened it slightly, sealed it with the record base by the aid
    of a wax knife
    • Smooth all the surfaces
    Hand made occlusal rim
    • Uniformly soften a sheet a hard pink baseplate wax.
    • Flame the wax in a Bunsen burner flame slowly by passing
    the wax quicly through the flame many times.
    • When the wax is thouroughly softened, fold the wax is used
    • The other way, the wa is simply rolled into a tight cyclinder,
    then shaped to arch form
    • Form the wax into a horseshoe shape and adapt the wax to
    the record base over thecridge crest area
    • Begin at the right tuberosity area and continue to the anterior
    and opposite tuberosity area.
    • Seal it to the record base with wax using a hot spatula
    • Use a pancake turner or a heated wax spatula to develop a
    flat occlusal plane
    • The width and height of the occlusion rim then adjusted
    according to the measurements mentioned before.
    Clinically

    • Maxillary occlusion rim adjustment


    • Heat the occlusal plane former in a flame and carefully form
    the occlusal aspect of the rim.
    • Catch the melted wax in a paper towel
    • Form the buccal and labial contiurs with the hot plate in a
    similar manner.
    • If there voids fill them with wax and repeat the process
    Maxillary wax rim checklist
    • The occlusal portion of the rim should have the following
    thickness
    • -molar region-

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