Dentures3 week2

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emm64
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212866
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Dentures3 week2
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2013-04-11 10:44:57
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Dentures3 week2
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Dentures3 week2
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  1. What is the selective pressure technique?
    combo of extension for maximum coverage within tissue tolerance (light pressure or intimate contact with moveable loosely attached tissues in vestibules. Refined w/ minimum of pressure using light body.
  2. Maxillary tray requirements
    • 2-3 mm periphery
    • rounded edges
    • rest of tray 1-2mm
    • 10mm long x 15 mm wide handle stright down from ridge
  3. What area of maxillary is not recorded at rest?
    posterior palatal seal area
  4. How do you adjust tray to posterior palatal seal area?
    • 1. mark middle of vibrating line
    • 2. ID hamular nothch
    • 3. extend 2-3 mm beyond line
  5. tray compound melting temp?
    105
  6. Preferred impression material?
    • free flowing, light body, polysulfide
    • 8-10 minute polymerization time
    • pour within 1 hour
  7. Good impression factors
    • 1. smooth well defined peripheries
    • 2. max extension
    • 3. even pressure
    • 4. initmate tissue contact
  8. How do you record highly mobile hypertrophic tissue with minimum displacement?
    • window tray impression technique
    • usually with pts w/ combination syndrome
    • do not remove because ridge is usually knife edged-> tissues cushion and rarely impinge on interocclusal space
    • window tray technique:
    • 1. outline mobile tissue on cast
    • 2. custom tray has window over mobile area
    • 3. handle middle of palate
    • 4. border mold/polysulfide as usual

    Mobile tissue recorded with Zn Oxide material Krex
  9. What material is used to record highly mobile tissue?
    window tray technique using Zn Oxide (Krex) over mobile tissues
  10. Lab tasks for 3rd clinical appointment
    • 1. box impressions
    • 2. pour master casts in stone
    • 3. trim, index mark master cast
    • 4. make record bases with occlusion rims
  11. Master cast features
    • 1. 4-6mm land
    • 2. 2-3mm depth of peripheral roll
    • 3. base 15-20mm thick
    • 4. trim, mark
    • 5. notch for future remount
  12. What are the primary support areas of mandible? why?
    • buccal shelf: parallel to occlusal plane and dense bone that is relatively resistant to resorption
    • retromolar pad: constant, unchanging, doesn't resorb from denture use.  Contains glandular tissue, lower margin of pterygomandibular raphe, fibers of buccinator, superior constrictor and temporalis tendon
  13. what determines length of lingual flange of mandibular denture?
    • mylohyoid: muscular floor of mouth
    • extending onto retromylohyoid space improves dentrue stability and retention.
  14. House classifications
    • Philosophical: rational, sensible, realistic expectations
    • Exacting: methodical, precise, severe demands (reach understanding before starting)
    • indifferent: apathetic, uninterested, uncooperative, doesn't follow instructions (poor prognosis)
    • hysterical: emotionally unstable, excitable, apprehensive (may requre psychiatric help)
  15. What is the chewing efficiency of dentures compared to complete dentition?
    1/4 to 1/6th
  16. maxillary resorption patterns
    • buccal-labial toward lingual
    • affects stability mostly
  17. denture oral lesions
    • epulis fissuratum: inflammatory fibrous hyperplasia-> surgery, shorten flange
    • inflammatory papillary hyperplasia: usually complicated by candidiasis
  18. Therapy of palatal papillary hyperplasia with candidiasis
    • nystatin powder: undersurface of denture (3-4 weeks)
    • nystatin cream: corners of mouth
    • reline denture
    • remake denture
    • Surgical excision w/ electrosurgery

    • *nystatin rinse ineffective, supposotories or lozenge if extend beyond dentures
    • ** not premalignant
  19. What is the tissue conditioning material?
    • visco-gel
    • 1. shorten borders
    • 2. remove resin from bearing surface
    • 3. mix and apply smooth layer
    • 4. immerse in water bath before reinsertion
    • 5. verify VDO, midline
    • 6. 10 minutes revaluate and trim excess
  20. How are gross occlusal discrepancies adjusted?
    tooth colored resin (acrylic) reestablish CR
  21. What are the factors affecting prognosis?
    • 1. bearing surface anatomy
    • 2. tongue position
    • 3. FOM posture
    • 4. denture history
    • 5. psychosocial classification
  22. denture care
    • leave out for 6-8 hours a day
    • brush gums, tongue, palate 1x day
    • unwaxed floss
    • clean over towel or water to prevent fracture
    • soak 2x week: 2 tsp calgon, 1 tsp bleach, 1 cup H2O
    • soak when not using

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