Removeable Pros Flashcards

1
Q

Give denture hygiene / cleaning instructions

A
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2
Q

What are the Kennedy classifications?

A

Class 1 - bilateral free end saddle

Class 2 - unilateral free end saddle

Class 3 - bounded saddle

Class 4 - bounded saddle crossing midline

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3
Q

What are the craddock classifications?

A

tooth borne support - hard tissue is resistance bearing

Mucosa supported

Tooth and mucosa supported

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4
Q

What is the RPI system?

A

Rest - mesial occlusal rest

Proximal plate - adjacent to saddle - 2-3mm guide surface with an undercut to allow for natural movement of the tooth

I bar clasp - gingival approaching engaging greatest prominence

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5
Q

Clearances needed for lingual bar?

A

3mm to gingiva

4mm to for the bar thickness and then 1mm from FOM

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6
Q

What lines are needed on the jaw registration?

What reference lines are used and where?

A

Midline

Canine lines

Smile line

Ala-tragus line - used for aligning the occlusal plane

Interpupillary line - ensure flat occlusal plane with the eyes

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7
Q

What errors may there be on a CoCr denture on a cast? / what to look for and check on these?

A

Fault with the metal framework
- incorrect design
- incorrect patient
- error when casting resulting in bubbles and rough surface caused by air bubbles in wax burn out
- error in design - too much gingival margin coverage, undercuts not blocked out etc

Faults with prescription
- needs more rests / support
- requires more clasps / clasps not engaging undercuts
- sublingual bar instead of a lingual bar etc - check the connector

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8
Q

What to write on lab card for primary imps

A

Please pour casts in 50/50 stone (or improved stone for CoCr)

  • construct special trays in light cure PMMA with extra oral handle and finger rests, non perforated and 2mm spacer.
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9
Q

What undercut is needed for a CoCr clasp?

A

0.25mm

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10
Q

What is a denture reline? How is it done and what are the limitations?

A

Denture reline is where there is a replacement of the fitting surface of the denture

Done by taking imp in light body PVS with current denture and then alginate over the denture

Limitation
- increases thickness of denture as incorporates new impression material - so use light body PVS

Good for mandibular dentures but not maxillary as makes them heavier

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11
Q

What is a denture rebase?

How is it done?

A

Replacement of entire denture base

Undercuts removed from the denture first with an acrylic trimmer
- wash impression with closed mouth technique
- imp of denture in mouth with alginate

The lab will then make an overplaster and deal with the rest!

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12
Q

How take a flabby ridge imp?

A

Primary imp in alginate then ask for a special tray with a window over flabby ridge
- take first imp in mucocompressive material such as ZoE

Then remove any debris from window

  • Reinsert imp with a light / medium body PVS over the window to take a mucostatic impression
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13
Q

Common types of denture fracture?

A

Midline
Tooth lost from base
Flange broken
Acrylic saddle detach from CoCr base
Clasp fracture or bent

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14
Q

How repair a simple fracture e.g. midline or denture in 3 big pieces

A
  • if they can be located, just send to lab after disinfection. They will pour cast and use acrylic to fix denture
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15
Q

How repair denture where piece missing e.g. flange broken off?

A

Take impression of the denture in the mouth
- disinfect and send to lab

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