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BOARDs > Prosthodontics: Pre-Prosthetic Surgery/Complete Denture > Flashcards

Prosthodontics: Pre-Prosthetic Surgery/Complete Denture Flashcards

1
Q

Frenectomy

A

Complete removal of Freenum

High Freenum Attachment
* neart top of alveolar ridge

Most to least common:
Labial>Buccal>Lingual

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2
Q

Free Gingival Graft

A

widen band of keratinized tissue
* Below gingival margin

Requires revascularization from recipient bed

Graft=palate
*includes surface epithelium
* ideal thickness: 1-1.5 mm

Might Need for overdenture teeth

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3
Q

Hypermobile Ridge

A

Flabby edentulous ridges in anterior maxilla

Tx: tissue conditioner if inflamed
* electrosurgery or laser surgery if not effective, can also eliminate the vestibule

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4
Q

What treatment should be done if a hypermobile ridge is inflamed?

A

Tx=Tissue Conditioner
* Electrosurgery or laser surgery if not effective

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5
Q

What do you need to do if your taking an impression w/a hypermobile ridge?

A

Large relief in a tray
OR
perforate custom tray

to avoid displacing the ridge

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6
Q

Epulis Fissuratum

A

Hyperplastic tissue reaction
* due to ill fitting denture or overextended flange

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7
Q

Epulis Fissuratum Treatment

A

Tissue Conditioner & Adjust Flange

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8
Q

Fibrous Tuberosity

A

aka Pendulous Tuberosity

Large Tuberosities touch retromolar pads
* limits interarch space

Tx: Surgical excision

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9
Q

Papillary Hyperplasia

A

Multiple papillary projections on palate
* Etiology: Candidiasis

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10
Q

What causes Papillary Hyperplasia?

A

due to:
* local irritation
* ill-fitting denture
* poor oral hygiene
* leaving dentures in all the time

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11
Q

When can you leave retained root tips?

A

Can be left if:
* intact lamina dura
* no radiolucency

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12
Q

What is the etiology of Papillary Hyperplasia?

A

Candidiasis

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13
Q

Papillary Hyperplasia: Treatment

A

Tx: OHI, leave dentures out at night, soak in 1% bleach and rinse thoroughly

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14
Q

Combination Therapy:
* General
* Signs/Symptoms

A

Only have mandibular anterior teeth
* bone resorption in maxillary anterior

Signs/Symptoms:
* overgrowth of tuberosities (Fibrous tuberosities)
* Papillary hyperplasia in hard palate
* Extrusion of lower anterior teeth
* Bone loss under partial denture bases

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15
Q

Retained Root Tips

A

Residual RT (Non-RCT)-infection risk

Can be left if:
* intact lamina dura
* no radiolucency

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16
Q

Paget’s Disease

A

Etiology: Unknown

Dentures not fitting
* need to remake periodically

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17
Q

Alveoplasty

A

Surgical reshaping of alveolar bone
* sharp, spiny, or irregular ridges

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18
Q

Tori removal indications

A

Creates an undercut (lingual torus)
interferes w/posterior palatal seal (palatal torus)

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19
Q

Bone Augmentation

A

Horizontal>Vertical
* easier to restore horizontal ridge width vs height

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20
Q

VDR

A

Vertical Dimension of Rest

Distance b/w nose and chin at rest
* elevator and depresssor musccles are in equilibrium (PRP=Physiological rest position)

3mm of space b/w upper and lower premolars

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21
Q

VDO

A

Vertical Dimension of Occlusion

Distance b/w nose and chin when biting together
* =superior-inferior relationship b/w maxilla and mandible in MI

22
Q

Interocclusal Space

A

VDR=VDO+ 3mm

the difference b/w VDR and VDO
* ideally 2-4 mm

23
Q

Excessive VDO

A
  • Fatigue of Muscles of Mastication
  • Lips appear strained
  • Gagging
24
Q

Insufficient VDO

A

**Aged appearance-lower 1/3 of face
Angular Cheilitis

25
Q

Christensen’s Phenomenon

A

Distal space b/w maxillary and mandibular occlusal surfaces when mandible is protruded
* posterior open bite

26
Q

Camper’s Line

A

imaginary line from ala of nose to tragus of ear

27
Q

Interpupillary Oline

A

imaginary line b/w pupils of eyes

28
Q

Complete Denture: Plane of Occlusion

A

Maxillary wax rim parallel to:
* Camper’s line
* Interpupillary line

29
Q

Complete Dentures: Balanced Occlusion

A

Simultaneous anterior and bilateral posterior contnacts in centric and eccentric movements
* aka Tripodization
* avoid anterior guidance to prevent dislodgement

On balancing side
* maxillary lingual cusps –>lingual incline of mandibular buccal cusps

On working side:
* maxillary lingual cusps –> facial incline of mandibular lingual cusps
* Mandibular Buccal cusps contact lingual incline of maxillary B Cusps

30
Q

Complete Denture: Lingualized Occlusion

A

Only maxillary posterior lingual cusps contact mandibujlar posterior teeth
* prevent dislodgement

31
Q

Bennet Concepts: Bennett Angle vs Shit vs Movement

A

Bennett Angle:
* nonworking side condyle angle: From anteriorly and medial to sagittal plane
* 15 degrees

Bennett Shift:
* Lateral movement of mandible towards working side during lateral excursions

Bennet Movement:
* lateral movement of both condyles towards working side
* TMJ Looseness

32
Q

Factors that Favor Disclusion(seperation) of posterior teeth (NO ECCENTRIC CONTACTS)
*Anterior Guidance
*Posterior Guidance
* Cusp Anatomy
* Tooth arrangement
*Occlusal plane orientation

A

Horizontal=protrussive
Lateral=excursive

33
Q

Curve of Spee

A

AP Curve
* load on long axis of each tooth

More mesial tilted as you move distal

34
Q

Curve of Wilson

A

Mediolateral Curve– along posterior cusp tips
* Load on long axis of each tooth

More lingual tilt as you move distally

35
Q

Support

A

Resistance to Vertical Seating Forces

36
Q

Support for Upper and Lower arch and form the Denture POV

A

Upper:
* Palate
* Alveolar Ridge

Lower:
* Buccal Shelf (mainly)
* Retromolar Pad

Denture:
* Denture Base

37
Q

Stability

A

Resistance to horizontal dislodging forces

38
Q

Stability for Upper and Lower arch and form the Denture POV

A

Upper/Lower:
* Ridge Height
* Depth of Vestibule

Denture:
* Denture Flange

39
Q

Retention

A

Resistance to vertical dislodging forces

40
Q

Retention for Upper and Lower arch and form the Denture POV

A

Peripheral Seal

41
Q

Adhesion

A

Attraction of Unlike Molecules

saliva to tissues, saliva to denture base
* best seal created by intimate contact of denture base to tissues

Occlusal Prematurities break retention

42
Q

Cohesion

A

Clinging of Like Molecules
* Saliva to Saliva

Unfavorable: Thick ropy saliva
Favorable: Thin and water saliva=better retention

43
Q

Surface Tension

A

Combo of adhesion and cohesion forces
* maintain film integrity

Water molecules are more attracted to each other than surrounding air

44
Q

Overextension

A

Denture Flange is too long
* get sore spot or ulcer after wearing for a while
* Tx: Relieve denture and re-eval in a few weeks
* trim the denture basck where it impinges on tissue

Denture extends too far back (Posterior)
* denture teeth are set so far back-go up onto ramus
* occlusal forces dislodge denture

45
Q

Underextension

A

Denture Flange is too short
* No retention

46
Q

What is the best indicator for success of a denture?

A

Ridge
* provides all 3: stability, suppport, retention
* Wide braod ridge=Best

47
Q

Heat Cured Acrylic

A

PInk Acrylic on Dentures

2 components:
* PMMA=polymer (powder)
* MMA=monomer (liquid)

48
Q

Liquid component of Heat-Cured Acrylic contains

A

Methyl Methacrylate (MMA): Monomer

Hydroquinone: Inhibitor
* prevents polymerization of MMA

Glycol dimethacrylate: cross-linking agent
* Increases Rigidity

Dimethyl-p-toluidine: Activator

49
Q

Powder Component of Heat-cured Acrylic contains:

A

Polymethyl Methacrylate (PMMA): powder
Benzoyl Peroxide: Initiator
Iron and Cadmium salts or organic dye: Pigment

50
Q

Denture Processing: Problems

A

Always shrink
* more shrinkage if excess monomer
* Ideal monomer to polymer ratio: 1:3

Porosity
* due to underpacking with resin at processing or heated to quickly

51
Q

What are the 2 materials used to make denture teeth?

A

Acrylic
Porcelain

52
Q

Acrylic vs Porcelain Denture Teeth

A

Acrylic:
* Better retention: bond to acrylic resin of denture base (Better Bonding)

Porcelain:
more esthetic
* more stain and wear resistant

Brittle

wear opposing teeth

Mechanical retention
* Anteriors=Pins
* Posteriors=diatorics

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