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

Prosthodontics: Pre-Prosthetic Surgery/Complete Denture Flashcards

(52 cards)

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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

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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

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A

VDR=VDO+ 3mm

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

23
Q

Excessive VDO

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

Insufficient VDO

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A

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

25
Christensen's Phenomenon
Distal space b/w maxillary and mandibular occlusal surfaces when mandible is protruded * posterior open bite
26
Camper's Line
imaginary line from ala of nose to tragus of ear
27
Interpupillary Oline
imaginary line b/w pupils of eyes
28
Complete Denture: Plane of Occlusion
Maxillary wax rim parallel to: * Camper's line * Interpupillary line
29
Complete Dentures: Balanced Occlusion
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
Complete Denture: Lingualized Occlusion
Only maxillary posterior lingual cusps contact mandibujlar posterior teeth * prevent dislodgement
31
Bennet Concepts: Bennett Angle vs Shit vs Movement
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
Factors that Favor Disclusion(seperation) of posterior teeth (NO ECCENTRIC CONTACTS) *Anterior Guidance *Posterior Guidance * Cusp Anatomy * Tooth arrangement *Occlusal plane orientation
Horizontal=protrussive Lateral=excursive
33
Curve of Spee
AP Curve * load on long axis of each tooth More mesial tilted as you move distal
34
Curve of Wilson
Mediolateral Curve-- along posterior cusp tips * Load on long axis of each tooth More lingual tilt as you move distally
35
Support
Resistance to Vertical Seating Forces
36
Support for Upper and Lower arch and form the Denture POV
Upper: * Palate * Alveolar Ridge Lower: * Buccal Shelf (mainly) * Retromolar Pad Denture: * Denture Base
37
Stability
Resistance to horizontal dislodging forces
38
Stability for Upper and Lower arch and form the Denture POV
Upper/Lower: * Ridge Height * Depth of Vestibule Denture: * Denture Flange
39
Retention
Resistance to vertical dislodging forces
40
Retention for Upper and Lower arch and form the Denture POV
Peripheral Seal
41
Adhesion
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
Cohesion
Clinging of Like Molecules * Saliva to Saliva Unfavorable: Thick ropy saliva Favorable: Thin and water saliva=better retention
43
Surface Tension
Combo of adhesion and cohesion forces * maintain film integrity Water molecules are more attracted to each other than surrounding air
44
Overextension
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
Underextension
Denture Flange is too short * No retention
46
What is the best indicator for success of a denture?
Ridge * provides all 3: stability, suppport, retention * Wide braod ridge=Best
47
Heat Cured Acrylic
PInk Acrylic on Dentures 2 components: * PMMA=polymer (powder) * MMA=monomer (liquid)
48
Liquid component of Heat-Cured Acrylic contains
Methyl Methacrylate (MMA): Monomer Hydroquinone: Inhibitor * prevents polymerization of MMA Glycol dimethacrylate: cross-linking agent * Increases Rigidity Dimethyl-p-toluidine: Activator
49
Powder Component of Heat-cured Acrylic contains:
Polymethyl Methacrylate (PMMA): powder Benzoyl Peroxide: Initiator Iron and Cadmium salts or organic dye: Pigment
50
Denture Processing: Problems
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
What are the 2 materials used to make denture teeth?
Acrylic Porcelain
52
Acrylic vs Porcelain Denture Teeth
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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