ABGD - Fixed Pros Board Review Flashcards Preview

Fixed Pros - ABGD Oral Boards > ABGD - Fixed Pros Board Review > Flashcards

Flashcards in ABGD - Fixed Pros Board Review Deck (216)
Loading flashcards...
1

If you have a Distal Extension, what are 3 tx options to consider?

  1. Removable Dental Prosthesis
  2. Implant Retained FDP
  3. Removable Partial Overdenture
  • Retained roots
  • Implant assited RDP

2

What are 5 Disadvantages of RBDFP?

  1. Not "non-invasive"
  2. Anterior esthetics difficult
  3. Limited indications: Occlusion, restorative space
  4. Limited long-term data
  5. Debonding problems

3

The ratio of the occlusocervical/incisocervical dimension of a prepared tooth to the faciolingual dimension should be at least _____ or higher for all teeth

0.4 mm

4

For removable, what would you consider for an abutment if the crown-root ratio is less than 1:1?

Consider overdenture abutment

5

What happens when you have a B contact only?

Maxillary teeth move lingually, mandibular teeth move buccally

6

What are 4 advantages of Cusp to Fossa Occlusion?

  1. Forces in line with the long axis of teeth
  2. Eliminates the "plunger cusp" effect
  3. Greater stability to the dental arch
  4. Less tendency towards tooth mobility

7

Describe the Double String Retraction Technique...

  • A small water or Hemodent dampened cord / 2.0 silk or 000 is placed
  • A second Hemodent dampened cord is placed
  • Only the second cord is removed during impression making

8

What are some characteristics of Cement Retained Implant Crowns?

  • Not retrievable
  • Better screw mechanics
  • Better esthetics
  • Easier to develop occlusion
  • Correct implant malposition
  • More passive fit

9

Regarding alginate properties, what is the best way to control the setting time?

Water Temp

not water : powder ratio

10

What happens when you remove alginate from an undercut?

It gets compressed

11

What is a Metamerism?

Seemlingly same color but appear different under a different light source

 

12

In CR, what position is the condyle braced in?

Superior and Anterior position

13

What do you have to be careful of when using Electrosurgical methods of tissue management?

Pacemaker!

14

What is the optimum crown-root ratio for implants? Minimal?

  • Optimum 2:3
  • Minimal 1:1
  • Landmarks: Occlusal Surface to Available Bone Height

15

Regarding the first principle of prep design according to Shilingburg, how do you preserve Periodontal structures?

  • Margin location
  • Attached gingiva
  • Biologic width
  • Periodontal surgical timing

16

What is value?

Lightness or darkness of the hue

17

What 2 things increase with time regarding alginate?

  1. Tear strength
  2. Resistance to deformation

18

What should be used routinely when mandibular molars are prepped for an FDP? 

Where do you place these?

Axial Grooves/Boxes

Proximal Surface (B/L)

19

In what order regarding value, chroma, and hue should you pick your shade match?

Value > Chroma > Hue

20

What are 2 advantges of RBFDP?

  • Less invasive to tooth and pulp
  • Reduced cost

21

Define Imbibition...

When alginate abosrbs water (swells) on immersion

22

What are some clinical tips when pouring/transfering an alginate impression to the lab?

  • Pour as soon as possible
  • Store in 100% humidity (plastic bag) until pouring
  • Don't wrap in wet towels or immerse

23

In an Implant Retained Fixed Complete Denture (Hybrid), how many implants would you use, and between what structures?

4-6 Implants

Between mental foramina

24

When you are programming a semi-adjustable articulator, what are you setting?

What records do you use to accomplish this?

Condylar inclination + Bennett angle

Eccentric interocclusal records (lateral/protrusive records) are ued to program this

25

What makes internal hex better than external hex?

  • Developed to provide solutions to screw loosening
  • Increased surface contact abutment-implant
  • Geometric lock
  • Better stress distribution

26

What happens when you have an A and C contact only?

Maxillary teeth move buccally, mandibular teeth move lingually

27

What kind of records does a Celenza Class 3b take? 

What is an example?

  • Accepts lateral records or protrusive records
  • Whipmix
  • Can be Arcon or Non-Arcon

28

What are 4 techniques you can record CR clinically?

  1. Chin Point Guidance
  2. Bimanual Manipulation
  3. Leaf Gauge
  4. Lucia Jig

29

What are 2 material considerations for RBFDP?

  1. Base metal allows: Sand Blasted
  2. High noble alloys: Tin Plating

30

Can a Hanau Articulator except lateral bite registrations?

No!

31

For the facebow record, what is traditionally the anatomic reference?

What are they for the Whip-Mix and the Hanau?

Transverse horizontal axis

32

What does a smooth/rough prep have to do with adhesive cements?

  • The effect of preparation roughness has not been definitely determined for adhesive cements
  • A resonable smooth preparation is therefore recommended

33

What are these prep designs getting ready for?

FBFDP

34

What type of records dos a Celenza Class 4a take?

Condylar paths are made by engravings made by patient

Functionally Generated Path...

35

What are some examples of Bis-Acryl provisional materials?

  • Integrity
  • Protemp
  • Radica

36

What is the recommended axial wall heigh for incisors and premolars?

What is the recomended total occlusal convergence?

 

3.0 mm 

10 - 20 °

37

How many points does each cusp contact on the opposing tooth?

3

38

When tx planning a distal extension, what is the tx of choice if the distal abutment is compromised?

  • Implant Retained FDP
  • Must have sufficient bone
  • Know patient's occlusion
  • Evaluate restorative space
  • 1.5 - 2 mm between implant and tooth
  • 3 mm between implants

39

What wasn't good about External Hex...

  • 10-56% Loosening (Gold cylinder and screw)
  • Better screw designs today
  • Higher preloads

40

What are 4 chemicals that are NOT to be used in tissue management?

  1. Epinephrine
  2. Ferric Subsulfate (Monsel's solution)
  3. Zinc Chloride
  4. Negatol (creosol sulfonic acid and formaldehyde)

41

In Cusp/Fossa Occlusion, what provides Mesial/Distal Stability?

Closer stoppers and equilizers

42

Define Syneresis...

Gel filaments contract and squeeze out water

43

When tooth conditions and estehtics permit, finish lines should be located...

Supragingivally

Subgingival margins increase potential for periodonatl problems...

44

What are the 2 purposes of Closure Stoppers (Mesiodistal Stability)?

  • STOPS CLOSURE OF MANDIBLE as it relates to the maxilla
  • NEUTRALIZES forces exerted by equalizers

45

For an FDP, an endodontically treated tooth is ____ more likely to fail...

2x

46

What it is the minimum space required for a screw-retained implant crown?

  • Implant top to occlusal surface: 6 - 7 mm

47

Can you name the first 4 uses of a Diagnostic Mounting?

  1. Simulation of mandibular movement
  2. Analysis of occlusal plane
  3. Critical analysis of occlusion and disocclusion
  4. Visualization of anatomy and restorations

48

What are the 4 principles of preparation according to Shilingburg?

  1. Preservation of Tooth (& Tissues) Structure
  2. Retention and Resistance
  3. Structural Durability
  4. Marginal Integrity

49

What does an Articulator imitate?

Physiologic motion by substituting mechanical equivalents for anatomical parts

50

For implants, what is the required mesiodistal space?

  • "Rule of 7"
  • Mesial to Distal

 

51

What can happen minerals in the tap water do to setting algiante?

Accelerates it

52

What do you need to keep in mind when treatment planning a Cantilever?

  • Lengthy root and favorable configuration
  • Long clinical crown for good retention/resistance form
  • Good crown:root ratio
  • Healthy periodontium

53

When programing an articulator, would you use lateral AND protrusive records?

  • Lateral OR protrusive records
  • Protrusive record more shallow
  • Can also use (match up) wear facets to program articulator

54

What are 2 Articulation Philosophies?

  • Panky-Mann -Schuyler
  • Gnathology

55

What happens when you leave the cast too long attached to alginate?

Degrades cast surface

56

What is Centric Occlusion?

OCCLUSION of opposing teeth with mandible IN CENTRIC RELATION may or may not coincide with MIP

57

Define Latero-Retrusion...

Lateral and backward movement of the condyle on the working side

58

Define Retention?

That which prevents removal of a restoration along its path of placement or long axis of the tooth preparation

59

Is there such thing as a perfect articulator?

No!

60

How do you choose the right articulator?

  • Based on:
  1. Complexity of the restoration
  2. Complexity of mandibular movement
  3. Complexity of occlusal scheme
  • Choose the articulator that fits the job

61

When programming the articualtor, which record is "Safer" to use...

Protrusive Record

62

What 5 factors contribute to RDP success?

  1. Proper survey & design
  2. Adequate abutments
  3. Broad Stress Distribution
  4. Well adapted bases
  5. Altered Cast Impression

63

What are 5 methods for tissue managment?

  1. Mechanical methods
  2. Rotary gingival currettage
  3. Mechanicocheical methods
  4. Electrosurgical
  5. Diode Laser

64

What is Hemodent?

Aluminum Chloride

65

Is connecting implants to natural teeth a good idea?

  • All methods report intrusion of natural teeth
  • Consensus: this restoration type should be avoided
  • Recommendations: use two implants in edentuous space

66

What is Astringident?

Ferric Sulfate

67

What is an example of a Celenza's Class 2 Articulator?

Galetti

Allows some vertical and horizontal

68

What types of records does a Celenza Class 4b take?

Condylar paths can be angled, or customized. 

Usually acceps a pantograph (3 dimensional dynamic registration or tracings)

69

What is anterior guidance?

70

What is the equation for the Law of Beams?

Flex is related to cube of pontic length

71

Can you name 6 uses of Diagnostic Casts?

  1. Diagnosis and treatment planning
  2. Diagnostic waxing
  3. Provisional matrix fabrication
  4. Survey and design
  5. Radiographic guides and surgical templates
  6. Design and fabricate custom trays

72

If the length of the edentulous space is short/medium, what are you thinking?

  • Short: Implants/Fixed
  • Medium: Implants/Fixed

73

What are some considerations regarding shade selection?

  • Surface texture
  • Background: lip stick, make-up
  • Reflective qualities: Translucency, opacity, craze lines
  • Metamerism
  • Light Source: 5500K

74

What is an ear-bow?

  • An arbitrary facebow 
  • Based on an average anatomic distance between external auditory meatus and the transverse horitzontal axis of the mandible

75

What is an Articulator?

A mechanical instrument that represents the (1) temporomandibular joints and(2) jaws, to which (3)maxillary and mandibular casts may be attached to SIMULATE SOME OR ALL MANDIBULAR MOVEMENTS

76

Why would you not want to use Zinc chloride in managing soft tissue?

Causes tissue damage

77

What occlusal scheme is this?

 

  • Mutually Protected Articulation
  • Posterior teeth prevent excessive anterior contacts in MIP
  • Anterior teeth disengage posterior teeth in all eccentric movements
  • This can only happen if CO = MIP, not completely true if MIP does not = CO

78

What are 3 treatment options for Complete Edentulism?

  1. Conventional Complete Dentures
  2. Overdentures
  3. Fixed-Detachable (Hybrid)

79

What records do you use to mount the mandibular cast?

Centric relation interocclusal records

80

Crown-Root Ratio is a consderation for what 3 treatment choices?

  1. Fixed
  2. Removable
  3. Implants

81

Without anterior guidance in a case, it is difficult to avoid what?

What may be indicated?

Eccentric Interferences

High adjustable articulator may be indicated

82

Why would you not want to use Ferric Subsulfate (Monsel's solution) for tissue management?

Causes tissue damage

83

What is this picture illustrating? 

What occlusal scheme are they aiming for?

Functionally Generated Path

Group Function

84

What are 5 features of successful Cast Post and Cores?

  1. Adequate Legnth and Strength of Post
  2. Adequate Apical Seal
  3. Anti-Rotation Feature
  4. Vertical Stop
  5. FERRULE (Very difficult to achieve)

85

How many mm do you want for implant emergence profile?

  • 3 mm
  • Gingival bulk
  • Hide implant and abutment connection
  • Room for metal/porcelain labial to screw channel

86

What technique do you want to use when removing alginate?

Snap removal of tray

87

What are some notable properties of PEMA?

  • Lower polymerization temp
  • Lower shrinkage
  • Preferred for direct technique
  • Not as durable or color stable

88

What are 3 indications for a Non-Rigid Connector?

  1. Mesially inclined abutment (> 24 degrees, Tylman) (< 30 degrees, Shilingburg)
  2. Divergent abutments
  3. Pier Abutments

89

What are 4 indications for placing a margin subgingivally?

  1. Caries
  2. Inherited Subgingival Margin
  3. Short Clinical Crown
  4. Esthetics (anterior)
  5. Root sensitivity? (According to Preston)

90

How does condylar inclination effect design of occlusal morphology?

  • Steeper the inclination, steeper the cusps MAY be (created)

91

How many pounds of force are generated from an RDP, FDP, and Natural Teeth?

  • RDP: 26 lb
  • FDP: 54.5 lb
  • Natural Teeth: 150 lb

92

Describe the soft tissue contact in an Implant Retained Fixed Complete Denture (Hybrid)...

No soft tissue contact of minimal tissue contact

93

Are Celenza Classes 4a and 4b Semi or Fully adjustable articulators?

Fully Adjustable

94

What are 4 objectives of Ideal Occlusion/Equilibration?

  1. Develop occlusion that reduces horizontal forces
  2. Provide for maximum intercuspation of the teeth with the condyles in centric relation
  3. Condition the neuromuscular system - occlusal device
  4. Replace adaptive arc of closrue with "skeletal" arc of closure
  5. Do not alter OVD when equilibrating
  6. Provide for comfortable anterior disclusive angle

95

What are 4 special considerations for an FDP from #7-10?

  1. Arch Curvature
  2. Cantilever Length
  3. Residual Ridge (Pontic Site Development)
  4. Canine Stability

96

What must happen from a periodontal standoint before considering Fixed/Removable/Implants?

  • Must control disease
  • Implants are shown to be successful in patients whose periodontal disease has been controlled

97

Define Latero-Protrusion...

A protrusvie movement of the mandibular condyle in which there is a lateral component

98

What are some indications for a Resin Bonded Fixed Dental Prosthesis?

  • Man/max incisor or single posterior replacement
  • Non-restored/minimally restored abutments
  • Periodontal splint/"buy time"
  • Large pulp chambers
  • Unhealed ridges
  • Orthodontic retainer
  • Pre-implant for adolescent

99

Surface roughness on a crown prep generally increases retention with what type of cement?

Zinc phosphate

100

Describe the Pankey Mann Schuyler Treatment Goals...

  • MIP = CO
  • Protrusive balance with posteriors
  • GROUP FUNCTION on working side (functionally generated path)
  • No non-working (balancing) contacts
  • Allows for LONG CENTRIC slide 0.1 - 0.5 mm (Freedom in Centric)

* The above statements are historical in nature and are not being taught by the Pankey Institute today

101

What occlusal scheme is this?

  • Group Function Articulation
  • Simultaneous contacts of several teeth acts as a group to distribute occlusal forces

102

In order to program the articulator you add ___________ and ___________

Condylar Inclination + Bennet Angle

Used to program the condylar elements of the articulator

 

103

What % of patients exhibit surtrusion or retrusion that the articulator cannot accept?

20%

104

If you have a high caries index and oral hygiene limitations, what is the only option?

Removable

105

What are some characteristics of a Screw Retained Implant Crown?

  • Retrievable
  • Hole in occlusal surface
  • Demand precise implant placement
  • Very difficult positioning in anterior
  • Poor esthetics if access in esthetic zone

106

Define CR...

The maxillo-mandibuular relationsip in which the condyles articulate with the thinnest avascular portion of their respecive disks with the complex in the anterior-superior position against the slopes of the articular eminencies. This position is INDEPENDENT of tooth contact.

107

How do you decrease tearing of alginate?

Increase rate of removal

108

For FDP's what is the % likelihood of an abutment needing endodontic treatment?

3-23%

109

What are some design principles of a RBFDP?

  • Utilize Guide Planes/Proximal Grooves
  • Maximize Bonding Area
  • Resistance Form (Proximal Wrap/Grooves)
  • Occlusal/Cingulum Rest
  • Supragingival Margins
  • Occlusal Clearance

110

How do you use rotary gingival currettage in regards to tissue management?

Use of rotary diamonds to enlarge the sulcus

111

What is a Face-bow transfer record used for?

Mount maxillary cast

112

What is hue?

Name of the color

113

What are some notable properties of Bisacryl (bis-GMA)?

  • Low polymerization temp
  • Low shrinkage
  • Can be repaired/added
  • Brittleness
  • for single units

114

What is this picture illustrating?

Custom 3rd point of Reference

115

Can you name the last 4 uses of a Diagnositc Mounting?

5. Abutment length and angulation

6. Diagnostic Preparations

7. Analysis of available restorative space

8. Analysis of edentulous areas

116

What is an example of a PEMA provional material?

SNAP

117

What are 3 applications to utilize a Functionally Generated Path?

  1. Complete Dentures
  2. Complete Denture over natural teeth
  3. Fixed Pros: Group Function

118

What are some imporant cementation principles when cementing a RBFDP?

  • Moisture control
  • Pumice teeth
  • Etch enamel
  • Appropriate luting agent
  • Re-etch framework after try-in

119

What are the 2 primary determinants of retention?

  1. Total Occlusal Convergence (Taper)
  2. Prep height

120

How are mechanicochemical methods used to manage tissue?

Use of retraction cords containing various chemicals

121

Describe the "A" contact...

Shearing cusps of maxillary teeth occlude with stamp cusps of mandibular teeth (buccal cusps)

122

What is the limiting factor in not allows a crown to seat when discussing bevels?

The film thickness of cement limits closure of marginal gap

123

What are the locations of Equalizers?

  • Mesial incline of maxillary posterior teeth
  • Distal inclines of mandibualr posterior teeth
  • Should be more on slope of elevations, but can be on the summit

124

Is Ante's Law hard and fast or a guideline?

Guideline Only...

125

If the Edentulous Span is long, what are you thinking?

Removable

126

For removable, what is the optimum crown-root ratio? what is the minimum?

  • Optimum 2:3
  • Minimal 1:1

127

Define Articulation...

The STATIC AND DYNAMIC CONTACT RELATIONSHIP between the occlusal/incisal surfaces of the teeth during function

128

What are 5 requirements for a successful Diagnostic Mounting?

  1. Accurate diagnostic casts
  2. Semi-adjustable articulator
  3. Face-bow transfer record
  4. Centric relation interocclusal records
  5. Program articulator

129

What are 3 examples of Minimal Contact pontics?

  1. Modified Saddle
  2. Modified Ridge Lap
  3. Conica, bullet, spheroidal

130

Define Latero-Surtrusion...

Lateral and upward movement of the condyle on the working side

131

What are some benefits of splinting together an Implant Retained FDP?

  • Eases Fabrication
  • Stronger System
  • Must achieve passive fit

132

What is chroma?

Intensity/strength of the hue

133

For required restorative space, what is the minimum space required for soft tissue ridge to occlusal surface?

What about implant top to occlusal surface?

  • Soft tissue ridge to occlusal surface: 5.0 to 6.0 mm
  • Implant top to occlusal surface: 7.0 to 9.0

 

134

What 3 things degrade casts?

  1. Saliva
  2. Blood
  3. Syneresis 

135

Total Occlusal Convegence should be between _____ and _____

  • As low as 10° for anterior teeth
  • As high as 22° on molars

136

What are 5 keys to implant success?

  1. Bone quality/quantity
  2. Implant position
  3. Adequate space
  4. Controlled occlusal forces
  5. Accurate prosthesis fit

137

In overdentures, how much bone loss occurs in a year?

0.4 mm/year in mandible

4x greater in mandible

138

Regarding A, B, and C contacts, what combination provides stability?

  • A + B contacts = stability
  • C + B contacts = stability
  • A + B + C contact = stability

139

If you have a high water : poweder ratio, how does this affect the strength of alginate?

Decreases strength

140

When you have extensive bone loss in the anterior, what is the risk when placing implants?

Esthetics may be compromised

141

What are 3 benefits of tx planning RDP, what is one big negative?

  • Minimal tooth preparation/recontouring
  • Correct large ridge defects
  • Proven cost effective treatment
  • Endodontically treated abutments 4X more likely to fail!

142

In Cusp/Fossa Occlusion, what provides Buccal/lingual stability?

A, B, & C contacts

143

To minimize error in Face-bow records, what can you do?

  • Avoid arc of rotation errors
  • Avoid excessively thick interocclusal records
  • Make closed interocclusal reocrds whenever possible

144

What are some notable properties of PMMA?

  • Best physical properties
  • High polymerization temp
  • High volumetric change
  • Monomer irritating to pulp and gingiva

145

What are 3 possible solution for a Tipped Molar Abutment when trying to plan for an FDP?

  1. Ortho/Uprighting
  2. Mesial 1/2 Crown Retainer
  3. Non-Rigid Connector

146

How do you verify your mounting?

  1. Multiple records stable and condyles seated (2 of 3)
  • Classic method
  • Intraoral verification of closure in dentate patient
  1. First point of contact intraorally matches first point of contact on articulated casts
  2. Articulated casts slide into maximum intercuspation from CR contact
  3. Other methods: Vericheck, split cast mounting

147

When tx planning a Distal Extension, what is the most conventional treatment?

RDP

Especially if implants are not indicated

148

Why use CR?

  • Avoid eccentric interferences
  • Decreased trauma from occlusion (wear, cusp fractures)
  • Class 3 lever: anterior disocclusion in front of muscles leads to less force generated
  • Stability of occlusion
  • Interruption of potentially destructive forces in the joint
  • Repeatable position

149

Why would you not want to use Epinephrine for chemical tissue management?

  • Potential for systemic side effects
  • A 1 inch cord saturated with epinephrine contains 0.5 - 1.0 mg of epinephrine available for systemic absorption

150

What is the location of Closure Stoppers?

  • Distal inclines of maxillary posterior teeth
  • Mesial inclines of mandibualar posterior teeth
  • Close to summit of elevations,or protrusive excursions will abrade them

151

What are examples of the 3rd Point of Reference for a Facebow?

  • Nasion
  • Infraorbital Rim
  • CUSTOM
  • Different 3rd point requires new eccentric records*

152

What % of complete dentures are unstable?

50%

153

Are the Hanau and Whipmix articulators fully or semi-adjustable?

Semi Adjustable

154

What is the conventional tx option for complete edentulism?

  • Conventional Complete Dentures
  • Patient declines implants
  • Good ridge anatomy (Retension & Resistance)

155

When should you bevel?

  • Metal restorations
  • Tapered wax edge is more readily adapted to a die than a butt joint
  • Gold margin can be burnished to slightly improve adaptation after casting

156

What is included in the Mechanical method of tissue management?

  • Plain retraction cord
  • Copper band with compound

157

What are 2 examples of No Contact pontics?

  1. Sanitary (3 mm off ridge)
  2. Perel (Modified Sanitary)

158

What must you use when using a Diode Laser for tissue management?

  • Appropriate eyewear
  • Special training required

159

If you preseve line angles, like facioproximal and linguoproximal corners, they help sustain circumferential morphology which enhances ____

Resistance

160

What cusps are Stamp Cusps?

  • Maxillary Lingual Cusps
  • Mandibular Buccal Cusps

161

What is a facebow?

  • Caliper-like instrument
  • Used to record spatial relationship of the maxillary arch to some anatomic reference point
  • Then transfer this relationship to an articulator

162

Describe Gnathology Articulation Philosophy...

  • MIP = CO
  • MUTUALLY PROTECTED OCCLUSION AND ARTICULATION
  • Reduced lateral stresses
  • Comfortable anterior disclusive angle
  • Teeth stabilized by tripoding of occlusal contacts (no "freedom in centric"
  • Correct tooth positions
  • Adequate spillways
  • Reduced muscle tension as a result of correct vertical dimension and adherence to principles of articulation

163

What is this occlusal scheme and what is an indication to use it?

  • Balanced Articulation
  • Simultaneous cross-arch and cross-tooth contact in MIP and eccentric movements
  • Indications: Dentures

164

What kind of records does a Celenza Classificaiton of 3a take? 

What is an example?

  • Accepts static protrusive records and uses equivalents for remaining parameters
  • Hanau 
  • Can be Arcon or Non-Arcon

165

In CR, what movment is the condyle restricted to?

Purely rotary movement about the transverse horizontal axis

166

What is this picture an example of?

Esthetic Mounting: Mounted Cast Orientation that Reproduces Patient's Orientation

167

For fixed, what is the optimum/minimal crown-root ratio?

  • Optimum 2:3
  • Minimal 1:1

168

For an Imlant Overdenture, how many implants would you like? What about the A-P spread?

  • Minimal A-P spread
  • Less than 4 implants

169

What angle should the implant be slightly placed in?

Palatal

170

If you have extensive bone loss in the anterior between canines, what are your restorative options?

RDP and FDP

Without significant bone grafting...

171

What are some examples of PMMA provisional materials?

  1. Alike
  2. Duralay
  3. Jet

172

Regarding a crown prep, what can enhance the fit of a restoration?

Smooth tooth preparation

173

What are some contraindications for a FBFDP?

  • Extensive caries
  • Nickel sensitivity
  • Excessive vertical overlap
  • Bruxism
  • Tooth mobility
  • Long span

174

When discussing Fixed vs. Removable vs. Implants, what are 9 factors that should influence your selection?

  1. Length of Edentulous Span
  2. Distal Extension
  3. Complete Edentulism
  4. Periodontal Health
  5. Radiographic Crown: Root Ratio
  6. Extensive Bone Loss of Residual Ridge
  7. Shortened Life Span Expectancy
  8. Caries Index/Oral Hygiene Limitations
  9. Patient Desires/Economic Considerations

175

What is an example of a Prefabricated provisional?

Polycarbonate Crown

176

If you have a tear in alginate, where is this likely to happen?

Thin section

177

What are some concernes when replacing a canine when considering a RDP, Implant, or FDP?

  • FDP (not in deep bite, control forces, shared disocclusion)
  • Avoid splinting multiple abutments
  • Maxillary canine has a buccal disocclusion force placing severe bending movement

178

Define Resistance...

That which prevents dislodgment of the restoration by forces directed in an apical or oblique direction and prevents any movement of the restoration under occlusal forces

179

What is an example of a Class I Celenza's Articulator?

  • Non adjustable
  • Capable of adjusting a single static registration
  • Vertical movement is possible
  • Does not allow adjustment to replicate mandibular movement

180

Regarding alginate, what 2 things contribute to less deformation?

  1. Less compression (undercut)
  2. Less TIME compressed

181

What is something you can do to "round teeth" to enhance resistance form...

grooves/boxes

182

How much space do you need inbetween implant/tooth, implant/implant?

  • 1.5 - 2 mm between implant and tooth
  • 3 mm between implants

183

Describe the "B" contact...

Stamp cusps of maxillary teeth occludewith stamp cusps of mandibular teeth

184

What are the 4 indications for tooth replacement?

  1. Esthetics
  2. Phonetics
  3. Function
  4. Occlusal Stability

185

Regarding the first principle of preparation according to Shilingburg, why is it important to conserve tooth structure, especially dentin?

  • Avoid getting too close to pulp
  • Temperature/age accumulates
  • Endo 3-23% need endo

186

Define Latero-Detrusion...

Lateral and downward movement of the condyle on the working side

187

75% of the population are within how many mm of the true hinge axis?

6 mm

188

Why would you not want to use Negatol (creosol sulfonic acid and formaldehyde) in tissue management?

Causes tissue damage

189

When doing an Esthetic Face Bow orientation, how do you prevent "The Roll"?

If the ear canals are not parallel to the esthetic plane...the mounted casts will not be properly oriented

190

What is the recommended mesurement of algiante/distilled water when mixing?

30 gm Alginate/65-70cc Distilled Water

191

A Total Occlusal Convergence of ______ degrees has been proposed as being clinically achievable and still providing adequate retention

16

192

How long does it take alginate to set?

2-3 minutes

193

What happens when you leave free water on stone?

  • Dilutes stone
  • Leaves it soft
  • Chalky

194

What are 3 examples of Full Contact pontics...

  1. Saddle
  2. Ridge Lap
  3. Ovate

195

What are 4 clinical requirments when using alginate after it has been removed from the mouth?

  • RINSE WELL with cold water
  • REMOVE FREE WATER before pouring
  • Pour within 12 minutes
  • Retrive cast in resonable time

196

When you have extensive bone loss in the anterior, why is an RDP a good choice?

  • Predictable
  • Cost-effective
  • Diagnostic
  • Esthetic

197

Describe the "C" contact...

Stamp cusps of maxillary teeth occlude with shearing cusps of mandibular teeth (lingual cusps)

198

When considering a FDP, what is your limit pontic wise for the Posterior and Incisors?

  • Posterior: 2 or fewer
  • Incisors: 4 or fewer

199

What are some indications for a Rotational Path RDP from #7-10?

  • Long anterior cantilever/rounded arch
  • Resorbed ridge
  • Canines compromised

200

Which cusps are Shearing Cusps?

  • Maxillary Buccal Cusps
  • Mandibular Lingual Cusps

201

Compared to complete dentures, overdentures have ____ less bone loss than conventional dentures...

8x

202

What are 2 purposes of Equalizers (Mesiodistal Stability)?

  • Equalizes forces exerted by closure stoppers providing mesial-distal stability
  • To assure bucco-lingual stability

203

What is the survival rate of an Implant Retained FDP after 10 years?

What is not a risk of this that is the main risk for failure in FDPs with natural teeth?

  • 90% survival after 10 years
  • No Caries!

204

What is Ante's Law?

The root surface area of the abutment teeth should equal that or surpass that of the teeth being replaced with pontics

205

What is MIP?

Maximum Intercuspal Position - COMPLETE INTERCUSPATION of opposing teeth independent of condylar position

206

What are some function of provisional restorations?

  • Prevents sensitivity
  • Esthetics
  • Diagnosis (esthetics/occlusion)
  • Establishes/stabilizes occlusion
  • Replaces missing teeth
  • Facilitates endodontics
  • Aids Periodontal surgery
  • Protects post-surgery periodontium
  • Protects and splints mobile teeth

207

Whip Mix Articulator accepts what % of lateral records?

80%

208

Define Occlusion...

STATIC CONTACT RELATIONSHIP between the occlusal-incisal surfaces of opposing teeth

209

With Overdentures, the chewing efficiency is ______ of natural teeth..

1/6

210

What is the minimum occlusocervical dimension of molars?

What should the taper be?

4 mm

10 - 20° of total occlusal convergence

211

What is the recommended measurement of bulk between the tray and teeth?

5 - 7 mm

212

What are some characteristics of Group Function Articulation?

  • Unilateral shared posterior guidance
  • Forces shared/distributed among many teeth
  • NO non-working interferences in eccentric movements

213

Buccolingual stability occurs with what contacts...

B + A or C

214

What are Hinge Axis and Terminal Hinge Axis?

215

How long can you leave an alginate before it starts to distort?

12 minutes

216

For a Fixed Detachable Hybrid, what is the equation for a Cantilever?

  • 1.5 to 2 x A-P spread