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Fixed Pros - ABGD Oral Boards > Fixed Pros/Implants Mock Oral Boards > Flashcards

Fixed Pros/Implants Mock Oral Boards Flashcards

1
Q

What’s the purpose/uses of a diagnostic mounting?

A
  • Simulation of mandibular movement
  • Occlusal plane analysis
  • Space analysis
  • Diagnostic preparations
  • Diagnostic waxings
  • Analysis of articulation and disclusion
  • Evaluation of tissue and tooth morphology
  • Evaluation of ridge relationship
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2
Q

Describe a Celenza Class I…

A
  • A simple holding instrunebt capable of acepting a single static registration
  • Vertical motion is possible
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3
Q

Describe a Celenza Class II…

A
  • An instrument that permits horizontal as well as vertical motion but does not orient the motion to the temporomandibular joints
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4
Q

Describe a Celenza Class III…

A
  • An instrument that simulates condylar pathways by using averages or mechanical equivalents for all or part of the motion
  • These instruments allow for orientation of the cast relative to the joints and may be arcon or nonarcon instruments
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5
Q

What records do a Celenza Class 3a and 3b accept?

A
  • 3a: Accepts protrusive record
  • 3b: Accepts lateral records
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6
Q

Describe a Celenza Class IV…

A
  • An instrument that will accept three dimensional dynamic registrations
  • These instruments allow for orientation of the cast to the temporomandibular joints and replication of all mandibular movement
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7
Q

What is an ARCON type of articulator?

A
  • The angle of the condylar inclination relative to the occlusal plane of the maxillary teeth remains constant for all interocclusal positions.
  • Condyle on the mandibular element
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8
Q

What is a NON-ARCON type of articulator?

A
  • The angle changes constantly with changes in the interocclusal positions
  • Condyle on the maxillary element
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9
Q

What type of Articulator is a Whipmix and what records does it accept?

A
  • Celenza 3B
  • Arcon
  • Semi-adjustable
  • Accepts lateral and protrusive records
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10
Q

What is the purpose of a facebow?

A
  • Relate the maxillary arch to some anatomic reference point or points and transfer that relationship to an articulator
  • Anatomic references are mandibualr condyles transverse horizontal axis and one other selected anterior (3rd) point
  • Additionally provide an accurate transfer of occlusal and incisal planes to ensure that what the technician sees is the same as what the dentist sees clinically
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11
Q

What is the definition of centric relation?

A
  • A maxillo-mandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective disks with the complex in the anterior-superior position against the slopes of the articular eminences. This position is independent of tooth contact.
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12
Q

Name 4 clinical techniques to obtain CR records…

A
  1. Chin Point Guidance
  2. Bimanual Manipulation
  3. Leaf Gauge
  4. Lucia Jig
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13
Q

What is Centric Occlusion?

A
  • Occlusion of opposing teeth when the mandible is in centric relation
  • May or may not coincide with MI
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14
Q

What is the ideal occlusal scheme for a dentate pt being restored with fixed restorations?

A
  • Mutually protected articualtion in fixed restorations (anteriors protect posteriors in eccentric, posteriors protect anterior in MIP).
  • Ideally centric occlusion and MIP should be coincident
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15
Q

What factors do you consider when restoring a patient in CR vs. MI?

A
  • MI
    • Single crown or limited number of fixed restorations
    • No change in incisal guidance, VDO, plane of occlusion
    • CR slide is not causing problems: minimal occlusal wear, absence of bruxism
  • CR
    • CR slide is causing or could lead to significant problems:
      • wear
      • fractured teeth
      • fractured porcelain
    • When you have good control of occlusal scheme: extensive restorations planned
    • Minimal slide, easily corrected by equilibration
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16
Q

What contacts make up tripodal contacts?

A

A, B, C

17
Q

Which combination of occlusal contacts provide occlusal stability?

A
  • A & B
  • B & C
  • A, B, & C
18
Q

Define closure stoppers…

A
  • Distal incline of maxillary posterior teeth
  • Mesial inclinces of mandibular posterior teeth
  • Stops closure of mandible
19
Q

Define Equalizers…

A
  • Mesial incline of maxillary posterior teeth
  • Distal inclines of mandibular posterior teeth
  • Equalizes forces by CS
20
Q

What is the leading cause of failure in fixed prosthodontic restorations?

A

Caries

21
Q

What are the differences between the preparations for an FGC and an e.max crown?

A
  • FGC
    • Margin: chamfer, bevel
    • Occlusal clearance: 1 mm minimum on non functional
    • Axial reduction: 1 mm min
  • E.max
    • Margin: wide rounded chamfer
    • Occlusal clerance: 1.5 - 2.0 mm min
    • Axial reduction: 1 mm min
22
Q

Remember picture of implant going into a tooth?

What went wrong?

How could you avoid this?

What are your treatment options at this point?

What are the other possible complications?

A
  • Taking conebeam, using surgical guide, take xray while placing implant
  • Remove implant, graft
  • Can place new implant, check vitality of premolar
23
Q

Talk to me about space requirements needed for implants and their restorations…

A
  • @ CEJ 7 mm
  • 1.5 - 2 mm between implant and root @ CEJ
  • 3 mm between implants
  • 7 mm from platform to occlusal surface (5 mm if screw retained)
  • 2 mm from max sinus or IAN (depends on drill shape)
  • 1-2 mm from platform edge to cortical plate
  • 8-12 mm crest to occlusal plane (Misch), Max 15 mm (over consider implant supported overdenture)
  • > 12 mm crest to occlusal plane for implant supported OD (Misch)
  • Enough clearance for handpiece, drill
24
Q

What are the different timing options for implant placement following extraction?

A
  • Immediate placement
    • 4 - 5 mm of implant in bone for stability (apical & palatal)
  • Delayed immediate (8 weeks - 3 months) (allow oseoid component to develop)
  • Delayed (3 + months)
    • Graft Materials
      • Autogenous - 6 months
      • DFDBA - 6 months healing prior to implant placement
      • FDBA - 4 months healing prior to implant placement
      • Bio-oss - 6 months
      • Bio-oss collagen - 6 - 12 months
25
Q

At what level should the implant platform be placed?

Why?

A
  • 3 - 4 mm apical to adjacent CEJ(s)
  • To allow for development of natural emergence profile
26
Q

When delivering an implant supported crown, how do you evaluate your occlusal and interproximal contacts?

What’s the goal?

A
  • Occlusion: holds shim X 3, drags 1, no excursive contacts
  • Proximal: drag 1 shim
27
Q

What are common features of / guidelines for a successful post?

A
  • Ferrule
  • Adequate length
    • 2/3 length of root, 1/2 length of root in bone, > clinical crown
  • Anti-rotation (cast)
  • Minimal removal of radicular dentin
28
Q

What are the advantages and disadvantage of a Fiber post?

Compare and contrast that to cast post-core…

A
  • Carbon fiber - black and unaesthetic
  • Fiber reinforced composite post - tooth colored
  • Similar MOE as tooth
  • BUT question of flexibility of core on top - debonding, cement degraduation, recurrent caries
  • Bonded with resin cements
  • Difficulty with bonding resin cement in canal (except Rely-X Unicem)
  • Some are radiolucent
  • Most in vitro studies show more favorable fractures (i.e. potentially restorable) vs. metal
  • Retrospective studies show similar success rates as metal posts, just different failure modes (higher fractures, recurrent caries)
29
Q

What are the different pontic types, advantages of and where would they be used?

A
  • Saddle/Ridge lap - shouldn’t be used
  • Hygienic - have no contact w/ridge - Perel modification (arch), conventional - man molars
  • Conical (blunt bullet) - thin ridges, “nonappearance zone”
  • Modified ridge lap: Max anterior, posterior, Man anterior
  • Ovate: most esthetic: Max and Man anterior
30
Q

What location would you place the male and female components of a non-rigid connector in relation to a pier abutment?

A
  • Avoid rigid splinting of the abutment, utilize a non-rigid connector in distal of pier abutment (Keyway in distal pier, Key in mesial pontic)
31
Q

What is this?

What are its advantages?

Disadvantages?

A
  • Custom ti-base abutment and crown
  • Esthetic margin placement, adequate tisse support, Ease of cement cleanup
  • Cost, time, increased technical knowledge
32
Q
  • A 21 year old pt presents to your clinic with CC: “This baby tooth is starting to bother me.” Pain: 8/10 with chewing.
  • Clinically exam reveals #K Class 2 mobility, movement, palpation, percussion reproduce CC. No other problems are found upon your clinical exam
  • In order to help you decide which tx option to puruse you need some information
    • What information do youw want?
A
  • Health hx: underlying med conditions to preclude implants, contraindications: uncontrolled DM, past use of IV bisphosphonates, immunosuppressive drugs (poor bone turnover), uncontrolled underlying systemic diseases, radiation to area, some chemotherapeutic drugs, relative contraindications: smoking, osteoporosis
  • Potential abutment teeth: Vitality tests, existing restorations, mobility, appropriateness for FPD abutments (angle, height)
  • Casts: restorative space M-D, interarch space, ridge space, ridge shape, ridge undercuts, can ridge map
  • Occlusion: mutually protected or at minimum providies for protection of implant restoration in excursions
  • Radiographs
    • Per XR
    • Pano
    • CBCT
    • Vital structures, adequate space, volume of bone
33
Q

What is the most important dimension of color?

A

Value

34
Q

Which value can you correct - High or low?

A
  • High - stains or roughen surface
35
Q

What are the etiolgoies of a gummy smile?

How do you correct each of them?

A
  • Altered passive eruption: crown lengthening
  • Vertical maxillary excess: orthognathic surgery
  • Hyperactive lip/short lip - you can’t very predictably, training, botox
  • Dentoalveolar extrusion: Ortho
  • Medication induced gingival overgrowth: change meds, SCRP, gingivectomy
36
Q

What is the correct term for the internal aspect of a crown?

The external?

A
  • Intaglio
  • Cameo

Fixed Pros - ABGD Oral Boards (2 decks)

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