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JVD > JVD 2013, Issue 4 (JW) > Flashcards

JVD 2013, Issue 4 (JW) Flashcards

1
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

What percentage of cats are affected by periodontal disease?

A

Up to 70% of cats between 20-27 months old and up to 85% of cats older than 6 years

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2
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

What are the characteristics of the bacterium Porphyromonas gulae? (i.e., gram - or +?, spores?, shape?)

A

Porphyromonas gulae is a gram-negative, non-motile, non-spore forming, rod shaped bacterium that preferentially grows as black pigmented colonies in an obligate anaerobic environment with an asaccharolytic metabolism.

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3
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

Three bacterial species were detected in 70% or more of the samples. Which were they?

A 
Porphyromonas gulae (most abundant)
Porphyromonas circumdentaria (moderate abundance)
Fusobacterium nucleatum (low abundance)
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4
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

True or false - Cat age was positively correlated with calculus scores

A

True

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5
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

True or false - Tooth mobility was correlated with total bacterial counts

A

True

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6
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

True or false - Plaque index was correlated with tooth mobility

A

False - it was not correlated with ANY other clinical value

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7
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

True or false - Cats with more P. gulae showed more mobility and recession and tendency for deeper probing depths

A

True

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8
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

True or false - Cats with more P. gulae showed higher overall bacterial counts and a tendency for higher proportions of P. circumdentaria and higher proportions of Capnocytophaga spp.

A

False - Cats with more P. gulae showed higher overall bacterial counts and a tendency for LOWER proportions of P. circumdentaria and higher proportions of Capnocytophaga spp.

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9
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

True or false - When comparing cats less than versus greater than 10 years old, there was a significant difference detected in terms of clinical or microbiological findings

A

False - no significant differences

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10
Q

Isolation and Identification of Porphyromonas spp. and Other Putative Pathogens from Cats with Periodontal Disease

What percentage of the anaerobic flora cultured was P. gulae?

A

32.5%

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11
Q

Crown Preparation Design: An Evidence-Based Review

What is the commonly cited convergence angle that is recommended to achieve acceptable retention/resistance form?

A

5-14 degrees

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12
Q

Crown Preparation Design: An Evidence-Based Review

If the inner surface of the metal crown is etched/sandblasted, what is the resultant increase in amount of force required to separate the restoration from the die? (answer is #-fold)

A

2-3-fold

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13
Q

Crown Preparation Design: An Evidence-Based Review

The amount of force required to displace a crown [increases OR decreases?] as the convergence angle increases

A

Decreases

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14
Q

Crown Preparation Design: An Evidence-Based Review

What is the amount of force, in N, generated when dogs chew?

A

20-937 N

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15
Q

Crown Preparation Design: An Evidence-Based Review

What is the range of biting-pulling force generated on canine teeth, in N?

A

180-1120 N

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16
Q

Crown Preparation Design: An Evidence-Based Review

What is “taper”?

A

Taper is the angle between one axial wall of the preparation and the long axis of the preparation

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17
Q

Crown Preparation Design: An Evidence-Based Review

What is “convergence angle”?

A

Convergence angle is the angle between two opposing axial walls of a preparation. It equals the sum of the taper of two opposing axial walls.

18
Q

Crown Preparation Design: An Evidence-Based Review

A previous study showed that the mean convergence angle of clinically successful crowns was ___#___ degrees.

A

25.7 degrees

19
Q

Crown Preparation Design: An Evidence-Based Review

The amount of force required to dislodge a crown cemented to a die with a convergence angle of 24-degrees and a height of 4mm was increased ___#___ times when a resin-based cement was utilized instead of zinc phosphate

A

3.5 times

20
Q

Crown Preparation Design: An Evidence-Based Review

It has been shown that for a given base diameter and convergence angle, an [increase OR decrease?] in height resulted in increased retention

A

Increase

21
Q

Crown Preparation Design: An Evidence-Based Review

For a given tooth diameter and convergence angle, preparation height is [directly OR indirectly?] proportional to dislodgement resistance.

For a given height and diameter, convergence angle is [directly OR indirectly?] proportional to dislodgement resistance.

A

DIRECTLY

INDIRECTLY (article uses the word “inversely”)

22
Q

Crown Preparation Design: An Evidence-Based Review

For a given diameter, as height decreases, a [smaller OR larger?] convergence angle becomes more critical for resistance/retention form

A

Smaller

23
Q

Crown Preparation Design: An Evidence-Based Review

Preparations with height/diameter ratios greater than ___#___ may be more likely to fracture

A

1.8

24
Q

Crown Preparation Design: An Evidence-Based Review

Retention and resistance form general [increase OR decrease?] with a lower convergence angle

A

Increase

25
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

What is an example of a Class 1 malocclusion?

A

Linguoversion of mandibular canine teeth - overall neutroclusion but one or several teeth malpositioned

26
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

What is Class 2 malocclusion?

A

Mandibular distocclusion (EITHER mandibular brachygnathism or maxillary prognathism)

27
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

What are the three things orthodontic movement requires?

A
  1. Healthy teeth
  2. Destination space
  3. Clear path
28
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

What are examples of intermittent force technique?

A

Self-regulated by mouth closure, such as chewing a ball, temporary tooth extensions, or inclined plane

29
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

What techniques were utilized to treat mandibular canine tooth distocclusion (mandibular brachygnathism) in a cat, in this case report?

A

Tooth extensions, followed by thermoplastic aligners (to treat the permanent teeth)

The deciduous teeth were treated first, with interceptive orthodontics

30
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

What is considered the easiest type of orthodontic movement?

A

Tipping

31
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

What is the enamel thickness in dogs? In cats?

A 
Dogs = < 0.1 to 0.6 mm
Cats = < 0.1 to 0.3 mm
32
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

How much enamel does acid etching remove?

A

0.01 mm

33
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

What is othodontic tipping?

A

Tipping is rotation of a tooth around its center of resistance, located at the middle of the embedded root

34
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

How much force is required for translation?

A

70-120 grams

35
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

How much force is required for tipping?

A

35-60 grams

36
Q

Thermoplastic Inclined Plane Aligner for Correction of Bilateral Mandibular Canine Tooth Distoclusion in a Cat

How long are retainers recommended for?

A

2-6 weeks for simple movements; 4-12 weeks for complex movements — or, about half the time it took to complete the movement

37
Q

Odontoameloblastoma in a Calf

Where was the tumor located in the calf’s mouth?

A

Rostral mandibles

38
Q

Odontoameloblastoma in a Calf

Did the mass have any mitotic figures? If so, how many per high powered field?

A

No

39
Q

Odontoameloblastoma in a Calf

What are the stages of tooth development?

A

Bud -> cap -> bell -> appositional -> maturation

40
Q

Odontoameloblastoma in a Calf

What is the most common type of odontogenic tumor in cattle?

A

Ameloblastic fibro-odontoma (AFO)

41
Q

Odontoameloblastoma in a Calf

Should Odontoameloblastoma be treated as a benign or aggressive tumor?

A

Aggressive - it expands by infiltrating bony trabeculae and has a high rate of recurrence

42
Q

Odontoameloblastoma in a Calf

Histologically, what is the difference between Odontoameloblastoma and Ameloblastic fibro-odontoma?

A

The odontogenic epithelium is well differentiated in Odontoameloblastoma (OA) and composed of peripheral palisading ameloblasts with “reverse polarity” surrounding large areas of stellate reticulum-like tissue (enamel). The odontogenic epithelium is less differentiated for Ameloblastic fibro-odontoma (AFO) and composed of epithelial cords with peripheral palisading but scant to absent stellate reticulum-like tissue. Also, stroma is well differentiated, mature, and dense in OA and AFO stroma is highly cellular and immature.

JVD (9 decks)

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