Perio Flashcards

(56 cards)

1
Q

4 components of periodontium

A

Gingiva, PDL, Cementum, Alveolar bone

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2
Q

Oral mucosa is what kind of epithelium

A

Stratified squamous (most keratinized/parakerantinzied)

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3
Q

What oral tissue is not keratinized

A

Sulcular and junctional

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4
Q

What is the primary cell of the stratified squamous epithelium

A

keratinocyte

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5
Q

What are rete pegs

A

extension of the gingival epithelium that integrate into the CT “dermal papilla”

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6
Q

4 functions of cervical fluid

A

cleanse, adhesion via plasma proteins, antimicrobial properties, antibody activity

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7
Q

What is the lamina propria

A
  • Connective tissue
  • Papillary layer – dermal papilla
  • reticular layer – continuous with periosteum
  • Cellular - fibroblasts, collagen, glycoproteins, macrophages, neutrophils, etc
  • extracellular - ground substance (proteoglycan, glycoproteins, water), type 1 collagen
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8
Q

Rests of Serres

A

Remnant of dental lamina in gingiva

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9
Q

Predominant cells in PDL

A

Fibroblasts

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10
Q

What anchors cementum to the alveolar bone

A

Sharpeys fibers (type 1 collagen)

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11
Q

What are the 6 types of periodontal fibers and what is the most abundant

A

Transeptal, alveolar, horizontal, oblique, apical, interradicular
Mosts abundant = oblique

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12
Q

What are the three types of cells of PDL

A

PDL comes from the dnetal sac or follicle
Cells - fibroblast, cementoblasts, osteoblasts

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13
Q

What are the epithelial rests of malassez

A

Remnants of hertwig root sheath (forms the outer and inner enamel epithelium)

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14
Q

What is the main type of CT in cementum

A

Collagen 1

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15
Q

Where is the thickest and thinnest parts of cementum

A

thickest - apically
Thinnest - coronally

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16
Q

What are the 2 main types of cementum

A

Acellular - primary – cervical root
Cellular - secondary - apical root

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17
Q

What is the most common type of CEJ morphology in the dog and cat

A

Dog - type 3
Cat - type 4

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18
Q

Where is rankl present on
Where is OPG present on

A

Osteoblast

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19
Q

What is Rank present on

A

Osteoclast

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20
Q

What is biological width

A

2mm
Is the soft tissue attachment – junctional epithelium and connective tissue

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21
Q

How long does it take for plaque biofilm and calculus to form

A

Plaque - 24 hr
Calc - 48-72 hr

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22
Q

What type of bacteria is found in early and late biofilm

A

early - g+ aerobic
late - g- anaerobic

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23
Q

What cytokines are stimulate osteoclast activity in PDz

A

IL1B, IL6, PGE2, TNFa

24
Q

What is prostaglandin E2 produced by

A

Macrophage and fibroblasts

25
What type of matrix metalloproteinases are found in healthy and PDz tissue
MMP1- secreted by fibroblasts to maintain CT MMP8/9- secreted by neutrophils in PDz
26
What are 2 types of anti-inflammatory cytokines
IL10 and TGF b
27
Breeds of cats and dogs predisposed to PDz
Cat- abyssinian, somali Dog - Min Schnauzer, maltese, sighthound
28
Attachment loss
pd probing depth + GR - GE
29
What organs does PDz have systemic effect on
Kidney - microalbuminuria and increased creatinine Liver -- c-reactive proteins Myocardium (left AV) -- endocarditis
30
Soft accumulation of bacteria, food, cellular debris that is white
Materia Alba
31
Primary supraginigval bacteria dog
Gram - in healthy *neisseria *bergeyella Gram + in PDz
32
Subgingival bacteria dog
Healthy = gram - * bacteriodetes, fusobacterium and proteobacteria PDz = gram + * firmicutes, bacteriodetes and proteobacteria
33
Supragingival bacteria cat
g- in healthy and + in Pdz gram –ve’s: Pasteurella spp. Moraxella spp. Thermomonas spp
34
Subgingival bacteria cat
Mainly g- healthy/pdz = bacteriodetes and proteobacteria) and spirochetes **not the same subspecies though
35
red complex
p. gingivalis treponema denticola tanneralla forsythia
36
How to tell if an instrument is dull/sharp
Dull - reflect light Sharp - edges dont reflect light
37
What stones need oil/water and what stones dont
Dont - ceramic (or water) Need oil - arkansas and india
38
What are the sharpening angle for scalers, curettes, elevator/luxator, osteotome, ochsenbein, scissors
Scalers/curettes – 110° (toe at 45°) Elevators, luxators – 45° Osteotome – 45° Ochsenbein – 20° Scissors – flush (10 °)
39
What is the power of low speed handpiece? What do green, blue, red bands mean?
Power - 20,000-40,000 rpm Green = REDUCTION ratio *Green 4:1 = 4x slower = 5000rpm Blue ring (or no colour) = no gear ratio = 1:1 ratio = same speed, 20,000rpm Red = INCREASE ratio *Red 1:5 = 5x faster = 100,000rpm
40
what is the speed of high speed handpiece
350,000-400,000 rpm
41
What is the frequency of of electrosurgery vs radiosurgery
Electro- 0.5-2.9 MHz Radio- 3-4 MHz
42
What are the 4 types of waveforms (radiowave)
**Fully filtered waveform: pure, continuous flow of current; smoothest incision; least amount of thermal necrosis and tissue shrinkage; YES to close proximity to bone. **Fully rectified waveform: simultaneous cutting and hemostasis; slightly wider zone of thermal damage and more tissue shrinkage; NOT be used in close proximity to bone or dental hard tissues. **Partially rectified waveform: intermittent flow of energy; effective hemostasis while causing more thermal necrosis and tissue shrinkage; NOT suitable for gingivectomy/gingivoplasty **Fulguration: most destructive; considerable thermal necrosis, tissue shrinkage and scarring. ABSOLUTELY NOT for gingivectomy/gingivoplasty
43
What are the 3 types of crown lengthening
1- GV 2- apically repositioned flap 3- forced eruption with Ortho
44
Osteoconduction
material that occupy space-- scaffold
45
osteoinduction
Growth factors and hormones to produce new bone
46
osteogenic
live cells to lay down bone
47
allograft
same species, different individual conductivee/inductive
48
alloplast
synthetic conductive
49
autogenous
same individual conductive/inductive/osteogenic
50
xenograft
diff species conductive
51
What are the 4 possibilites of GTR invasion and what are the results
**gingival epithelial cells grow in 1st, long junctional epithelium results, which may be unstable and has high chance of PP recurrence. **connective tissue grows in 1st, fibers will be parallel to root surface and alveolar bone will regenerate w/o connection to cementum. **bone grows in 1st, RR and ankylosis usually occur **PDL cells proliferate coronally can new cementum occur, restoring healthy attachment.
52
What are the indications for GTR
FE2 2/3 walled vertical sites 3 walled palatal defect
53
What are the three main types of flaps
envelope - linear margin with no vertical incision pedicle - two vertical releasing incision Triangle - 1 vertical releasing incision
54
Layers of epithelium
Corneum granulosum Spinousum basale
55
Zones of pulp (out to inner)
1. odontoblastic process 2. predentin 3. odontoblast 4. cell free zone (zone of weil) 5. cell rich zone 6. Pulp
56
What dose the periodontium look like under the scope