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perio 3rd yr > lecture 7 > Flashcards

lecture 7 Flashcards

1
Q

recall for patients during ortho how long?

A

2-3 months

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2
Q

ortho for longer than how many years can cause tooth resorption

A

6 yrs

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3
Q

factors that determine presence and form of pappillae?

A

alveolar bone crest height, shape of tooth, distance and inclincation between teeth. diverging of the teeth due to ortho.

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4
Q

if contact beyond _____ mm more likely to cause black triangle

A

5mm

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5
Q

options for treatment of black triangle?

A

parallel the roots through ortho, mucogingival surgery with coronally positioned flap. stripping mesio-distal enaml reduction. square teeth out and reposition

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6
Q

what happens when tooth is moved outside of bony housing?

A

no bone will form, but a dehiscence will

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7
Q

common reasons for perforation of cortical plate?

A

mandibular anteriors frontal expansion, maxillary posteriors when fixing cross bite, maxillary incisors when fixing overjet and jiggling of teeth

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8
Q

Before any kind of orthodontic therapy is started, it is important to
check the bucco-lingual thickness of the bone and soft tissues on
the __________ side of all teeth, which are to be moved.

A

pressure

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9
Q

When tissues are delicate and thin, careful instructions in adequate
plaque control measures should be provided in order to reduce the
risk for development of labial _________

A

gingival recession

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10
Q

If surgical intervention is considered necessary in order to reduce
the risk for development of soft tissue recessions, this should aim at
increasing_______________(e.g. grafts), and not
the ___________________

A

thickness of the covering tissue not the apico-coronoal width of the gingiva

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11
Q

is pretreatment evidence of periodontal tissue destruction a contrainidcation for ortho?

A

no

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12
Q

how does periodontal trt help ortho

A

control of inflammation, frenectomy, gingivectomy, correction of altered passive eruption, correction of recession, lack of attached keratinized tissue, impacted tooth exposre

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13
Q

if youre probing an inflamed pocket, what are you reaching

A

CT

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14
Q

if probing in health patient, where are you probing?

A

at JE

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15
Q

side effect of frenectomy?

A

loss of interdental papilla

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16
Q

difference between frenotomy and frenectomy

A

frenecomy is cutting the muscle, frenotomy is removal of the attachment of frenum to gingiva and periosteum is severed. frenum is relocated several mm up on to the alveaolar mucosa

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17
Q

downfall of frenotomy

A

relapses. but better esthetic results

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18
Q

when should you go a frenotomy or frenectomy in relation in treatment?

A

after or towards the end of trt

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19
Q

why could a gaft not work?

A

wont work if tooth is still moving

20
Q

how does ortho trt help periodontium?

A

improvie OH, correction of infrabony defects, correction of overjet/overbite, molar uprighting/furcation involvement, space creation for implant therapy, teeth extrusion, teeth intrustion, correction of recession, correction of traumatic occlusion

21
Q

Infrabony/ angular bony defects may

develop as a result of what 2 things

A

as a result of destructive periodontitis
- by orthodontic tipping and/or intruding
movements of teeth harboring plaque

22
Q

Orthodontic movement of teeth into inflamed

infrabony defects may create higih risk for what

A

a high risk for additional

periodontal destruction

23
Q

how do you eliminate angular bony defects with ortho treatment?

A

bodily movement into the infrabony defect

24
Q

what happens to furcation involved dentition?

A

it either remains the same or gets worse. simultaneous extrusion may worsen this specially in presence of inflammation

25
Q

is reduction in vertical bone height a contraindication for ortho tooth movement towards or into the constricted area?

A

no bc bone may form ahead of the moving tooth

26
Q

keys to movement into compromised bone areas?

A

light forces and excellent oral hygeine

27
Q

indications for extrusion?

A

increase clinical crown length, or to shallow out intraosseous defects

28
Q

what is maintained during extrusion?

A

relationship between CEJ and bone crest

29
Q

reason for extrusion with periodontium what stays the same?

A

single tooth needed to be extracted. allows good bone and gignival margin for future implant. MCJ stays the same

30
Q

reason for extrusion without periodontium?

A

if tooth has crown/root fracture or subgingival fractures.

31
Q

what is needed for extrusion w/o periodontium

A

fiberotomy every 2 weeks to remove coronal protion of fiber attachment around the tooth

32
Q

what is important during active intrusion?

A

professional subG scaling

33
Q

if you move a tooth lingually what occurs to the tissue?

A

increase in thickness of labial soft tissue, increase in gingival height, decrease recession and bone dehiscence

34
Q

explain periodontally accelerated osteogenic orthodontics

A

cortical bone scarred surgically on both labial and lingual side of teeth to be moved. bone grafting, patient seen every 2 weeks.

35
Q

bone healing pattern of PAOO

A

regional acceleratory phenomenon - RAP

36
Q

in PAOO what flaps are placed where

A

full thickness coronally and split more apically

37
Q

what kind of forces used in PAOO

A

heavy for 4-6 mo

38
Q

contraindicaitions for PAOO

A

recession, periodontitis, to treat sever posterior corss bite and bi maxillary protrusion with gummy smile

39
Q

what can happen with PAOO

A

loss of vitality, interdental bone loss, loss of attachment, periodontal defscts, subcutaneous hematomas of face and neck- pain and swelling

40
Q

disavantage of corticision?

A

no bone augmentation

41
Q

interproximal bony incisions with chisels and mallets to induce regional accelaratory phenemnon?enhanced turnover rate of surrounding structures

A

corticision

42
Q

flapless, minimally invaseive ortho accelerated- 2

A

peizocision and corticision

43
Q

advantages of peizocision?

A

increase thicker periodontium bucally, grafts placed, reduced ortho timr, minimal discomfort, stronger periodontium

44
Q

combination of microincisions with selectie tunneling that allows for peizeo electric incision and hard or soft tissue grafting where needed.

A

peizocision

45
Q

Temporary anchorage device (TADS) are what

A

mini implants used- superior to any orthodontic tooth-borne anchorage device

perio 3rd yr (7 decks)

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