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Osce Fifth Year > Endo Learn > Flashcards

Endo Learn Flashcards

1
Q

RCT cuspal coverage statistic

A

Study found that 94% of RCT molars receiving coronal coverage were successful compared with 56% of occlusally unprotected teeth.

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2
Q

Perforation incidence

A

2-12%

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3
Q

Diagnosis of root perforation

A

Profuse bleeding into canal
Microscope
EAL
radiograph

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4
Q

Management of root perforation

A

XLA
Attempt to repair with MTA success around 81%
Refer to specialist

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5
Q

Broken file incidence

A

0.7-6% AAE

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6
Q

Management of a broken file

A

Take X-ray
Attempt to remove - tweezers, US
Dress and refer to specialist
Bypass- WW small file alongside and EDTA to soften dentine
Accept and obturate to file
PRS/apicectomy
XLA

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7
Q

Reversible pulpitis

A

Discomfort on cold/sweet, only lasts couple of secs

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8
Q

Symptomatic irreversible pulpitis

A

Sharp pain on thermal stimulus
Lingering spontaneous referred pain
Pain may be made worse by posture changes
OTC analgesics typically ineffective

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9
Q

Pulp necrosis

A

Non responsive to pulp testing
Asymptomatic

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10
Q

Symptomatic apical periodontitis

A

Painful response to biting or percussion or palpation
May have Radiographic changes

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11
Q

Asymptomatic periapical periodontitis

A

Apical RL

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12
Q

Chronic apical abscess

A

Inflammatory reaction to pulpal infection and necrosis
Gradual onset
Little or no discomfort
Intermittent discharge of pus through an associated sinus tract
Typically RL

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13
Q

Acute apical abscess

A

Inflammatory reaction to pulpal infection and necrosis
Rapid onset
Spontaneous pain
Extreme tenderness of tooth to pressure
Pus formation and swelling of associated tissues
May be no Radiographic signs of destruction
Often malaise, fever, lymphadenopathy

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14
Q

Condensing osteitis

A

Diffuse Radiopaque lesion representing a localised bony reaction to a low grade inflammatory stimulus, usually seen at apex of tooth

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15
Q

Protaper sequence

A

10 and 15 to 2/3 EWL
S1 to 2/3 EWL
10 and 15 find CWL
S1 S2 then Fs to CWL

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16
Q

Favourable post design

A

Parallel sided
Non threaded
Cement retained

17
Q

Ferrule

A

Circumferential 1-2mm vertical coronal dentine, supragingival, within walls of crown, 360 degrees
Get ferrule effect - resistance form, reduce risk of fracture of root

18
Q

Cast post lab script

A

Please pour up impressions
Please construct cast post and core
Parapost colour
Core six degree taper
Please leave 2mm space in occlusion for crown
Enclosed reg or opposing imp or shade

19
Q

Methods of post removal

A

US
Trephan eg masseran
Eggler device
Moskito forceps screw retained
Sliding hammer
Anthogyr safe relax
Stieglitz forceps

20
Q

Which post is better

A

2017 SR. - no evidence to suggest survival rate better with one or other

21
Q

six guidelines for post placement

A

Tooth type
Root filling length
Post width
Sufficient alveolar bone support, at least half of post length into root
Min 1 :1 post length crown length ration
Ferrule 1.5mm

22
Q

When to use R25

A

If canal partially or completely invisible on pre op X-ray
If ISO 20 doesn’t go passively to WL

23
Q

When to use R40

A

If ISO 20 goes passively to WL

24
Q

When to use R50

A

If ISO 30 goes passively to WL

25
Q

Advantage of reciproc

A

Reduces risk of file separation compared to rotary

26
Q

Rotary

A

Protaper gold
Continuous clockwise rotation like a drill
Instrument spearstion

27
Q

What is reciprocation and example

A

Waveone gold
Unequal bidirectional CW and ACW directions

28
Q

Why is reciproc good for curved canals

A

Good cyclic fatigue resistance

29
Q

What % of u6s have an MB2

A

93%

30
Q

What does D1 Protaper retx file have

A

An active working tip to facilitate initial penetration

31
Q

How to use Protaper retx files and speed

A

Remove files freq and inspect flutes
Continue as long as GP visualised between cutting blades
Speed of handpiece used. 500-700 rpm
300 for paste

32
Q

Solvents for GP removal

A

Eucalyptus oil and chloroform

33
Q

Direct pulp cap requirements

A

Asymptomatic
Vital
No history of irreversible pulpitis
Small exposure
Surrounding D relatively hard

34
Q

Direct pulp cap process

A

Arrest haemorrhage- copious irrigation with sterile saline
Disinfect with CHX 0.2%
Dry with sterile CW pledgers don’t air dry
Pulp cap - hard setting caoh cement (dycal/life) or MTA or biodentine
Vitrebond lining
Continue to monitor, if symptomatic RCT required

35
Q

Indirect pulp cap process

A

Clean with 0.2% CHX
Stained firm dentine left in situ, cover with a setting CaOH cement - Dycal or life - need covered with vitrebond. Or calcimol- light cure CaOH - used as lining or indirect pulp cap
Provisional restoration - tooth must be vital, asymptomatic, no history of pulpitis
Monitor for 3m - if vital and asymptomatic remove provisional restoration. Excavate stained dentine and restore
any symptoms need RCT

Osce Fifth Year (1 decks)

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