2012 paper Flashcards
3 materials for crowns
All ceramic crowns
PJC
All metal
Procelain fused metal
What is the purpose of a post?
For retention of the core
What are 3 types of posts?
Cast metal Ceramic Fibre Threaded, serrated or smooth Parellel sided or tapered
What is the name given to the residual collar or dentine required before placing a post?
Ferulle
How much GP should be left in canal space when placing a post?
4-5mm
What are 2 forms of bone loss shown in radiograph?
Horizontal bone loss
Vertical bone loss
What are 3 characterstics of a ghost image?
Higher due to negative vertical beam angulation
Horizontally projected and horizontally magnified
Radiopaque
Changes in antero-posterior position
3 ways dose to patient is reduced?
Rectangular collimation F speed film/ digital sensor Use film holders and beam aiming device Justification Focus to skin distance @20cm
Difference between compton scatter and photoelectric effect?
Compton contributes to patient dose
Photoelectric contributes to image contrast and patient dose
What is the metal used to absorb heat during x rays production
Lead/copper
Name another metal used in xray production?
Aluminuium for filtration
What is EADT and EAT?
Extra alveolar drying time - time tooth is out the mouth
Extra alveolar time - amount of time the avulsed tooth has been out the mouth including any storage medium
What are 3 stroage mediums for an avulsed tooth?
Saliva
Cold milk
Saline
Blood
2 pieces of info you would give to someone about an avulsed tooth?
Hold by crown only
Wash in cold running water and let water flow
replace in socket and get person to bite on it with tissue or store in saliva/milk
Seek immediate attention
What type of splint do you use for a subluxation?
Flexible splint for 2 weeks
What is the fluroide regime for high risk 4year old
1350-1500ppm toothpaste
22,600ppm fluroide varnish x2/x4 a year
What age is it suitable to give a child mw?
> 8years old
What is the toxic dose of toothpaste and how to treat
5mg/kg
<5mg - oral calcium milk and observe
5mg-15mg - oral calcium milk and admit to hosiptal
>15mg - urgent refer to hosiptal for IV calcium gluconate and caridac monitoring
What is the thickness of shimstock?
10micrcrons/ 8
Biologic width?
2mm - deepest part of sulcus to alveolar bone
What are uses for CHX?
ANUG Trauma incidents Immunocompormised patients Candidosis Post surgical procedure
CHX delivery?
0.2% 10ml - 1min x2 day = 20mg
What are the ways in which CHX is diminshed in eiffcacy by the patient?
food
other drugs
toothbrushing
What is meant by substantivity?
Presistance of action of a drug
What does TID mean?
3 times a day
What is a common side effect of phenytoin?
Causes gingival hyperplasia
Name 2 other drugs that can cause gingival hyperplasia?
Immunosuppressants - cyclosporin
Calcium channel blockers - nifedipine/amoldopine
2 ways gingival hyperplasia can be treated?
Gingivectomy
By sealing
Changing medication patient is on
What are 3 signs of ANUG
Halitosis Pseudomembrane formation Gingival bleeding Regional lymphadenopathy Painful ulcerations of the tips of the interndetal papilla
What MW is given to ANUG patients?
0.2% CHX x2 days
What antibiotics can be used to treat ANUG?
400mg metronidazole x 3day for 3 days
500mg amoxicillin x 3day for 3-5days
When would you give antibiotics for ANUG?
If evidence of spreading infection or systemic involvement
What are the 5A’s in smoking cessation
Ask Advise Assess Assist Arrange a follow up
What are 4 indications to extract a tooth?
Gross caries Ortho Ectopic tooth Patient did not want endo Traumatic position Chemo - poor prognosis
2 drugs to watch out for when carring out XLA
Warfarin - anticogulant`
Aspirin - antiplatelet - risk of clot not forming correctly`
Name the surgery used to repair cleft lip and palate?
Orthognathic surgery
