Questions 2012 Flashcards
Give 4 features of of irreversible pulpits.
- Limited to one tooth
- Pain is sharp and doesn’t last
- Pain is release by LA
- Tooth is associated with caries, recent filling, trauma
Give 4 features of migraine.
- Duration between 4-72h
- Moderate to severely intense pain
- toothache is perceived as secondary to the headache
- 3 times more commun in women than men
- Can be associated with aura- 1/3 of the people suffering from migraines perceive aura, transient visual, sensory, language, or motor disturbances signalling the migraine will soon occur.
Give 4 features of dentin hypersensitivity.
- pain not always restricted to one tooth
- short lasting pain to cold
- improved with desensitizing age
- relieved by diagnostic LA block
Give 4 features of trigeminal neuralgia.
- Trigger point
- L.A won’t help unless the trigger point is a tooth
- Unilateral (10% bilat)
- Severe shouting electric pain that lasts a few seconds
- Normal thermal teeth test
Give 4 features of temporal arteritis.
- Throbbing headache on one side of the head of the back of the head.
- Malaise, fever, loss of appetite and wight loss
- Jaw pain and painful jaw muscles
- Vision difficulties
Give 4 features of TMD.
- Pain in the TMJ area, shoulder, ear, neck
- Difficulty to open de mouth
- Clicking on opening
- Facial pain around the TMJ, mostly in the morning
Give 4 features of acute sinusitis.
- Recent cold, nasal stuffiness and discharge
- Pain increases when the head is bellow the knees or when the patient lies down
- Fever, malaise
- Recent infection of the upper respiratory tract
- Facial pain, toothache, pain behind the eyes or constant pressure.
Give 4 features of shingles.
- Rash with listers
- Painful skin
- Headache, fever
- Unilateral, dermatome patterns
4 cardiac condition that need AB prophylactic.
- Transplant heart with valve problem
- History of infective endocarditis
- Artificial valve of mechanic valve
- Congenital cyaonic heart disease unprepared, repaired with residual defect or 6 first months after repair
Regular prescription for AB prophylactic.
Amoxicillin 2 g 1 h pre op
Patient allergic to Pen, what do you prescribe for prophylactic AB?
Clindamycin 600 mg Child: 20mg/kg 1 h pre-op
Azithromycin ou Clarithromycin 500 mg Child: 15mg/kg 1 h pre-op
Cephalexin 2 g2 g 1 h pre op Child: 50mg/kg
As instrument is rotating in the canal and the tip binds, but the motor continues to rotate. The instrument fracture- what type of fracture called?
An instrument is rotating in a curved canal and the tensile and compressive stresses that occur as a result cause fracture – what is this type of fracture called?
Cyclic fatigue: mechanical load represented by altering tensile and compressive stresses.
Does fatigue fracture increase or decrease when the degree of curvature increases?
Does the fracture resistance increase or decrease when the diameter of the file is increased?
Which part of the triple antibiotic paste results in potential discoloration?
3 things to do to decrease the risk of declaration when using Tri AB paste.
1) use the bi with metronidazole and cephalexin.
2) GI at the level od the CEJ
3) GI of flowable CR on the wall of the access cavity before the injection of the paste
4) use Ca2OH
5) CEJ should be the max height
6) Advise the patient to tell you if discolouration appears
How does dentine demineralize?
Bacteria release acids that dissolve the inorganic minerals, hydroxyapatite crystallites, first from the enamel and then from the dentin.
Bacteria cannot hydrolyze fibrous collagen and the organic matrix of the dentin, therefore it has been suggested that host matrix metalloproteinases MPS degrades the dentine organic matrix during and after the demineralization by the bacteria.
2 L.A for pregnant woman
60kg woman, what is the maximal number of cart you can use for 2% lido and 4% prilo? SHOW CALCULATION
2% lido 20mg/ml 20/mlX1.8=36mg/cart Max dose: 7mg/kg 7mg/kgX60=420mg 420/36=11.7 cart
4% prilo 40mg/ml 40/mlX1.8=72 Max dose: 8mg/kg 8mg/kgX60=480mg 480/72=6.7 cart
Two purposes of electropolishing an endo instrument.
1) Reduce micro fracture by reducing irregularities
2) Reduce corrosion
5 ways to reduce coronal leakage.
1) Adequate temporary filling
2) Adequate final filling in a reasonable time lapse
3) GI over the orifices
4) Pre-operatively changing the old restoration
5) Adequate occlusion
6 properties of ideal irrigant.
1) soluble in water
2) non cytotoxic
3) dissolve inorganic debris (Smear layer)
4) dissolve organic debris (Smear layer)
5) bactericide (antimicrobial)
6) easy to access
7) stable for storage
8) non costly
9) penetrate into the dental tubules
10) Allergy is rare
4 components of a cartridge of 2% lidocaine.
Cartridge: glass tube, rubber stopper, metal cap and rubber diaphragm
Sln: Lidocaine, epinephrine, sodium chloride, sodium bisulfite, distilled water.
3 goals of revascularization
1) tx or preventing AP
2) to trigger the continuation of the root formation
3) re-establishement of the function and sensitivity of the pulp
How long would you expect it to take to get a positive response after revascularisation
6 monts (Torabinejad)