DENT 3.2

• The bur used to make the buccal and lingual

  walls parallel to each other

  #56
• The bur used to make the wall converging

  #34
• The transmit rotational and translational

  forces to the head

  Neck
• Streptococcus mutans are____ and

  therefore____

  acidogenic, cariogenic
• When restoring a Class II or Class III lesion it

  is important to create properly shaped

  embrasures for all of the following reasons

  except one. Which one is the exception:

  A.Protection the gingival tissue, which also

  allowing stimulation of it

  B. Provide arch stability

  C. Make the teeth self-cleansing

  D. Create a spillway for food during

  mastication
• When restoring the embrasures of posterior

  teeth, the contact should be formed slightly

  buccal from center. This will create a wider facial

  embrasure

  true, false
• An excavator primarily used with a pull

  motion

  Hoe excavator
• Xerostomia is the most common adverse side

  effect of medications. This is attributed for

  cholinergic effects of many medications

  true, true
• The caries cone in enamel is larger than in

  dentin is known as:

  Forward caries
• The mineral content of dentin increases with

  age. Dentin may become softer with age as a

  result of its organic content

  true, false
• Caries that remain in a completed tooth

  preparation by accident is known as

  Residual caries
• Caries activity can be expected to increase

  in the mouth of

  xerostomia
• A type of shank which has a length of 0.520

  Latch type contra-angle handpiece
• Dentin hardness near the DEJ is about three

  times lesser than the dentin near the pulp. The

  hardness of dentin averages one fifth that of

  enamel.

  false, true
• An incipient carious lesion interproximal

  surface is usually located

  Gingival to the contact area
• This is used to prepare retentive areas on

  anterior teeth

  
  

  Ordinary hatchet
• In a carious lesions in which caries has

  extended into dentin, which of the following

  zones contains infected dentin and is not

  capable of remineralization

  Turbid Dentin
• the procedure if reshaping grooves with

  rotary cutting instrument

  Enameloplasty
• Change in dentinal structure as a response

  to slowly progressive or mild irritations such as

  mechanical abrasion or chemical erosion is

  known as

  Reactive sclerosis
• The original carious lesion of the tooth is

  known as

  Primary caries
• dentin is reversibly denatured and should be

  preserved

  Affected dentin
• Which cavities can involve any teeth,

  anterior, or posterior?

  Class I, V, VI
• All of following are associated with rampant

  caries EXCEPT

  Deep and wide
• Dentinal crystallites are slightly bigger than

  enamel crystallites. The hydroxyapatite

  crystallites of dentin are arranged in a less

  systemic manner than enamel crystallites

  false, true
• Has a circular cutting edge and a

  claw-like blade

  spoon excavator
• Describe as a combination of chisel and

  gingival trimmer

  angle former