1.1

• The bur used to make the buccal and lingual

  walls parallel to each other

  #56
• The bur used to make the walls 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 excavators
• 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
• 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
• Ribbon like bundles of poorly calcified rods

  causing lateral spread of caries on DEJ are

  known as

  Enamel tufts
• Dentin formed after root completion

  Secondary dentin
• Which tooth requires special attention when

  preparing the occlusal aspect for a restoration?

  Mandibular first bicuspid
• This provides a bearing surface to control

  the alignment and concentricity of the instrument

  
  

  Shank
• dental plaque is believed to adhere to the

  teeth because

  dextrans are insoluble and sticky
• the initiation of caries four entities. Which of

  the following is NOT one of them?

  A.Host

  B. Time

  C. Saliva

  D. Carbohydrates

  E. Bacteria
• Sealants can be effective when placed over

  incipient carious lesions because caries is

  caused by anaerobic microorganisms

  statement is not correct but the reason is correct
• pit and fissure caries is USUALLY

  characterized by cones of decay that are

  base to base at the DEJ
• Chronic caries is characterized by all of the

  following EXCEPT one. Which one is the

  EXCEPTION?

  A.Common in adults

  B. Slowly progressing or arrested

  C. Pain is common

  D. Extrinsic pigmentation
• Instruments used for handling resins are

  made of

  Teflon coated metal
• This must be removed and not

  remineralizable

  Infected Dentin
• Dentin that is reversibly denatured and

  should be preserved

  Affected DEntin
• This is formed by replacement odontoblasts

  in response to moderate-level irritants

  Sclerotic Dentin
• Caries found on the gingival third on the

  distal surface of 46 is classified as:

  Class V
• Chemicomechanical loss of tooth tissue is

  termed

  Erosion