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OPD > SAS 3 Clinical Significance of Oral Anatomy, Histology,Physiology and Occlusion to Operative Dentistry > Flashcards

SAS 3 Clinical Significance of Oral Anatomy, Histology,Physiology and Occlusion to Operative Dentistry Flashcards

1
Q

The primary dentition consists of ?

A

10 maxillary and 10 mandibular teeth

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2
Q

Permanent dentition consists of how many teeth ?

A

16 maxillary and 16 mandibular teeth

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3
Q

The primary and permanent dentitions include?

A

Incisor, canine and molar classes

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4
Q

The fourth class of human teeth is the?

A

Premolar

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5
Q

Where does the premolar or the fourth class found?

A

Only in permanent dentition

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6
Q

cutting or shearing instruments for food, essential for proper esthetics of the smile, facial soft tissue contours (lip support) and speech (phonetics).

A

Incisors

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7
Q

possess the longest root of all teeth, corners of the mouth. They function in the seizing, piercing, tearing and cutting of food.

A

Canines

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8
Q

serve a dual role in function, they are similar to canines in tearing of food and are similar to molars in the grinding of food.

A

Premolars

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9
Q

serves as fulcrum during function. Have a major role in crushing, grinding and chewing of food to the smallest dimensions.

A

Molars

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10
Q

covers the anatomic crown of the tooth and varies in thickness in different areas.

A

Enamel

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11
Q

is thicker at the incisal and occlusal areas of a tooth and becomes progressively thinner until it terminates at the cementoenamel junction.

A

Enamel

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12
Q

It is semi translucent, and the color of a tooth which varies from light yellow to gray-white depends on the color of the underlying dentin, thickness of the enamel and amount of stain in the enamel.

A

Enamel

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13
Q

is composed of 4% water by weight.

A

Enamel

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14
Q

is a highly mineralized crystalline structure containing from 95% to 98% inorganic matter by weight.

A

Enamel

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15
Q

in the form of a crystalline lattice, is the largest mineral constituent and is present 90% to 92% by volume.

A

Hydroxyapatite

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16
Q

is composed of millions of enamel rods or prisms, which are the largest structural components, and rod sheaths and a cementing interrod substance in some areas.

A

Enamel

17
Q

are KNIFE EDGE OR ORIENTED OUTWARD IN A SLIGHTLY APICAL DIRECTION.

A

Permanent teeth

18
Q

are KNIFE EDGE OR ORIENTED OUTWARD IN A SLIGHTLY APICAL DIRECTION.

A

Permanent teeth

19
Q

are specialized connective tissues of mesodermal origin, formed from the dental papilla of the tooth bud.

A

Dentin and pulp tissues

20
Q

is considered living tissue with the capability to react to physiologic and pathologic stimuli.

A

Dentin

21
Q

Externally, it is covered by enamel on the anatomic crown and cementum on the anatomic root.

A

Dentin

22
Q

Forms the walls of the pulp cavity ( pulp chamber and pulp canals )

A

Dentin

23
Q

is approximately 75% inorganic material, 20% organic material, and 5% water and other materials.

A

Dentin

24
Q

Which is less mineralized ? Dentin or enamel ?

A

Dentin

25
Q

More mineralized than cementum or bone

A

Dentin

26
Q

During tooth preparation, dentin usually is distinguished from enamel by ?

A

Color, reflectance,hardness and sound.

27
Q

is normally yellow white and slightly darker than enamel.

A

Dentin

28
Q

TRUE OR FALSE,

In older patients, dentin is darker, and it can become brown or black in cases in which it has been exposed to oral fluids, old restorative materials, or slowly advancing caries.

A

True

29
Q

surfaces are more opaque and dull, being less reflective to light than similar enamel surfaces, which appear shiny.

A

Dentin

30
Q

TRUE OR FALSE

Dentin is softer than enamel?

A

True

31
Q

occupies the pulp cavity in the tooth.

A

Dental pulp

32
Q

is circumscribed by the dentin and is lined peripherally by a cellular layer of odontoblasts adjacent to the dentin.

A

Pulp organ

33
Q

2 division of pulp organ

A

Coronal pulp and radicular pulp located in the pulp canals in the root portion of the tooth

34
Q

4 functions of the pulp

A
  1. Formative or developmental
  2. Nutritive
  3. Sensory or protective
  4. Defensive or reparative
35
Q

is a thin layer of hard dental tissue covering the anatomic roots of teeth.

A

Cementum

36
Q

It is slightly softer than dentin and consists of about 45% to 50% inorganic material (hydroxyapatite) by weight and 50% to 55% organic matter and water by weight.

A

Cementum

37
Q

It has the highest fluoride content of all mineralized tissue. It is also permeable to a variety of materials and is avascular.

A

Cementum

38
Q

It is a rigid structure that is high elastic modulus, high compressive strength and low tensile strength.

A

Enamel

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