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OrFac > Periodontium: Parts of the Tooth and its Supporting Structures > Flashcards

Periodontium: Parts of the Tooth and its Supporting Structures Flashcards

1
Q

What does Periodontium mean?

A

Structures that surround, support, and are attached to the teeth.

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2
Q

What are the four tooth tissue? Identify which ones are hard or soft

A

Hard tissue: enamel, dentin, cementum,

Soft tissue: dental pulp

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3
Q

What forms on the outer surface of the atomic crown?

A

Enamel.

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4
Q

What is the thickest over the tip of the crown and thins at the cervical line?

A

Enamel

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5
Q

T/F The colour of enamel varies with its thickness and mineralization.

A

True. The thicker the enamel, the whiter the tooth and increased mineralization causes increased translucency.

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6
Q

What tissue is the hardest in the human body, where its chemical composition is 96% in inorganic matter and 4% organic matter and water?

A

Enamel. This hard surface is resistant to wear from chewing forces and bacteria and acid attack

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7
Q

What dental tissue forms the main body of the tooth and is wrapped in an envelope of enamel on the crown and cementum on the root?

A

Dentin.

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8
Q

What tissue is hard, dense, and calcified, and not as hard as enamel but harder than cementum or bone?

A

Dentin.

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9
Q

What soft tissue is 70% inorganic and 30% organic matter and water?

A

Dentin.

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10
Q

What tissue has the amazing ability to add to itself?

A

Dentin.

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11
Q

What tissue is formed throughout the pulp chamber after eruption?

A

Secondary Dentin.

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12
Q

What tissue is laid down as a protective measure against caries or trauma?

A

Reparative dentin. (tertiary dentin)

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13
Q

What tissue is a bonelike substance that covers the root with a composition is 45-50% inorganic and 50-55% organic matter?

A

Cementum.

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14
Q

Name the tissue that’s function is to provide a medium for the attachment of the tooth to the alveolar bone and this anchor protects the tooth.

A

Cementum.

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15
Q

What tissue is thin at the cervical line and thickens closer to the apex?

A

Cementum.

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16
Q

The union of the enamel and cementum is the ________.

A

CEJ, Cementoenamel junction.

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17
Q

The union of the dentin and cementum is the _________.

A

DEJ, DEntinocemental junction.

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18
Q

What type of cementum covers the apical third of the tooth and can reproduce itself through cells called cementoblasts?

A

Cellular cementum.

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19
Q

What type of cementum covers the entire anatomic root?

A

Acellular cementum.

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20
Q

What tissue is composed of blood vessels, lymph vessels, connective tissue, nerve tissue and dentin-forming cells call odontoblasts?

A

Dental pulp.

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21
Q

What tissue is surrounded by dentin and the walls of the pulp cavity are lined with odontoblasts which form dentin?

A

Dental pulp.

22
Q

The dental pulp is divided into a pulp chamber and pulp canals. Together these are called ______.

A

Pulp cavity.

23
Q

In the pulp cavity the _____ is the coronal portion of the tooth with the most coronal called pulp horns.

A

Pulp chamber.

24
Q

In the pulp cavity, the _______ is located in the roots of the tooth.

A

Pulp canals.

25
Q

What portion of the jaw supports the teeth?

A

Alveolus process (bone).

26
Q

What is the bony socket in which the tooth sits in?

A

Alveolar socket.

27
Q

The _______ _____ is the whole crown of the tooth that is covered by enamel, regardless of whether it is erupted.

A

Anatomical crown.

28
Q

The ______ ______ is the portion of the tooth that is visible in the mouth and may vary because of changes in the position of the gingiva.

A

Clinical crown.

29
Q

The _____ _____ is the portion of the root that is covered with cementum regardless of eruption.

A

Anatomical root.

30
Q

The ____ ____ is the unerupted portion of a tooth. It may be the same as the anatomical root or different depending on eruption and gingival recession or overgrowth.

A

Clinical root.

31
Q

Teeth can have single roots or multiple roots with ________ or _______-roots that are divided into two or three portions respectively.

A

Bifurcations or trifurcations.

32
Q

Each root has an end which is call the _______.

A

Apex.

33
Q

At the root tip or apex there is a small opening called a ______.

A

Foramen.

34
Q

The _____ _____ is dense connective tissue organized into fiber groups that connects the cementum covering the root of the tooth with the aveolar bone of the socket wall.

A

Periodontal Ligaments.

35
Q

Name all the alveolodental groups fibers?

A

Apical group, Oblique group,

Horizontal group, Alveolar Crest group, Interradicular group.

36
Q

What fiber group runs from the apex of the tooth to the adjacent alveolar bone?

A

Apical fiber group.

37
Q

What fiber group resists extraction and forces/occlusal stresses?

A

Apical fiber group.

38
Q

What fiber group run from coronal cementum to the alveolar bone?

A

Oblique fiber group.

39
Q

What fiber group resists occlusal stresses?

A

Oblique fibre group.

40
Q

What fiber group run from cementum to the alveolar crest (horizontally)?

A

Horizontal fiber group.

41
Q

What fiber group resists horizontal/twisting movement?

A

Horizontal fiber group.

42
Q

What fibre group run from cementum apical to alveolar crest of bone?

A

Alveolar crest fiber group.

43
Q

What fiber group resists horizontal movement?

A

Alveolar crest fiber group.

44
Q

What fiber group only is in only on multi-rooted teeth and run from alveolar crest of bone to adjacent cementum between roots only?

A

Interradicular fiber group.

45
Q

What fiber group resist extraction forces/occlusal stresses?

A

Interradicular fiber group.

46
Q

What fibre group run from cementum to the free and attached gingiva and support the gingiva?

A

Gingiva fiber group.

47
Q

What fiber group has circular (circumferential) gingival fibers run around the free gingiva and hold gingiva to tooth?

A

Gingiva fiber groups

48
Q

What fiber group run from cementum of interproximal of one tooth to the cementum of interproximal of adjacent tooth (crosses the alveolar crest of bone)?

A

Transseptal fiber group.

49
Q

What fiber group hold teeth in interproximal contact?

A

Transseptal fiber group.

50
Q

The gingiva is attached to the tooth through collagen fibers formed by _________.

A

Fibroblasts.

51
Q

______ ______ are all fibers that are embedded in cementum and pass out the cementum in small bundles.

A

Sharpeys Fibers.

OrFac (7 decks)

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