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ORAL BIOLOGY > STUDY > Flashcards

STUDY Flashcards

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1
Q

Mantle dentine

A

first dentin to produced and calcified

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2
Q

Interglobular dentin

A

hypomineralised dentin and globular areas mineralisation failed to fuse

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3
Q

Secondary dentin

A

formed after tooth and root are completely formed, formed throughout life

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4
Q

Tertiary dentin

A

formed due to stimulus (to protect pulp from caries)

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5
Q

Enamel tufts

A

BRUSH LIKE areas of hypocalcified enamel rods @ DEJ

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6
Q

Lamellae

A

hypocalcified CRACKS in enamel, extends from DEJ to surface

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7
Q

Enamel spindle

A

short ODONTOBLASTIC PROCESSES extend from dentin to enamel

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8
Q

Dentogingival junction tissues

A

sulcular & junctional epithelium

sulcular- away from tooth, gingival sulcus
junctional- deeper of sulcular, collar around tooth, floor of gingival sulcus

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9
Q

Gingival sulcus

A

space filled with gingival fluid, 0.5-3mm, average 1.8mm

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10
Q

Gingival fiber group 4

A

dentogingival
dentoperiosteal
alveologingival
circular

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11
Q

Finers to keep tooth intact

A

transeptal
circular

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12
Q

Soft palate

A

lining mucosa
thin non keratinised
thick lamina propria
submucosa: thin & firmly attached to muscles, adipose tissue, no minor s.g.

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13
Q

Hard palate

A

masticatory mucosa
thick orthokeratinised
thick lamina propria
submucosa: thinner > soft palate, adipose tissue @ anterior of lateral portion, minor s.g. @ molar area

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14
Q

FDI system

A

international system
2 digits
australia
first digit- arch
second digit- tooth

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15
Q

Mantle dentin

A

first predentin to form and mature
outer layer closest to enamel
mineralised collagen fibers direction differ from others
perpendicular direction to DEJ
more peritubular dentin

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16
Q

Physical characteristics of cementum

A

light yellow, lighter > dentin
acellular cementum (20-50micrometer)
cellular cementum (150-200micrometer)
< hard than dentin
> permeable than dentin
cellular cementum permeable > acellular

17
Q

Acellular cementum

A

primary cementum (first layer)
slow rate formation
more calcified
no cementocytes
one layer covers all root
many layers @ cervical 1/3 CEJ
width maintained
Sharpey’s fibers make up amd fully mineralised

18
Q

Cellular cementum

A

secondary cementum
after acellular cementum
faster rate formation
less calcified
many embedded cementocytes
over acellular cementum @ apical 1/3 of root
cementoblast to produce more cellular layer
width can change
Sharpey’s fiber partially mineralised @ periphery

19
Q

Intermediate cementum

A

Hyaline layer of Hopewell Smith
poorly defined zone @ CDJ
thin, amorphous layer of hard tissues
apical 2/3 of roots of posterior teeth
cellular remnants of Hertwig’s

ORAL BIOLOGY (3 decks)

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