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the PDL feels ______
pressure
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what did the PDL start out as?
DENTAL SAC
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the PDL is formed from:
MESODERM!
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what is the fibrous CT that connects the tooth to bone?
PDL
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on a radiograph, the periodontal space appears as a ________ area
radiolucent
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is the periodontal space on a radiograph HEALTHY or UNHEALTHY?
unhealthy :(
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can the PDL detect sensations of pressure, pain, touch, and temperature?
yes!!! the pulp just detects pain
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why is a tooth still able to be felt after a RCT?
it is not, it is just the PDL noting the sensation
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name the 5 components of the PDL
- intercellular substance
- BV's
- nerves
- cells
- fibers
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a component of the PDL that is like all CT
intercellular substance
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what supplies nutrition to the alveolus, cementum, and once those vessels enter the apical foramen, it supplies nutrition to the pulp?
blood vessels
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which are the nerves in the PDL are AFFERENT or EFFERENT?
AFFERENT! sends signals to the brain!
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typical CT (makes fibers) (cells)
fibroblasts
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located along the periphery of alveolar bone, can build/destroy BONE: (cells)
- osteoBLASTS (build)
- osteoCLASTS (destroy)
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located along the periphery of cementum, can build/destroy CEMENTUM: (cells)
- cementoBLASTS
- cementoCLASTS
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cells that started as HERS but got lost, can be cystic
Epithelial Rests of Malassez
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bundles of fibers that connect the bone to the tooth with Sharpeys Fibers:
don't think too hard...it is FIBERS
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name the 2 clinical considerations with the PDL
- occlusal trauma
- perio disease
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if you are clenching/grinding, you are putting extra forces on the perio _______. what clinical consideration does this fall under?
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T/F clenching and grinding lengthens fibers
you know it!
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why does the PDL widen during occlusal trauma?
to be able to withstand forces
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is occlusal trauma seen radiographically?
yes
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the fibers get disorganized and lose their attachment because of the resorption of the bone and cementum:
perio disease! its a nasty habit
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