Term
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Definition
-Generally the CT that lies within teeth and provided support for dentin -Contains the nerves and vasculature
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Term
| 3 Zones of Peripheral Denal Pulp |
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Definition
1. Odontoblastic Zone 2. Cell Free (poor) Zone of Weil 3. Cell Rich Zone of Rinnaggio (Oh Dr. O...)
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Term
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Definition
-Single layer of odontoblasts that line pulp -Lie adjacent to predentin, each cell having a single process that rests within a dentinal tubule - Numerous junctions (desmesomes, etc) between odontoblasts with number and location of junction changing according to fucntional states -Odontoblasts are long lived and can't divide |
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Term
| Cell Free/Poor Zone of Weil |
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Definition
-Thin layer immediately subjacent to the odontoblastic zone that contains very few cells -Also occupied by blood vessels, nerve fibers and fine fibers
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Term
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Definition
-3-5 cell layers thick, lies under cell free zone -Composed of flattened stellate or fusiform cells -Mainly fibroblasts and undifferentiated mesenchymal cells
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Term
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Definition
-Within the Cell Free Zone -Contains the Nerve Plexus of Raschkow and the vascular plexus
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Term
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Definition
-Represents the peripheral branches of the nerve that enters through the apical foramen -Only present in the crown -Never bundles are both myelinated and unmyelinated -Comprised of Sensory afferentsof the Trigeminal Nerve and sympathetic branches of Superios Cervical Ganglion
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Term
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Definition
1. A delta fibers - myelinated fast conducting, larger diameter, associated with Sharp pain 2. C fibers - unmyelinated slow condiction, smaller diameter, assiciated with Dull, Diffuse pain. -As approach coronal portion of pulp, myelinated nerved lose myelin sheaths. -Some go up dentinal tubules and play a role in sensitivity -No synapses with nerves and o-blast process |
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Term
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Definition
-Mostly enter and leave pulp via apical foramen -Arterioles enter and branch, supplying subodontoblastic region -During dentinogenesis, arterioles intermingle with odontoblasts -Other vasculature includes venules and lymphatics -The first blood vessels to supply developing tooth Enter at Dental Papilla during the CAP STAGE |
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Term
| Other Cells of Dental Pulp |
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Definition
1. Fibroblasts 2. Undifferentiated Mesenchymal Cells 3. Macrophages 4. Lymphocytes 5. Dendritic Cells
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Term
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Definition
-Most numerous cels of pulp -Common in coronal portion where they are found in the Cell Rich Zone -Provide structural support to pulp, help form its matrix
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Term
| Pulp Undifferentiated Mesenchymal Cells |
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Definition
-Pool of cells that are recruited into Fibroblast or Odontoblasts when needed -Also found in Cell Rich Zone and Core of pulp associated with blood vessels |
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Term
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Definition
-Located toward the pulp core -Ummm, they eat stuff...
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Term
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Definition
-In non-pathologic state, T lymphocytes found throughout pulp but B lymphocytes are rare
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Term
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Definition
-Similar in function to Langerhans cels (as antigen presenting cells) -In unerupted teeth, these cells are associated mainly with odontoblast layer -In erupted teeth, found Below the odontoblast layer -More common than macrophages and proliferate in carious teeth
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Term
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Definition
1. Collagen Fibers - mostly thinker Type I and stain with eosin. The other fine fibers are Type III and stain with silver 2. Ground Substance - primarily glycosaminoglycans, glycoproteins, and water. Functions in support and nutrient and waste transport to and from blood vessels
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Term
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Definition
-Most sensitive to pain in response to thermal change, mechanical contact or dehydration -Function of nerve fibers within inner portion of dentin is not really known -Possibly function in relation to dentinal tubular fluid: Flow of fluid through tubules causes a distortion in pulpal microenvironent -> stimulates free nerve endings in nerve plexus of Raschkow
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Term
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Definition
-Isolated calcified masses within pulp, similarly mineralized like dentin -Can be solitary or multiple, in any tooth -Usually found in plulp chamber orfice or root canal -Form by accretion of mineralized tissue around a nidus of dead cells, collagen of blood thrombi -Can obstruct root canal making endo procedures hard
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Term
| 2 Basic Types of Pulp Stones |
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Definition
1. Attached stone -stone is attached to dentin 2. Free stone - not attached to dentin
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Term
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Definition
1. True - has dentinal tubules running through it 2. False - has NO D tubules 3. Discreet - has well defined clumps of calcium 4. Indiscreet -diffuse and amorphous
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Term
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Definition
-Some are protective, some comromise ability to respond to injury/repair itself 1. Decrease in pulp volume (secondary dentin)
2. Decrease in cellularity 3. Reduction in nerve fibers 4. Dystrophic calcification (pulp stones)
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