Who proposed hydrodynamic theory?
The fluid flow mechanism behind hydrodynamic theory was first introduced by Alfred Gysi in 1900, and subsequently developed by Martin Brännström in the 1960s through a series of experimental studies….Hydrodynamic theory (dentistry)
| Hydrodynamic theory | |
|---|---|
| Health | Harmful |
| Stimuli | Thermal (hot and cold), mechanical, osmotic, chemical, electrical |
Is the hydrodynamic theory is most accepted dentin sensitivity theory?
The widely accepted hydrodynamic theory asserts that when the fluid within the dentinal tubules, absent of a smear layer, or enamel or cementum, is subjected to thermal, chemical, tactile or evaporative stimuli, the movement of the fluid stimulates the mechanical receptors which are sensitive to fluid pressure.
What is direct neural stimulation theory?
1) Direct neural stimulation theory: According to this theory the stimuli reaches the nerve endings in the inner dentin. But how it reaches the nerve endings could not be explained. Due to little scientific proof it is not accepted now.
How are Odontoblasts related to the transmission of pain as explained by the hydrodynamic theory?
It was suggested that odontoblasts acted as receptor cells mediating changes in the odontoblasts via synaptic junctions with nerves. This could result in the sensation of pain from the nerve endings located in the pulpodentinal border.
What is hydrodynamic theory of pain?
The theory states that dentine hypersensitivity is caused by movement of the dentinal tubule contents. Various stimuli alter the flow and pressure of the tubule fluid and thus by hydrodynamic action these changes are detected by the mechanoreceptors surrounding the odontoblast processes.
How is dentine hypersensitivity diagnosed?
Dentin hypersensitivity diagnosis can be confirmed by using a dental explorer to check response to tactile stimulus or air blast to check response to cold stimulus.
Why is dentine sensitive?
Dentin is sensitive to stimuli due to the lesion extension of odontoblastic process and formation of dentin-pulp complex [1, 3, 6]. Dentin and pulp are histologically different. However, they have the same embryonic origin; ectomesenchymal origin.
What condition precedes the development of dentinal hypersensitivity?
There are two conditions that precede open or patent tubules: 1) the protective positioning of the gingiva must be altered to expose enamel and/or cementum and 2) enamel or cementum must be lost to expose dentin. Subsequently, if the exposed dentinal tubules remain patent, sensitivity is likely to develop.
What is hydrodynamic theory of dentin?
What is Circumpulpal dentine?
Circumpulpal dentin is formed before the root formation is completed. Newly secreted dentin is unmineralized and is called predentin. It is easily identified in hematoxylin and eosin stained sections since it stains less intensely than dentin. It is usually 10-47μm and lines the innermost region of the dentin.
What is the hydrodynamic theory in dentistry?
The Hydrodynamic or Fluid Movement theory is one of three main theories in dentistry developed to explain dentine hypersensitivity, which is a sharp, transient pain arising from stimuli exposure. It states that different types of stimuli act on exposed dentine, causing increased fluid flow through the dentinal tubules.
What is classical hydrodynamic theory in marine propulsion?
J.S. Carlton FREng, in Marine Propellers and Propulsion (Fourth Edition), 2019 Classical hydrodynamic theory shows that flow about a body can be generated by using the appropriate distributions of sources, sinks, vortices, and dipoles distributed both within and about itself.
What is the role of hydrodynamic theory in the treatment of hypersensitivity?
Brännström’s initial studies on hydrodynamic theory indicate that occlusion of the dentinal tubules reduces the severity of dentine hypersensitivity. This has led to several treatment methods to block or reduce the diameter of the tubules, either mechanically or chemically.
What is classical hydrodynamic theory of flow?
Classical hydrodynamic theory shows that flow about a body can be generated by using the appropriate distributions of sources, sinks, vortices, and dipoles distributed both within and about itself.
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