What is hydrodynamic mechanism?
The hydrodynamic theory proposes that when dentinal tubules are exposed at the pulp and dentine surface, external stimuli cause changes in fluid flow. This causes shifts in pressure within the dentine, which stimulate the myelinated nerves located in the pulp, causing the sensation of pain.
What are the 3 theories of dentin sensitivity?
Three mechanisms, all involving an understanding of the structure of dentin and pulp, have been proposed to explain dentin sensitivity: (1) The dentin contains nerve endings that respond when it is stimulated, (2) the odontoblasts serve as receptors and are coupled to nerves in the pulp, and (3) the tubular nature of …
Which is the most accepted theory of dentin hypersensitivity?
Brännström’s hydrodynamic theory is currently the most commonly accepted theory of how dentin hypersensitivity arises: Dentin hypersensitivity arises when tubules found within dentin become exposed, most commonly caused by gingival recession or enamel wear.
What is the current theory to explain the concept of dentine hypersensitivity pain?
The theory states that sensitive dentin is based on the stimulus-induced fluid flow in the dentinal tubules and consequent nociceptor activation in the pulp/dentin border area [6].
What are the theories of tooth eruption?
The neuromuscular theory or unification theory of tooth eruption states that the synchronized forces of the orofacial muscles, under the control of the central nervous system, are responsible for the active movements of a tooth and the molecular events prepared a pathway under the control of these forces [68,[70], [71] …
How is dentine hypersensitivity diagnosed?
Useful diagnostic tools are the air/water syringe (thermal), dental explorer (touch), percussion testing, bite stress tests, and other thermal tests such as an ice cube, and assessment of occlusion.
How tooth sensitivity and pain is perceived by the tooth with the hydrodynamic 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 causes sensitivity in the dentin?
Dentin hypersensitivity is among the most frequently reported dental concerns. This condition primarily occurs due to dentin exposure to thermal, chemical or osmotic stimuli, thereby causing extreme sensitivity and pain. The dentin is the part of the tooth structure directly underneath the enamel.
What is hydrodynamic explain its properties?
see mechanics. branch of physics concerned with motion and the forces that tend to cause it; it includes study of the mechanical properties of matter, such as density, elasticity, and viscosity. …..
Who is the founder of the hydrodynamic theory of Dentistry?
Hydrodynamic theory (dentistry) The hydrodynamic theory, first proposed by M. Brännström in 1966, suggested that dentine hypersensitivity is due to the abrupt movement of fluid within the dentinal tubules in response to cold and heat (thermal), osmotic (e.g. eating sugary foods), mechanical (e.g. chewing) and evaporative stimuli (e.g.
How does hydrodynamic theory relate to dentine 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.
How did Dr Brannstrom contribute to the hydrodynamic theory?
Dr.Brännström (1922-2001) was a Swedish dentist, specialising in Oral Pathology and the mechanism of tooth sensitivity. In the 1960s, Brännström provided evidence to support Gysi’s hydrodynamic theory through a series of experimental studies in vitro to show that various stimuli caused shifts in fluid movement across dentine, producing pain.
How are dentin and pulp the same and different?
Dentin and pulp are histologically different. However, they have the same embryonic origin; ectomesenchymal origin. The formation of dentin-pulp causes dentin to be affected by pulp and vice versa. Dentin has very minute tubules which are filled with odontoblastic process.
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