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The idea of a tooth worm is a theory of the cause of dental caries, periodontitis and toothaches. Once widespread, the belief is now obsolete, having been superseded by more scientific rationales. It was supposed that the disease was caused by small worms resident within the tooth, eating it away. [1]
The species exist in and have adapted to various ecologies – some in marine environments as distinct as tidal zones and hydrothermal vents, others in fresh water, and yet others in moist terrestrial environments. The Annelids are bilaterally symmetrical, triploblastic, coelomate, invertebrate organisms. They also have parapodia for locomotion.
The water there was in fact a natural underground spring without proper sewage pumping to filter it out from the basement and keep it from going stagnant; as a result, the water had turned to a black sludge-like consistency, and the episode featured multiple shock scenes where the camera focuses in on a large colony of Tubifex worms living there.
"The most common way is there are a number of labs that will send the dentist or patient a kit with preserving liquid to keep the tissue alive," Sears said. "They just send it to a lab and ...
Conodonts (Greek kōnos, "cone", + odont, "tooth") are an extinct group of jawless vertebrates, classified in the class Conodonta.They are primarily known from their hard, mineralised tooth-like structures called "conodont elements" that in life were present in the oral cavity and used to process food.
Researchers looked at rates of tooth decay and hospital admissions for tooth extractions.
Gongylonema pulchrum was first named and presented with its own species by Molin in 1857. The first reported case was in 1850 by Dr. Joseph Leidy, when he identified a worm "obtained from the mouth of a child" from the Philadelphia Academy (however, an earlier case may have been treated in patient Elizabeth Livingstone in the seventeenth century [2]).
Since these organisms are extremely fragile, they are rarely observed alive. [8] Bioluminescence in siphonophores has been thought to have evolved as a defense mechanism. [ 8 ] Siphonophores of the deep-sea genus Erenna (found at depths between 1,600–2,300 metres or 5,200–7,500 feet) are thought to use their bioluminescent capability for ...