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Zipper slider brings together the two sides of teeth. The popular North American term zipper (UK zip, or occasionally zip-fastener) came from the B. F. Goodrich Company in 1923. The company used Gideon Sundbäck's fastener on a new type of rubber boots (or galoshes) and referred to it as the zipper, and the name stuck. The two chief uses of the ...
The components of a metal zipper include: Zipper teeth. Also known as the chain, it includes the two continuous rows of metal teeth protrusions that are meshed together to close the zipper or separate it. The zipper teeth or chain is measured in terms of chain width gauge size. The bigger the gauge number, the wider the chain width. Slider
The PDL is a part of the periodontium that provides for the attachment of the teeth to the surrounding alveolar bone by way of the cementum. The PDL appears as the periodontal space of 0.4 to 1.5 mm [ citation needed ] on radiographs, a radiolucent area between the radiopaque lamina dura of the alveolar bone proper and the radiopaque cementum.
Coil zipper—also known as nylon coil zipper—is a type of zipper whose teeth/elements are made from coiled monofilament that is traditionally nylon. The coil zipper was first invented in 1940, however not commonly used until the 1960's. [1] [2] The coil is sewn to a zipper tape to make the final product.
The teeth in the upper and lower jaws in mammals have evolved a close-fitting relationship such that they operate together as a unit. "They 'occlude', that is, the chewing surfaces of the teeth are so constructed that the upper and lower teeth are able to fit precisely together, cutting, crushing, grinding or tearing the food caught between." [5]
Tooth fusion is difficult to distinguish from tooth gemination, thus, both conditions are often referred to together as “double teeth”. [1] Double teeth can cause other dental problems such as crowding, ectopic eruption of adjacent teeth, gum issues, cavities, malocclusion, poor esthetics, and more. [1]
Her assailant strangled her nearly unconscious twice. Morgan Metzer: It's the worst feeling in the world to think you're dying. And you feel like you're going to be tortured beforehand.
Ankylosis itself is not a reason to remove a permanent tooth, however teeth which must be removed for other reasons are made significantly more difficult to remove if they are ankylosed. [3] Ankylosis in growing patients can result in infra occlusion of teeth, this can lead to an aesthetic and functional deficit.