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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
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 ...
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 dental arches are the two arches (crescent arrangements) of teeth, one on each jaw, that together constitute the dentition.In humans and many other species, the superior (maxillary or upper) dental arch is a little larger than the inferior (mandibular or lower) arch, so that in the normal condition the teeth in the maxilla (upper jaw) slightly overlap those of the mandible (lower jaw) both ...
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.
In this procedure, a dentist or orthodontist attaches braces to certain teeth (typically the canines and premolars) and inserts wiring, but not elastics, between the upper and lower teeth in a figure-8 pattern. The wiring is removed periodically to allow the jaw joints to move freely, especially in the vertical direction.
Teeth displaying enamel hypoplasia lines, linear defects of enamel that form during crowns development as a result of periods of nutritional stress or disease during infancy and childhood Enamel hypoplasia is a risk factor for dental caries in children including early childhood caries (ECC), which continues to be a burden for many children.
Ota Benga, a famous Congolese pygmy, shows off his sharpened teeth. A man with filed teeth (probably Mentawai) smokes in a photograph by Dutch photographer Christiaan Benjamin Nieuwenhuis who worked in Sumatra. Human tooth sharpening is the practice of manually sharpening the teeth, usually the front incisors. Filed teeth are customary in ...