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A 2013 Cochrane review found no high-quality evidence with respect to the management of the recurrence of lower-front-teeth misalignment following treatment. [8] Clear aligners are more noticeable than lingual braces, but they can be removed, which makes cleaning of the teeth easier, and they are faster for the dentist to apply. [4]
Long-term contact lens use can lead to alterations in corneal thickness, stromal thickness, curvature, corneal sensitivity, cell density, and epithelial oxygen uptake. . Other structural changes may include the formation of epithelial vacuoles and microcysts (containing cellular debris), corneal neovascularization, as well as the emergence of polymegethism in the corneal endoth
They were produced in clear, amber, green, and a high-density dark green for gunnery to facilitate spotting targets against the sun. Lens contractors were American Optical, Bausch & Lomb Optical and Libby-Owens-Ford. Small quantities of clear plastic lenses were produced in response to lenses being shattered by flying debris during combat use.
Unlike traditional water flossers which use a small tip to manually clean between your teeth, the way you would use traditional floss, and are recommended to be used in addition to flossing, the ...
A 1930s poster from the Work Projects Administration promoting oral hygiene. Tooth decay is the most common global disease. [14] Over 80% of cavities occur inside fissures in teeth where brushing cannot reach food left trapped after eating and saliva and fluoride have no access to neutralize acid and remineralize demineralized teeth, unlike easy-to-clean parts of the tooth, where fewer ...
Plastic’s versatility, durability, and low weight-to-strength ratio have made it an efficient material for many of life’s modern conveniences. However, by their nature, plastics can break down ...
Cold weather: Most modern cold-weather goggles have two layers of lens to prevent the interior from becoming "foggy". With only a single lens, the interior water vapor condenses onto the lens because the lens is colder than the vapor, although anti-fog agents can be used. The reasoning behind the dual layer lens is that the inner lens will be ...
Image credits: milwbrewsox #7. My wife and I have this ceiling fan/light in our bedroom in the house we moved into two years ago. It has a remote control for the fan and lights.