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Tooth whitening or tooth bleaching is the process of lightening the color of human teeth. [1] Whitening is often desirable when teeth become yellowed over time for a number of reasons, and can be achieved by changing the intrinsic or extrinsic color of the tooth enamel. [2] The chemical degradation of the chromogens within or on the tooth is ...
Cataract surgery is commonly done as an out-patient or day-care procedure, which is less expensive than hospitalisation and an overnight stay, and day surgery has similar medical outcomes. [ 19 ]
Health and appearance of Michael Jackson. Michael Jackson in 1977 at age 18 (left) and 1997 at age 38 (right) Michael Jackson was an American entertainer who spent over four decades in the public eye, first as a child star with the Jackson 5 and later as a solo artist. From the mid-1980s, Jackson's appearance began to change dramatically.
Heart valve replacement involves removing the diseased heart valve. Newer techniques go through the groin. Learn how open heart surgery compares.
A before and after comparison of a double eyelid surgery. This form of cosmetic surgery is also known as the "double eyelid surgery". It is a surgery that reshapes the skin around the eye, resulting in a crease on the upper eyelid. The procedure is popular not just in South Korea but also other Asian countries like Taiwan and India. The double eyelid surgery can be done in several ways, with ...
Photorefractive keratectomy (PRK) and laser-assisted sub-epithelial keratectomy (or laser epithelial keratomileusis[1]) (LASEK) are laser eye surgery procedures intended to correct a person's vision, reducing dependency on glasses or contact lenses. LASEK and PRK permanently change the shape of the anterior central cornea using an excimer laser ...
While many high-profile stars try to hide their plastic surgery, Julie Chen took an alternate approach. The Big Brother host and former member of the Talk has been regularly outspoken about her ...
Critical opalescence. Left-to-right sequence of heating a mass of ethane in a constant volume. In the center panel, critical opalescence is seen. In physics, critical opalescence refers to the dramatic increase in scattering of light in the region of a continuous, or second-order, phase transition. Originally reported by French physicist ...