Dentistry – Orthodontics – Means to transmit or apply force to tooth
Patent
1999-04-20
2000-05-02
Lewis, Ralph A.
Dentistry
Orthodontics
Means to transmit or apply force to tooth
433 8, A61C 300
Patent
active
060565454
ABSTRACT:
Orthodontic appliance is made from mesoporous metals are substantially transparent or at least translucent so that they present a cosmetic appearance having a color the same as or similar to the natural dental services to which the appliance is applied. The archwires and brackets of the orthodontic appliance are fabricated from mesoporous metal and metal alloys, which have defined therein pores the diameter less than the shortest wavelength of visible light incident on the appliance and with a density of pores such that the average index of a fraction of the mesoporous metal is closer to that of air than to the solid metal from which the dental appliance is fabricated. The small size of the pores means that the dental appliance is a poor scatterer of light while the high density of pores means that the optical properties of the mesoporous metal on the average tend to match those of air as opposed to the solid metal, thus making the mesoporous metal transparent or at the very least translucent. Nevertheless, the mesoporous metal in the form of brackets and archwire is still able to carry high tensile loads as may be required to apply corrective forces to maloccluded teeth within an orthodontic appliance.
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The Exonomist, Mar., 1999, Science and Technology, "Through a Metal, Darkly" pp. 95-97.
Dawes Daniel L.
Lewis Ralph A.
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