Abstract:
A curing light may include a housing sized and configured for placement over a tooth. A first facet positioned within the housing may have a first LED mounted thereon, a second facet positioned within the housing may have a second LED mounted thereon, and a third facet positioned within the housing may have a third LED mounted thereon.

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
       [0001]    This continuation application claims the benefit of and priority to U.S. patent application Ser. No. 12/776,695 titled THREE DIMENSIONAL CURING LIGHT filed on May 10, 2010 which is a continuation application of U.S. patent application Ser. No. 11/445,498 filed on Jun. 1, 2006 which claims priority to U.S. Provisional Patent Application Ser. No. 60/686,261 filed on Jun. 1, 2005. The content of each of the aforementioned applications is incorporated herein by reference in their entirety. 
     
    
     TECHNICAL FIELD OF THE INVENTION 
       [0002]    The present invention relates to the field of curing lights and, more particularly, to the field of three-dimensional curing lights. 
       BACKGROUND OF THE INVENTION 
       [0003]    Although teeth have a 3-dimensional shape, prior art dental curing lights all emit light that can only be applied to one side of a tooth at a time. Exposing the entire tooth to light emitted by a curing light uses up valuable dentist chair time. 
       SUMMARY OF THE INVENTION 
       [0004]    A 3-dimensional curing light is disclosed. 
     
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         [0005]      FIG. 1  depicts an example 3-dimensional curing light. 
           [0006]      FIG. 2  depicts a cross-sectional view of an example 3-dimensional curing light. 
           [0007]      FIG. 3  depicts another cross-sectional view of an example 3-dimensional curing light. 
       
    
    
     DETAILED DESCRIPTION OF THE INVENTION 
       [0008]    Three dimensional curing lights are disclosed that can emit light for polymerizing monomers into polymers from  3  sides of a tooth at the same time. This approach can also be used to enhance the properties of the cured dental composite, and to achieve a deeper cure. 
         [0009]      FIG. 1  depicts a perspective view of a 3-dimensional curing light. A control box  101  controls operation of the light. It includes a display  102 , control buttons  103 ,  104 , and  105  for controlling power, curing mode, and light emitting selections respectively. An electrical cord  106  is attached to the control box  101  to provide electrical power from an AC outlet. A cable  107  transfers electrical power from the control box to a 3-dimensional curing light head  108 . The 3D curing light head has 3 facets,  109 ,  110 , and  111 . The 3 facets form a 3-dimensional channel Inside the channel, the light is emitted from the inside of the facets. The light beams  112 ,  113 , and  114  from each facet combine to cover the 3-dimensional space occupied by a tooth. Thus any three dimensional object inside the channel can be cured at once. The light emitted from the 3 facets can be controlled to be emitted together or individually depending on the need. 
         [0010]      FIG. 2  depicts a cross-sectional view of a 3-dimensional curing light head using LEDs as a light source. In the light head, there are 3 facets,  201 ,  202 , and  203 . Each facet has a similar structure and they are oriented at about 90 degrees to each other. The facets form a channel therebetween into which an object to be cured is placed. Each facet contains an LED light source  204 . The LED light source can be a single LED, multiple LEDs, LED arrays, and combinations of different LEDs. The wavelength of the LEDs can range from less than 280 nm to more than 5000 nm depending on application. The power of the LEDs can range from less than 50 to more than 3000 mW/cm2. The LED light source is attached to a heat sink  205  using a fixture  206  with screw  207 . There is heat conduction paste  208  located between LED  204  and heat sink  205  to facilitate heat transfer. There is a heat insulation layer  209  within the head housing to create an air gap between the heat sink and the outside casing so that the heat will not conducted to the outside casing. On the light-emitting side of the LEDs, there is a protection cover  210  to cover the LEDs and protect them from damage and contaminants The cover  210  can be a simple protection cover, or an optical lens to shape or focus a light beam. The LED light source can contain its own heat sink so that heat sink  205  serves as a secondary heat sink for greater heat dissipation. Instead of an LED light source, a semiconductor laser or any other desired light source could be used. 
         [0011]      FIG. 3  depicts the curing of a tooth filling using a 3-dimensional curing light. A light head  301  is on top of a tooth structure  302  with a filling  303  in the tooth. Three LEDs on 3 facets emit light beams  304 ,  305 , and  306  from three sides. This allows the  3  light beams to reach the filling material from  3  directions to cure it into a durable dental restoration. Even though the light beams  305  and  306  need to penetrate the tooth structure to reach the filling material, the resulting dental restoration will be stronger and more durable than a restoration cured from one side only. 
         [0012]    While the present invention has been described and illustrated in conjunction with a number of specific embodiments, those skilled in the art will appreciate that variations and modifications may be made without departing from the principles of the invention as herein illustrated, described, and claimed. The present invention may be embodied in other specific forms without departing from its spirit or essential characteristics. The described embodiments are to be considered in all respects as only illustrative, and not restrictive. All changes which come within the meaning and range of equivalency of the claims are to be embraced within their scope.