Patent Publication Number: US-2021186661-A1

Title: Orthodontic traction device

Description:
BACKGROUND OF THE INVENTION 
     (a) Technical Field of the Invention 
     The present invention is generally related to orthodontics, and more particular to a dual-function orthodontic fraction device. 
     (b) Description of the Prior Art 
     Teeth is like a person&#39;s façade. A set of crooked teeth usually leads to a bad first impression. Therefore, modern people are quite concerned about how their teeth look. 
     Dental braces (also known as braces) are commonly used to align and straighten teeth. Usually a flexible arch wire is bended and twisted, and then joined to a number of brackets. The brackets are then attached to a patient&#39;s teeth, which, under the pressure of the arch wire, are directed to their desired positions. However, if the crookedness of the teeth is too great to be adjusted through a conventional brace, an elastic band is usually applied and attached to tiny hooks on traditional brackets. 
     These hooks have a number of shortcomings. For example, they are single-purposed; and they can only work with elastic bands to twist or draw teeth closer laterally. They cannot force teeth to shift upward or downward. 
     SUMMARY OF THE INVENTION 
     A major object of the present invention is to provide a traction device that, through a linear section and a hook member, exerts a rotational force to a tooth, and that, through a channel allowing an arch wire to pass through, exerts a vertical pull on the tooth, thereby achieving a comprehensive orthodontic effect. 
     To achieve the object, the orthodontic traction device includes a base member having an attachment face on a back side of the base member for attaching to a front side of a tooth, a column member joined to a front side of the base member opposite to the attachment face, and a hook member. The column member includes a knee section whose first end is connected to the front side of the base member, and a linear section connected to and extended from a second end of the knee section. A channel runs through the knee section, and the hook member connected to the linear section. 
     The base member is attached to a front side of a crooked tooth by applying adhesive between the attachment face and the tooth. Then, an elastic element is run around the hook member. As the linear section provides a distance between the hook member and the base member, the force exerted by the elastic element is applied in the form of a torque using the linear section as a lever. The tooth is as such turned toward a desired orientation. An arch wire may run through the channel. Through a pull by the arch wire, the tooth may be moved up or down perpendicular to the arch wire so as to adjust its vertical position. As such, the present invention they not only can turn crooked teeth, but also can force teeth to shift upward or downward, achieving a comprehensive orthodontic effect. 
     The foregoing objectives and summary provide only a brief introduction to the present invention. To fully appreciate these and other objects of the present invention as well as the invention itself, all of which will become apparent to those skilled in the art, the following detailed description of the invention and the claims should be read in conjunction with the accompanying drawings. Throughout the specification and drawings identical reference numerals refer to identical or similar parts. 
     Many other advantages and features of the present invention will become manifest to those versed in the art upon making reference to the detailed description and the accompanying sheets of drawings in which a preferred structural embodiment incorporating the principles of the present invention is shown by way of illustrative example. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a perspective diagram showing a traction device according to a first embodiment of the present invention. 
         FIG. 2  is another perspective diagram showing the traction device of  FIG. 1 . 
         FIG. 3  is a block diagram showing the traction device of  FIG. 1 . 
         FIG. 4  is a perspective and enlarged diagram showing how the traction device of  FIG. 1  is applied to a tooth. 
         FIG. 5  is a perspective and enlarged diagram showing how an elastic element is applied to the traction device of  FIG. 1 . 
         FIG. 6  is a perspective and enlarged diagram showing how a tooth is adjusted by the traction device of  FIG. 1 . 
         FIG. 7  is a perspective showing how an arch wire is applied to the traction device of  FIG. 1 . 
         FIG. 8  is a perspective showing how force is exerted by the arch wire of  FIG. 8 . 
         FIG. 9  is a perspective diagram showing a traction device according to a second embodiment of the present invention. 
         FIG. 10  is a perspective and enlarged diagram showing the traction device of  FIG. 9  at work. 
         FIG. 11  is a perspective diagram showing a traction device according to a third embodiment of the present invention. 
         FIG. 12  is a perspective and enlarged diagram showing the traction device of  FIG. 11  at work. 
     
    
    
     DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS 
     The following descriptions are exemplary embodiments only, and are not intended to limit the scope, applicability or configuration of the invention in any way. Rather, the following description provides a convenient illustration for implementing exemplary embodiments of the invention. Various changes to the described embodiments may be made in the function and arrangement of the elements described without departing from the scope of the invention as set forth in the appended claims. 
     As shown in  FIGS. 1 to 3 , a traction device according to a first embodiment of the present invention includes the following components. 
     A base member  1  is made of a ceramic, plastic, or metallic material. 
     The base member  1  has an attachment face  11  on a back side of the base member  1  for attaching to a front side of a tooth through adhesive. 
     A column member  2  is joined to a front side of the base member  1  opposite to the attachment face  11 . The column member  2  includes a L-shaped knee section  21  whose first end is joined to front side of the base member  1 , and a linear section  22  connected to and extended from a second end of the knee section  21 . The linear section  22  is therefore parallel to the front side of the base member  1 . 
     A through channel  23  runs through the knee section  21  and is perpendicular to the linear section  22  and parallel to the front side of the base member  1 . 
     A hook member  3  is connected to the linear section  22 . The hook member  3  may have different shapes but, in the present embodiment, the hook member  3  includes a C-shaped curved section  31  whose one end is connected to the an end of the linear section  22 , and a space  32  surrounded by the curved section  31 . 
     The application of the present embodiment is as follows. 
     As shown in  FIGS. 1 to 8 , the base member  1  is attached to a front side of a crooked tooth by applying adhesive between the attachment face  11  and the tooth. Then, an elastic element  4  is run around the curved section  31  of the hook member  3  through the space  32 . In the present embodiment, the elastic element  4  is an elastic band. As the linear section  22  provides a distance between the hook member  3  and the base member  1 , the force exerted by the elastic element  4  is applied to the tooth through the hook member  3 , column member  2 , and base member  1  to drive the tooth to a desired location. In addition, the force exerted by the elastic element  4  is applied in the form of a torque using the linear section  22  as a lever. The tooth is as such turned toward a desired orientation. 
     Furthermore, an arch wire  5  may run through the channel  23  and the arch wire  5  has its two ends tied to brackets, other traction devices, temporary anchorage devices, or other devices. Through the pull by the arch wire  5 , the tooth may be moved up or down perpendicular to the arch wire so as to adjust its vertical position. Then, a comprehensive orthodontic effect is achieved from the traction device through its linear section  22 , hook member  3 , and channel  23 . 
     As shown in  FIGS. 9 and 10 , a second embodiment of the present invention is similar to the previous embodiment, except that a grid  111   a  is provided along the attachment face  11   a  for enhancing the attachment face  11   a &#39;s friction and attachment to the tooth. 
     Furthermore, in the present embodiment, the hook member  3   a  now includes a first beam  33   a  and a second beam  34   a , extended toward opposite directions perpendicularly from a top end of the linear section of the column member  2   a . As such, the elastic element  4   a  may be selectively applied to either the first beam  33   a  or the second beam  34   a  without turning the hook member  3   a . The convenience of the traction device is as such significantly enhanced. The present embodiment also demonstrates that the hook member  3   a  may be implemented in various ways. 
     As shown in  FIGS. 11 and 12 , a third embodiment of the present invention is also similar to the previous embodiments, except that the base member  1   b  has a number of through holes  12   b  running from the front side to the back side of the base member  1   b  so that, when the base member  1   b  is adhered to the tooth, adhesive may be overflown through the through holes  12   b  onto the base member  1   b , thereby achieving enhanced adhesion. 
     In addition, the hook member  3   b  of the present embodiment includes a beam  35   b , a stopper  36   b , and a limiter  38   b . The beam  35   b  has an end connected to the column member  2   b  at a preset angle so that the beam  35   b  is extended from the column member  2   b  toward a different direction. The stopper  36   b  is provided on another end of the beam  35   b . The stopper  36   b  has a back side  37   b  and a front side  39   b  respectively formed adjacent to the beam  35   b  and opposite to the beam  35   b . The limiter  38   b  is extended from a top end of the linear section and substantially parallel to the beam  35   b . The elastic element  4   b  is applied by moving over the front side  39   b  onto the stopper  36   b  between the back side  37   b  and beam  35   b . The limiter  38   b  further prevents the elastic element  4   b  from escape. Therefore, there is no need to adjust the direction of the hook member  3   b , and the front side  39   b  assists the elastic element  4   b  in looping around the hook member  3   b , thereby achieving greater convenience. The present embodiment also demonstrates that the hook member  3   b  may be implemented in various ways. 
     Therefore, the gist of the present invention lies in the follows. 
     The traction device, through the linear section  22  and the hook member  3  to exert a rotational force while the channel  23  allowing an arch wire to exert vertical pull, achieves a comprehensive orthodontic effect. 
     While certain novel features of this invention have been shown and described and are pointed out in the annexed claim, it is not intended to be limited to the details above, since it will be understood that various omissions, modifications, substitutions and changes in the forms and details of the device illustrated and in its operation can be made by those skilled in the art without departing in any way from the claims of the present invention.