Patent ID: 7927097

Claim:
A bracket for its use in orthodontics, the bracket comprising: a retention bracket base ( 1 ) comprising: bracket base grooves ( 6 ) having a top, a bottom, a depth, and a width; and supporting strips ( 5 ) having a width, wherein the width of said bracket base grooves ( 6 ) is smaller than the width of said supporting strips ( 5 ); a body ( 2 ), wherein said body comprises an arch wire slot ( 3 ) having a top, a base, and sides and wings for ligatures ( 4 , 4 ′) having a top, a bottom, and sides, wherein the bracket is made from polycarbonate, polysulfone, or polyethersulfone; an injection spot located in the center of the retention bracket base; wherein the bracket is entirely made of plastic by an injection molding process; wherein the body has: an occlusal-gingival length (I 1 ) which ranges from 3.3 mm to 4.5 mm; a mesial-distal length (I 2 ) which ranges from 2.8 mm to 3.6 mm; a distance (I 3 ) from the bottom of the bracket base groove ( 6 ) to the base of the arch wire slot which ranges from 0.9 mm to 2.0 mm; and a distance (I 4 ) from the an intersection of lateral and bottom sides of the body to a surface of the arch wire slot of the ligature which ranges from 0.7 mm to 2.0 mm; wherein the bracket base grooves ( 6 ) comprises two lateral walls ( 17 ) and a posterior-wall ( 9 ), wherein said lateral walls ( 17 ) are defined by an external curvature radius (r 1 ), an internal curvature radius (r 2 ) and a gap distance between centers (d), wherein the posterior wall ( 9 ) has a concave form with an inner curvature radius; wherein said supporting strips ( 5 ) comprises the lateral walls ( 17 ) and an anterior wall ( 10 ), wherein said anterior wall ( 10 ) has a concave form with an external curvature radius; and wherein the radius of curvature of the anterior wall is greater than the radius of curvature of the posterior wall.