Dental component and a dental implant

Abstract

The invention relates to a dental component, such as an abutment, an abutment replica, an abutment blank, a customized abutment, a scan abutment, a digital transfer coping, an impression pick-up element, a healing cap or a driver, comprises a first indexing element and at least two second indexing elements having apical ends located apically of the apical end of said first indexing element. The invention also relates to a dental implant which comprises a dental component having first and second indexing elements and a fixture having third and fourth indexing elements, wherein the first and third indexing elements can only engage with each other after the second and fourth indexing elements have engaged with each other. The invention also relates to a fixture.

1 . A dental component, comprising a fixture engagement portion being provided with
 at least two radially projecting first indexing elements, each having an apical end, wherein the at least two radially projecting first indexing elements include a primary first indexing element and a secondary first indexing element being spaced from one another by a first cylindrical enveloping surface portion therebetween and   at least two radially projecting second indexing elements being interposed between the primary first indexing element and the secondary first indexing element, each one having an apical end located apically of the apical ends of said primary first indexing element and said secondary first indexing element,   wherein the first cylindrical enveloping surface portion is free of additional radially projecting first indexing elements.   
     
     
         2 . The dental component as claimed in  claim 1 , wherein said at least two second indexing elements are asymmetrically distributed along the circumference of the fixture engagement portion. 
     
     
         3 . The dental component as claimed in  claim 1 , wherein said at least two radially projecting first indexing elements and said at least two second indexing elements are asymmetrically distributed along the circumference of the fixture engagement portion. 
     
     
         4 . The dental component as claimed in  claim 1 , wherein said at least two second indexing elements are symmetrically distributed along the circumference of the fixture engagement portion. 
     
     
         5 . The dental component as claimed in  claim 1 , wherein said at least two radially projecting first indexing elements and said at least two second indexing elements are symmetrically distributed along the circumference of the fixture engagement portion. 
     
     
         6 . The dental component as claimed in  claim 1 , wherein the axial extension of the indexing elements is such that the first indexing element and the second indexing elements are intersected by a common geometrical plane which is perpendicular to the central axis of the fixture engagement portion. 
     
     
         7 . The dental component as claimed in  claim 1 , wherein following the circumferential direction of the fixture engagement portion, said at least two second indexing elements are interposed between two of said first indexing elements. 
     
     
         8 . The dental component as claimed in  claim 1 , wherein said at least two radially projecting second indexing elements are arranged as at least three radially projecting second indexing elements, interposed between said at least two first indexing elements, wherein each one of said three second indexing elements has an apical end which is located apically of the apical ends of said at least two first indexing elements. 
     
     
         9 . The dental component as claimed in  claim 1 ,
 wherein a radius from said central axis to the centre of one of said at least two second indexing elements and a radius from said central axis to the centre of said first indexing element form a first angle θ,   wherein a radius from said central axis to another one of said at least two second indexing elements and said radius from said central axis to the centre of said first indexing element form a second angle φ, and   wherein said second angle φ is different from said first angle θ and from any angle being a multiple of said first angle θ, so that φ≠nθ, where n is a positive integer.   
     
     
         10 . The dental component as claimed in  claim 1 , wherein the number of first indexing elements is greater than the number of second indexing elements. 
     
     
         11 . The dental component as claimed in  claim 1 , wherein each one of said second indexing elements has a smaller dimension in the circumferential direction and/or in the radial direction compared to the dimensions of said at least one first indexing element. 
     
     
         12 . The dental component as claimed in  claim 1 , wherein said at least one first indexing element and said at least two second indexing elements have elongate extensions in the coronal-apical direction. 
     
     
         13 . The dental component as claimed in  claim 1 , wherein said at least two first indexing element and said at least two second indexing elements project radially from the first cylindrical surface portion of the fixture engagement portion. 
     
     
         14 . The dental component as claimed in  claim 1 , wherein the apical end of at least one of said at least two second indexing elements is provided with a chamfer. 
     
     
         15 . The dental component as claimed in  claim 1 , being a component selected from the group consisting of an abutment, an abutment replica, an abutment blank, a customized abutment, a scan abutment, a digital transfer coping, an impression pick-up element, a healing cap and a driver. 
     
     
         16 . A dental implant, comprising
 a dental component comprising a fixture engagement portion provided with
 at least two radially projecting first indexing elements, each having an apical end, wherein the at least two radially projecting first indexing elements include a primary first indexing element and a secondary first indexing element being spaced from one another by a first cylindrical enveloping surface portion therebetween, and 
 at least two radially projecting second indexing elements being circumferentially spaced from one another and interposed circumferentially in the first groove cylindrical enveloping surface portion and between the primary first indexing element and the secondary first indexing element, each one of the second indexing elements having an apical end located further apically relative to the apical ends of the primary first indexing element and the secondary first indexing element, wherein the first cylindrical enveloping surface portion is free of additional radially projecting first indexing elements, 
   a dental fixture adapted to be inserted into a jawbone and comprising a component engagement portion adapted to mate with said fixture engagement portion, the component engagement portion being provided with
 at least two third indexing elements, each one having a coronal end, and 
 at least two fourth indexing elements, each one having a coronal end, 
   wherein the apical ends of said at least two second indexing element are located apically of the apical end of the at least two first indexing element and/or the coronal ends of said at least two fourth indexing elements are located coronally of the coronal end of the at least two third indexing elements,   wherein the first, second, third and fourth indexing elements are distributed along the circumference of the fixture engagement portion and the component engagement portion, respectively, in such way that the dental component can only mate in one rotational orientation with respect to the dental fixture, and   wherein the at least two first indexing elements are only enabled to mate with the at least two third indexing elements after said at least two second indexing elements have mated with said at least two fourth indexing elements.   
     
     
         17 . The dental implant as claimed in  claim 16 , wherein a play between the at least two first indexing elements and the mating at least two third indexing elements is smaller than a play between said at least two second indexing elements and said at least two mating fourth indexing elements, whereby a tighter fit is provided between the at least two first and at least two third indexing elements compared to the fit between the second and fourth indexing elements. 
     
     
         18 . The dental implant as claimed in  claim 16 , wherein said first and second indexing elements are provided as radial projections which project from a surface of the fixture engagement portion of the dental component, and wherein said third and fourth indexing elements are provided as radial depressions in a surface of the component engagement portion of the dental fixture. 
     
     
         19 . The dental implant as claimed in  claim 16 , wherein said at least two second indexing elements are symmetrically distributed along the circumference of the fixture engagement portion, and wherein said at least two fourth indexing elements are symmetrically distributed along the circumference of the component engagement portion. 
     
     
         20 . The dental implant as claimed in  claim 16 , wherein said at least two second indexing elements are asymmetrically distributed along the circumference of the fixture engagement portion, and wherein said at least two fourth indexing elements are asymmetrically distributed along the circumference of the component engagement portion. 
     
     
         21 . The dental implant as claimed in  claim 16 ,
 wherein a radius from a central axis of the fixture engagement portion to the centre of one of said at least two second indexing elements and a radius from said central axis to the centre of one of said at least two first indexing elements form a first angle θ,   wherein a radius from said central axis to another one of said at least two second indexing elements and said radius from said central axis to the centre of one of said at least two first indexing element form a second angle φ, and   wherein said second angle φ is different from said first angle θ and from any angle being a multiple of said first angle θ, so that φ≠nθ, where n is a positive integer.   
     
     
         22 . The dental implant as claimed in  claim 16 , wherein the fixture engagement portion and the first and second indexing elements of the dental component are rotatable inside the component engagement portion of the fixture before the second indexing elements have mated the fourth indexing elements. 
     
     
         23 . A dental fixture comprising a component engagement portion being provided with
 at least two first radially projecting or indenting indexing element having a coronal end, wherein the at least two radially projecting or indenting first indexing elements include a primary first indexing element and a secondary first indexing element being spaced from one another by a first cylindrical enveloping surface portion therebetween, and   at least two second radially projecting or indenting indexing elements being interposed between the primary first indexing element and the secondary first indexing element, each one having a coronal end which is located coronally of the coronal end of the primary first indexing element and the secondary first indexing element,   wherein the first cylindrical enveloping surface portion is free of additional radially projecting first indexing elements.   
     
     
         24 . The dental fixture of  claim 23 , wherein the dental fixture is adapted to be inserted into a jawbone. 
     
     
         25 . The dental component as claimed in  claim 23 , wherein said at least two second indexing elements are asymmetrically distributed along the circumference of the component engagement portion. 
     
     
         26 . The dental component as claimed in  claim 23 , wherein said at least two first indexing elements and said at least two second indexing elements are asymmetrically distributed along the circumference of the component engagement portion. 
     
     
         27 . The dental component as claimed in  claim 23 , wherein said at least two second indexing elements are symmetrically distributed along the circumference of the component engagement portion. 
     
     
         28 . The dental component as claimed in  claim 23 , wherein said at least two first indexing elements and said at least two second indexing elements are symmetrically distributed along the circumference of the component engagement portion.