Orthodontic device
An orthodontic retainer for stabilization of plurality of teeth is provided, which includes at least one first textured group of layer(s) for improving adhesiveness which contacts inner surfaces of teeth, at least one second textured group of layer(s) for preventing biofilm entities which is positioned at interdental places of teeth, wherein the orthodontic retainer is formed in one piece.
1 . An orthodontic retainer for stabilization of a plurality of teeth comprising:
at least one first region having a first surface with a contact angle of between 0° and 90° when measured with water or oil, said at least one first region being located on a top side and/or a bottom side of the orthodontic retainer and/or located on a tooth side and/or on a tongue side of the orthodontic retainer,
at least one second region having a second surface with a contact angle greater than 90° when measured with the water or the oil, said at least one second region being located on a top side and/or a bottom side of the orthodontic retainer and/or located on a tooth side and/or on a tongue side of the orthodontic retainer;
wherein the orthodontic retainer is integrally formed in one piece,
the at least one first region and the at least one second region have different types of surface roughness parameters from each other,
wherein the at least one first region is at least one first textured group of layers for improving adhesiveness of the retainer when contacting with contact surfaces of teeth, and the at least one second region is at least one second textured group of layers for placing on interdental places and is configured to prevent biofilm entities.
2 . The orthodontic retainer according to claim 1 , wherein the orthodontic retainer is made of nickel-titanium alloy, titanium alloy, beta titanium alloy, gold alloy, silver alloy, a shape memory alloy or a superelastic alloy.
3 . The orthodontic retainer according to claim 2 , wherein the contact angle of the first surface is between 0° and 10° when measured with the water or the oil, and wherein the contact angle of the second surface is between 90° and 150° when measured with the water or the oil.
4 . The orthodontic retainer according to claim 2 , wherein the contact angle of the first surface is between 0° and 10° when measured with the water or the oil, and wherein the contact angle of the second surface is between 90° and 150° when measured with the water or the oil,
wherein the orthodontic retainer is formed in one piece and consists of a shape memory type or superelastic type-alloy.
5 . The orthodontic retainer according to claim 1 , wherein the contact angle of the first surface is between 0° and 10° when measured with the water or the oil, and wherein the contact angle of the second surface is between 90° and 150° when measured with the water or the oil.
6 . The orthodontic retainer according to claim 1 , wherein the contact angle of the first surface is between 0° and 10° when measured with the water or the oil, and wherein the contact angle of the second surface is between 90° and 150° when measured with the water or the oil,
wherein the orthodontic retainer consists of a shape memory type or superelastic type alloy.
7 . The orthodontic retainer according to claim 1 , wherein the at least one first textured group of layers has a surface roughness profile formed by dimples, notches or protrusions, and the surface roughness profile is defined by:
an arithmetical mean roughness value (R a ) ranging from 12.5 to 35.0 μm, and
a mean roughness depth value (R z ) ranging from 50.0 to 200.0 μm.
8 . The orthodontic retainer according to claim 1 , wherein the at least one second textured group of layers has a surface roughness profile as defined by:
an arithmetical mean roughness value (R a ) ranging from 0.012 to 8 μm, and
a mean roughness depth value (R z ) ranging from 0.40 to 50 μm.
9 . The orthodontic retainer according to claim 1 , wherein the orthodontic retainer is embeddable in a composite resin, and a perpendicular distance between a closest tooth surface and a closest orthodontic retainer surface on a tooth side is a maximum of 0.10 mm.
10 . The orthodontic retainer according to claim 1 , wherein the at least one second textured group of layers without composite resin correspond to interdental places, and a perpendicular distance between a closest tooth surface and a closest orthodontic retainer surface on a tooth side is between 0.10 mm-0.40 mm.
11 . The orthodontic retainer according to claim 1 , wherein the orthodontic retainer has a cross-sectional height, a cross-section in a shape of a quadrilateral, with edge lengths of the cross-section amounting to a maximum of 0.55 mm, and a minimum of 0.35 mm.
12 . The orthodontic retainer according to claim 1 , wherein the at least one first textured group of layers has a surface roughness profile formed by dimples, notches or protrusions, and wherein the dimples, the notches or the protrusions form a repeating texture having a circular, rectangular, zigzag, triangular, transversally rectangular or honeycomb shape.
13 . The orthodontic retainer according to claim 1 , wherein the at least one first textured group of layers and/or the at least one second textured group of layers are treated by a laser texturing or electro anodizing or electropolishing or acid treatment.
14 . A method for producing the orthodontic retainer according to claim 1 , comprising steps of:
providing a metal sheet to form a retainer material in a wire shape, cutting the metal sheet held by a fixture holder with a laser or a wire EDM; or providing a straight wire to bend the retainer material by using a CNC wire bending machine with the fixture holder,
obtaining the at least one first textured group of layers and the at least one second textured group of layers with the fixture holder by laser texturing,
wherein the at least one first textured group of layers and the at least one second textured group of layers are separated from each other with the different types of surface roughness parameters.
15 . The method for producing the orthodontic retainer according to claim 14 , further comprising:
forming the at least one first textured group of layers and the at least one second textured group of layers located longitudinally between the at least one first textured group of layers.
16 . The method for producing the orthodontic retainer according to claim 14 , wherein the metal sheet is made of nitinol or beta titanium or superelastic alloy or shape memory alloy.
17 . The orthodontic retainer according to claim 1 , wherein the contact angle of the first surface is between 0° and 10° when measured with the water or the oil, and wherein the contact angle of the second surface is between 90° and 150° when measured with the water or the oil,
wherein the orthodontic retainer consists of a shape memory type or superelastic type alloy.