MX2009008809A - Process for obtaining a bioactive follicular surface in a metallic surgical implant for articular or dental applications. - Google Patents

Abstract

The present invention generates sub-surface follicles connected to a surface by a novel model method which is useful as a negative for the liquid metal introduced into a mould. Once the liquid metal is solidified, an implant is obtained, this latter element having a rich surface for the distribution of follicles in which a treatment with a gel solution of bioactive glass or hydroxyapatite is performed. The result is a metallic surface with follicles coated with a layer of bioactive glass or hydroxyapatite. Consequently, a bone growth is generated in the surface of the implant with an anatomic fixing of the follicle (like the human hair) better than those generated by rough or textured surfaces, also generating a biological fixing promoted by the biological reaction between the bio-glass or hydroxyapatite and the growing bone.

Description

OR OBTAINING A FOLICULAR SURFACE B \ OR METALLIC SURGICAL METALLIC FOR AR OR DENTAL APPLICATIONS.

DESCRIPTION OF THE INVENTION and invention relates to a novel process which produces a surface metal surgical implants obtained by the fusion process and v lost wax casting. This process improves the morphological characteristics of the implants, as well as the aesthetics and performance, since its metal t and a bioactive ceramic formula promotes growth of the bone, improving the bone-integration of the implant and therefore the fixation. This plear to manufacture endo-prosthesis that require bone-integrated into a bone as is the case of joint and dental prostheses.

DENTS , cutting with water or laser machining in which the bone grows inside generating a satisfactory mechanical anchorage. and invention presents a process to generate sub-superficial follicles med a novelty of mold, which serves as a negative for the liquid metal that enters the liquid metal solidifies, an implant with a rich surface d is obtained in which a treatment is performed with a solution gel of a glass bio s obtaining a metal surface with follicles covered with a layer When this is done, a bone growth will be generated on the surface of the implant with u of the follicle (similar to human hair), better than those generated by texturing and that will also generate a biological fixation promoted by the glass and the growing bone.

ESCRIPTION OF THE FIGURES 1 shows a drawing of the surface of the mold to obtain patterns.

DETAILED DISCLOSURE OF THE INVENTION to continue to obtain an active follicular surface, is repressed and described below; ER THE PATTERN WITH FOLICULAR SURFACE a pattern (1) in wax or in polystyrene or other similar material with a mold (2). In order to print the semi-spherical follicles in the egrar areas of the pattern (1) of wax or polystyrene, the mold (2) must have an active follicle (Figure # 1). That surface of the mold (2) can be obtained conventionally, laser, electro-eroded, injection of water under pressure, adhesi elastomer, among others.

THE TREE OF COLADA The pattern in wax or polystyrene of the prosthesis has been formed with the proceeds to assemble it (Figure # 2) in a casting feed system (casting tree) previously designed by means of finite element methods or finite differences. .

After the mud is removed, the surface of the tree is homogeneously wetted. Immediately after having wetted and drained the tree, proceed with thin refractory sand by means of rain or fluid bed method, let it dry for four to eight hours, and repeat the wetting steps, to obtain a ceramic thickness enough to withstand the metal pressure during the emptying of liquid metal in subsequent steps. covered with ceramics the tree in wax or in polystyrene, it proceeds to evacuate prepared in wax. For this action an autoclave can be used.

RIZATION, PRE-HEATED OF CERAMIC MOLD AND DRAINED D It is then proceeded to sinter and preheat the mold at a temperature of between three hours. In parallel, the metal alloy biocompatibl V, 316LS or Ta melts at its melting temperatures. Once these two are ready, pour the alloy into the ceramic mold. Subsequently, the surface is damaged or damaged and the surface is cleaned with some convincing method (sand-blast).

In this case, a layer is obtained in an aqueous state adhering to the metallic surface, that is, to the follicles. The exposed metal surface is cleaned so that only the follicular surfaces are covered on the figure # 3. Finally, it is dried and sintered in an oven at temperatures of 50 ° C in a time range of between 5 to 600 minutes as want to obtain glasses or hydroxyapatite.

If the surface is dry and sintered, this geometry, accompanied by a recirculation, will provide a bi-functional and synergistic fixation by biological morphological fixation of bone in bioactive surfaces.

Claims (1)

1. CLAIMS Described enough my invention, I consider as a novelty and therefore exclusive property, what is contained in the following clauses: of obtaining an active follicular surface in a surgical implant met s of articular or dental type characterized because it comprises the following stages Obtain the pattern with follicular surface. Assemble the pouring tree. apply the ceramic coating. Sinter. Preheat the ceramic mold. aciar the liquid metal. Apply the bioactive coating. for obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 1, characterized in that it has a pattern in wax or polystyrene through a mold, the purpose is im spherical in the areas of interest (a bone-integrate) of the pattern, where the for obtaining an active follicular surface in a metallic or dental type surgical implant, according to claims 1 and 2, characterized in that it is made in wax or in polystyrene or other material with similar characteristics of the mold. for obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 1, characterized in that in the the pattern of the prosthesis with the follicular cavities in an ali system to the casting configuration to form the pouring tree for obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 5, characterized in that the con (casting tree) can be previously designed by means of finite element methods or finite differences. for obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 1, characterized in that in the assembly of the casting tree in wax or polystyrene the sludge is prepared for obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 8, characterized in that the preparation of the sludge can preferably be colloidal silica. or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 8, characterized in that the sludge for the preparation of the sludge can preferably be 75% zirconium sand No.-350. or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 8, characterized in that the mogenized must be in a time of 60 seconds with Zahn cup # 4 prefere or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 8, characterized in that it is possible to regulate the viscosity of the mixture. or of obtaining an active follicular surface in a surgical implant met ' or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 14, characterized in that it is allowed to dry for a period of time between four to eight hours and repeating instructions 13, 14 and 15 until obtaining a sufficient ceramic thickness for t-static static exerted during the emptying of liquid metal. or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 15, characterized in that the wax or polystyrene tree is ceramic, the wax is evacuated, and the wax is evacuated. or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 1, characterized in that it preheats at a temperature of between 900 ° C to 1100 ° C for three or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 17, characterized in that and preheated the mold, in parallel the metallic alloy is blended bioc or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 1, characterized in that i metal implant free of contaminants and with the bone follicles-int prepare a gel solution of a bioactive glass or Hydroxyapatite uses lcohol or some agent with similar characteristics. or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 20, characterized in that the gel ion must provide the ability to flow and fill the follicles of the surface when the follicles are shaken the implant metallic until partially draining the bioactive or hydroxyapatite. ? of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 21, characterized in that the gel ion of the bioactive glass or of the hydroxyapatite must be from 40 to 60 according to 4, or else a viscosity that provides the ability to flow and fill the ethnic follicle. or of obtaining an active follicular surface in a metallic or dental type surgical implant, according to claim 23, characterized in that it ends sintering in a furnace at temperatures between 700 ° C and 1250 ° C in a range of 600 minutes as want to obtain the degree of sintering of the ita.