DE10157315C1 - Hip replacement joint comprises ball and socket, surface of ball being etched to roughen it by forming microstructure of grooves - Google Patents

Hip replacement joint comprises ball and socket, surface of ball being etched to roughen it by forming microstructure of grooves

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Publication number
DE10157315C1
DE10157315C1 DE10157315A DE10157315A DE10157315C1 DE 10157315 C1 DE10157315 C1 DE 10157315C1 DE 10157315 A DE10157315 A DE 10157315A DE 10157315 A DE10157315 A DE 10157315A DE 10157315 C1 DE10157315 C1 DE 10157315C1
Authority
DE
Germany
Prior art keywords
bearing surface
characterized
surface
particular
preceding
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
DE10157315A
Other languages
German (de)
Inventor
Alfons Fischer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
UNIVERSITäT DUISBURG-ESSEN, 45141 ESSEN, DE
Original Assignee
AlCove Surfaces GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by AlCove Surfaces GmbH filed Critical AlCove Surfaces GmbH
Priority to DE10157315A priority Critical patent/DE10157315C1/en
Priority claimed from AU2002352095A external-priority patent/AU2002352095A1/en
Application granted granted Critical
Publication of DE10157315C1 publication Critical patent/DE10157315C1/en
Application status is Expired - Fee Related legal-status Critical
Anticipated expiration legal-status Critical

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02Parts of sliding-contact bearings
    • F16C33/04Brasses; Bushes; Linings
    • F16C33/06Sliding surface mainly made of metal
    • F16C33/14Special methods of manufacture; Running-in
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2223/00Surface treatments; Hardening; Coating
    • F16C2223/30Coating surfaces
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40Linear dimensions, e.g. length, radius, thickness, gap
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/42Groove sizes
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2240/00Specified values or numerical ranges of parameters; Relations between them
    • F16C2240/40Linear dimensions, e.g. length, radius, thickness, gap
    • F16C2240/60Thickness, e.g. thickness of coatings
    • F16C2240/64Thickness, e.g. thickness of coatings in the nanometer range
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16CSHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2316/00Apparatus in health or amusement
    • F16C2316/10Apparatus in health or amusement in medical appliances, e.g. in diagnosis, dentistry, instruments, prostheses, medical imaging appliances

Abstract

Hip replacement joint comprises a ball (2) and socket (3). The surface (4) of the ball is etched to roughen it by forming a microstructure of grooves. Independent claims are included for: (a) a composite surface for a joint comprising an etched, roughened surface as above with a coating over it; and (b) a method for making the joint, as described above.

Description

The present invention relates to an implant according to the preamble of Claim 1, a use of micro-rough storage area according to the upper Concept of claim 11 and a method for producing an implant deeds according to the preamble of claim 12.

In the case of an implant with a bearing surface, in particular a hip joint or the like, a long service life with low friction is desirable. Become frequent Storage surfaces made of metal, ceramic or plastic are used.

Particle formation is particularly problematic a plain bearing to an undesirable so-called three-body abrasion (Bearing surface / particles / counter bearing surface). In particular, this can in an undesirable formation of scratches, grooves or the like in the storage area surface and the counter bearing surface with the consequence of a reduction in the service life result. Furthermore, this can lead to undesired stiffness or Lead to increased friction.

EP 0 761 242 A1 discloses an implant with a bearing surface. Ver The bearing surface made of a semi-kri improves wear properties stallinen thermoplastics manufactured.

EP 0 858 786 A2 discloses an implant with a metallic bearing surface che. To improve the wear properties acts on the metallic Bearing surface an electromotive force.

DE 37 22 410 A1, which is the starting point of the present invention forms, discloses an acetabular cup. To increase wear resistance speed is a sliding layer made of titanium nitride with a layer thickness of up to 5 µm and an average roughness of <3 µm is provided.

The present invention is based on the object of an implant Using a micro-rough storage area and a manufacturing process ment to specify an implant, so that the Ver  Wear or abrasion can be minimized or at least reduced, the formation of particles or at least the escape of particles can be reduced and / or the friction can be reduced, in particular the service life of the Storage area is long.

The above object is achieved by an implant according to claim 1, a ver Application according to claim 11 or a method according to claim 12 solved. Advantageous further developments are the subject of the dependent claims.

A basic idea of the present invention is the storage area che at least in some areas, preferably at least in the entire support or load area to be micro-rough by etching.

Under "micro-rough" there is such a rough one - preferably down to the mic scopic (µm range) - understanding of surface formation, that particles of up to 100 nm, preferably up to 1 µm or even up to 10 µm, at least partially absorbed by depressions in the surface and in particular can be stored in it.

The micro-rough design of the storage area leads to several advantages:
First, particles that form can be taken up in depressions and in particular permanently stored there. This applies in particular to very fine or micro-particles, which arise primarily when two surfaces slide on each other. The three-body abrasion can thus be effectively reduced or even minimized.

Second, micro-rough storage area can become easier on adjust an assigned counter bearing surface. This is particularly true due to plastic deformation or flattening of the micro hills allows. So it "runs" preferably from the implant used slide bearing or joint faster.

Third, the depressions of the micro-rough bearing surface form a lubricant reservoir. This is a decrease in Friction and / or increased service life are beneficial.  

Fourth, the micro-rough storage area is in its surface significantly enlarged compared to a smooth surface. The ver Larger surface area can make particles and / or lubricants better tie or hold. Again, this is a decrease in Friction and / or reduction in tool life, especially due to Reduction of three-body caused by free particles Abrasion, beneficial.

The micro-rough bearing surface is preferably at least for the most part in particular, macroscopically smooth. For the human So the bearing surface appears smooth to the eye, even if there is discoloration or optical effects a color-varying appearance of the bearing surface can effect.

Embodiments of the present invention tion result from the following description with reference on the drawing. It shows:

Fig. 1 is a schematic view of a proposed in plantats with an at least partially micro-rough bearing surface;

Fig. 2 is a schematic, partially enlarged sectional representation of the bearing surface neglecting the existing in the Ausfüh approximate shape of Figure 1 curvature of the bearing surface .

Fig. 3 shows an enlarged detail of FIG. 2.

Fig. 1 shows a schematic illustration of a proposed implant according to 1, which is formed in the illustrated embodiment as a joint, namely, as the hip joint. However, it can also be, for example, another joint, such as an artificial knee joint or another implant that performs a storage function.

The implant 1 shown has a bearing head 2 and an associated bearing shell 3 which, for reasons of illustration, are shown in a state in which they have been moved away from one another in FIG. 1. To illustrate, the bearing shell 3 is also shown in section.

Instead of training as a bearing head 2 and bearing shell 3 , the one on the associated bearing elements can also have another shape adapted to the respective purpose. In particular, sliding and / or rolling storage can be provided.

In the illustrated example, the implant 1 or its bearing head 2 has a preferably metallic bearing surface 4 , which is micro-rough at least in a region 5 , in particular at least in the entire rolling or bearing region. The micro-rough area 5 is shown in dotted lines in FIG. 1 for illustrative purposes.

In fact, the roughening of the bearing surface 4 in the area 5 or in the entire bearing surface 4 is so finely formed that the bearing surface 4 appears optically smooth to the human eye, even if the roughening of a color-irregular appearance of the bearing surface 4 in the micro- rough area 5 leads.

The implant 1 is made of a suitable material or several materials, such as metal, ceramic, plastic, composite material or the like.

The bearing surface 4 is preferably formed from a tough or ductile material. In particular, the bearing surface 4 is formed from plastic, ceramic or metal, preferably from steel, iron, titanium, chromium, an alloy based on iron, titanium or chromium and / or a cobalt-chromium alloy.

Fig. 2 is an enlarged, fragmentary sectional view of the bearing surface 4, with a subsequent surface layer 6 of the bearing head 2, wherein for simplicity of illustration, the macroscopic Woël environment of the bearing surface 4 in the illustrated embodiment, so the ball head or kalottenaratige design of the bearing surface 4 omitted has been. Instead, the bearing surface 4 is shown macroscopically flat in FIG. 2.

The micro-rough bearing surface 4 is provided for their nanostructuring with a large number of depressions 7 and elevations 8 , the hen go into each other or alternate. In particular, the depressions 7 and elevations 8 merge into one another such that at least essentially no flat surface sections are formed between them.

The actual surface 9, the micro-rough bearing surface 4 accordingly significantly greater than that mediated by the macroscopically smooth contour 10 macroscopic area of extent of the bearing surface. 4 In the example shown, the surface 9 is preferably at least 2 times, in particular at least 2.5 times or 3 times, the macroscopic extension surface of the bearing surface 4 .

The only indicated on the right in Fig. 2, macroscopically smooth contour 10 can be regarded as the desired profile in a macroscopically common, for example machining or grinding processing, who is preferably macroscopically smooth. The contour 10 is in the Dar position shown in FIG. 2 for explaining or defining the average roughness R a not on the elevations 8 , but between the elevations 8 and the depressions 7 . The mean roughness R a namely represents the mean deviation of the elevations 8 and depressions 7 from the mean, macroscopically smooth target surface or contour 10 , as indicated in FIG. 2.

The two dashed lines on the right side of FIG. 2 indicate the height deviations of the recesses 7 or the elevations 8 from the middle, macroscopically smooth contour 10 . The specified average roughness R a is determined from these deviations.

The average roughness R a of the bearing surface 4 in the micro-rough area 5 is at least 100 nm and / or at most 10 μm, in particular up to 2 or 1 μm.

The roughness depth R T , ie the maximum height difference between one of the elevations 8 and one of the depressions 7 in the nanoscopically rough region 5 , is preferably at most 10 μm, in particular up to 2 or 1 μm.

The average diameter D of the depressions 7 is preferably at least 100 nm and / or preferably at most 10 μm, in particular up to at most 3 or 1 μm. A diameter of 200 to 500 nm is very particularly preferred.

The elevations 8 and the depressions 7 are in particular very irregularly formed, as indicated schematically in FIG. 2. Preferably, the elevations 8 and depressions 7 are in turn structured or rough on their surface, as shown by the schematic schematic enlargement acc. Fig. 3 indicated.

However, a regular or at least substantially uniform formation of the depressions 7 and / or the elevations 8 is also possible in principle.

Despite the irregularity mentioned, profiling or structuring in the nanometer range, ie in particular with structure widths of less than 1000 nm, in particular less than 500 nm, can be referred to in the micro-rough bearing surface 4 . The structural width here denotes the measure with which individual structural elements, such as the depressions 7 and elevations 8 , are retrieved, that is to say, for example, the center distance between mutually adjacent elevations 8 or depressions 7 adjacent to one another.

The depressions 7 or elevations 8 are preferably arranged irregularly distributed over the bearing surface 4 at least in the rough area 5 , the adjacent depressions 7 being separated from one another by preferably also irregularly shaped elevations 8 . In principle, however, an at least substantially uniform distribution of the recesses 7 or elevations 8 on the bearing surface 4 is also possible.

The mean surface density of the depressions 7 or elevations 8 is preferably at least 1.10 5 / mm 2 , in particular at least 2.10 5 / mm 2 or 5.10 5 / mm 2 .

The bearing surface 4 is assigned a counter bearing surface 11 , which is formed in the presen- tation example on the bearing shell 3 , as indicated in Fig. 1.

The counter bearing surface 11 is designed complementary to the bearing surface 4 in the illustrated example. However, the counter bearing surface 11 - depending on the intended use and joint or bearing structure - can also have a shape that deviates from the complementary surface shape.

In the example shown, the bearing surface 4 and the counter bearing surface 11 slide on one another, thus forming a plain bearing. However, rolling movements can also be superimposed on the sliding movement. As already mentioned above, other bearing forms can also be realized, for example with a flat bearing surface 4 and / or counter bearing surface 11 or with a primary rolling movement.

The counter bearing surface 11 is preferably at least essentially smooth, that is to say preferably both macroscopically smooth and nanoscopically smooth (ie not micro-rough).

If necessary, the counter bearing surface 11 can also be made micro-rough, at least in some areas. According to a variant, the counter bearing surface 11 is provided with fine pores or cavities open to the outside, for example with an average diameter of 100 to 1000 nm. In particular, the counter bearing surface 11 is formed by an oxide layer made of a so-called valve metal (formation of the pores or cavities by anodization), preferably aluminum oxide. The pores or cavities can then take up additionally formed particles and / or serve as a lubricant reservoir.

The counter bearing surface 11 is formed from a suitable material, such as plastic, ceramic or metal. The counter bearing surface 11 is preferably harder than the bearing surface 4 or its rough area 5 , in order to achieve the desired absorption of particles that are formed in the recesses 7 of the bearing surface 4 . In particular, the counter bearing surface 11 is formed from silicon dioxide or aluminum oxide. For example, the counter bearing surface 11 can also be formed from the same or a similar material as the bearing surface 4 .

In the illustrated example, the at least partially rough bearing surface 4 on the bearing head 2 and the counter bearing surface 11 on the bearing shell 3 are formed. However, this can also be the other way round.

The bearing surface 4 and the counter bearing surface 11 can slide directly onto one another, depending on the use, that is to say, a lubricant-free bearing, if necessary. A lubricant 12 is preferably assigned to the bearing surface 4, at least in the rough area 5 , as indicated in FIG. 1. The lubricant 12 is preferably formed by the body's own substances, but can also be an artificial lubricant 12 or the like.

The implant 1 shown forms an artificial hip joint. In the implantation, the shaft 13 is inserted into a thigh bone 14 indicated in FIG. 1 and the bearing shell 3 is inserted into an associated hip bone area (not shown).

The proposed implant 1 is preferably used or used such that the - preferably macroscopic - surface pressure of the bearing surface 4 or its area 5 is at most 100 MPa, in particular at most 50 MPa or 20 MPa. This applies in particular to the metallic design of the bearing surface 4 , but also depends on the material used.

The proposed micro-rough design of the bearing surface 4 leads, in particular in combination with a preferably at least substantially smooth and / or harder counter bearing surface 11, to enable a very rapid shrinkage with little particle formation or at least low particle separation. In addition, there is a relatively low friction. This can be explained by the fact that in the running-in phase a rapid adjustment of the bearing surface 4 , which is preferably formed from a tough and / or ductile material, in particular metal, to the counter bearing surface 11 takes place, resulting particles which otherwise lead to the undesirable three-body -Abrasion can result from the recesses 7 of the bearing surface 4 . In addition, the lubricant 12 adheres particularly well to the large surface 9 of the bearing surface 4 , a relatively large lubricant reservoir also being formed in the recesses 7 , so that low friction, in particular sliding friction, is possible.

Tests have also shown that a further advantageous effect can occur in the proposed solution. Particularly in the case of metallic bearing surfaces 4 , the resulting metal particles can form - at least in some areas - a very solid particle layer of, for example, approximately 10 nm thickness on the elevations or micro hills 8 . The forming Parti kelschicht may be very good because of the connecting grooves 7 with the bearing surface. 4 A high strength of the particle layer can result in particular in that the individual metal particles, due to their small size, oxidize at least partially, in particular at least largely completely. A particularly hard oxide layer is then formed from the particles, which is accordingly very wear-resistant or abrasion-resistant.

A particularly preferred surface shape of the bearing surface 4 is obtained by etching the bearing surface 4 , in particular using sulfuric acid and / or chromosulfuric acid. In addition, this allows simple manufacture. In example, the metallic, in particular made of stainless iron or steel or a cobalt-chromium alloy bearing surface 4 is exposed to the heated acid. When the acid is heated to approximately 200 ° C., approximately a molar concentration, an exposure time of 30 minutes to 2 hours is sufficient. Accordingly, a wet chemical treatment or roughening of the bearing surface 4 can take place.

As an alternative or in addition, electrochemical support or promotion of the etching process can also take place. For example, then about 30 ° C to 70 ° C, preferably about 40 ° C warm acid is sufficient to etch the bearing surface 4 accordingly at comparable time, that is to say to partially remove it with the formation of the depressions 7 .

Claims (14)

1. Implant ( 1 ), in particular a joint, such as a hip joint or knee joint, with a micro-rough bearing surface ( 4 ) through recesses ( 7 ), characterized in that the recesses ( 7 ) are formed by etching the bearing surface ( 4 ).
2. Implant according to claim 1, characterized in that the bearing surface ( 4 ) is macroscopically smooth.
3. Implant according to one of the preceding claims, characterized in that the bearing surface ( 4 ) is formed from a tough material.
4. Implant according to one of the preceding claims, characterized in that the bearing surface ( 4 ) made of plastic, ceramic or metal, in particular special steel, iron, titanium, chromium, an iron, titanium or chromium-based alloy and / or a cobalt-chromium alloy.
5. Implant according to one of the preceding claims, characterized in that the bearing surface ( 4 ) has an average roughness (R a ) of at most 10 microns, in particular up to 5 microns or 2 microns.
6. Implant according to one of the preceding claims, characterized in that the bearing surface ( 4 ) has a roughness depth (R T ) of at most 10 µm, in particular up to 5 µm or 2 µm.
7. Implant according to one of the preceding claims, characterized in that the bearing surface ( 4 ) between the recesses ( 7 ) has at least substantially no flat surface sections.
8. Implant according to one of the preceding claims, characterized in that the depressions ( 7 ) have an average diameter (D) of at least 100 nm and / or at most 10 µm, in particular at most 2 µm or 1 µm.
9. Implant according to one of the preceding claims, characterized in that the bearing surface ( 4 ) the recesses ( 7 ) with a surface density of at least 1.10 5 / mm 2 , in particular at least 2.10 5 / mm 2 or 5.10 5 / mm 2 , are provided is.
10. Implant according to one of the preceding claims, characterized in that the bearing surface ( 4 ) is assigned a counter bearing surface ( 11 ) which is harder than the bearing surface ( 4 ).
11. Use of a micro-rough bearing surface ( 4 ) to reduce particle formation or release and / or to reduce the friction in egg nem implant ( 1 ) according to any one of the preceding claims, characterized in that the bearing surface ( 4 ) with a mean macroscopic surface pressure of a maximum of 100 MPa.
12. A method for producing an implant ( 1 ) with a micro-rough bearing surface ( 4 ), characterized in that the bearing surface ( 4 ) is roughened wet-chemically by etching.
13. The method according to claim 12, characterized in that the roughening hen by the action of especially heated acid, preferably of chromic sulfuric acid and / or sulfuric acid.
14. The method according to claim 12 or 13, characterized in that the bearing surface ( 4 ) made of plastic, ceramic or metal, in particular steel, iron, titanium, chromium, an iron, titanium or chromium-based alloy and / or a cobalt -Chrome alloy.
DE10157315A 2001-11-23 2001-11-23 Hip replacement joint comprises ball and socket, surface of ball being etched to roughen it by forming microstructure of grooves Expired - Fee Related DE10157315C1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE10157315A DE10157315C1 (en) 2001-11-23 2001-11-23 Hip replacement joint comprises ball and socket, surface of ball being etched to roughen it by forming microstructure of grooves

Applications Claiming Priority (7)

Application Number Priority Date Filing Date Title
DE10157315A DE10157315C1 (en) 2001-11-23 2001-11-23 Hip replacement joint comprises ball and socket, surface of ball being etched to roughen it by forming microstructure of grooves
AU2002352095A AU2002352095A1 (en) 2001-11-23 2002-11-22 Bearing and composite structure
EP02787769A EP1448908B1 (en) 2001-11-23 2002-11-22 Implant
DE50205771A DE50205771D1 (en) 2001-11-23 2002-11-22 Implant
PCT/EP2002/013123 WO2003044383A1 (en) 2001-11-23 2002-11-22 Bearing and composite structure
AT02787769T AT317070T (en) 2001-11-23 2002-11-22 Implant
US10/496,573 US20050049716A1 (en) 2001-11-23 2002-11-22 Bearing and composite structure

Publications (1)

Publication Number Publication Date
DE10157315C1 true DE10157315C1 (en) 2003-08-14

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Family Applications (1)

Application Number Title Priority Date Filing Date
DE10157315A Expired - Fee Related DE10157315C1 (en) 2001-11-23 2001-11-23 Hip replacement joint comprises ball and socket, surface of ball being etched to roughen it by forming microstructure of grooves

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DE (1) DE10157315C1 (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8475505B2 (en) 2008-08-13 2013-07-02 Smed-Ta/Td, Llc Orthopaedic screws
US9358056B2 (en) 2008-08-13 2016-06-07 Smed-Ta/Td, Llc Orthopaedic implant
US9561354B2 (en) 2008-08-13 2017-02-07 Smed-Ta/Td, Llc Drug delivery implants
US9616205B2 (en) 2008-08-13 2017-04-11 Smed-Ta/Td, Llc Drug delivery implants
US9700431B2 (en) 2008-08-13 2017-07-11 Smed-Ta/Td, Llc Orthopaedic implant with porous structural member
WO2019077045A1 (en) 2017-10-19 2019-04-25 Friedrich-Alexander-Universität Erlangen-Nürnberg Implant
DE102017012229A1 (en) 2017-10-19 2019-04-25 Friedrich-Alexander-Universität Erlangen-Nürnberg implant

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2824063A1 (en) * 1977-06-02 1978-12-14 Johnson Matthey Co Ltd bone prosthesis
DE3722410A1 (en) * 1986-07-21 1988-02-04 Karl Marx Stadt Tech Hochschul Wear-resistant hip joint socket
DE4336932A1 (en) * 1993-10-29 1995-05-04 Biovision Gmbh Sliding partner in joint endoprosthetics
DE29903768U1 (en) * 1999-03-02 1999-09-09 Plus Endoprothetik Ag Tibial component of a knee joint endoprosthesis
EP1118688A1 (en) * 2000-01-19 2001-07-25 Seco Tools Ab Coated body with nanocrystalline CVD coating for enhanced edge toughness and reduced friction

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2824063A1 (en) * 1977-06-02 1978-12-14 Johnson Matthey Co Ltd bone prosthesis
DE3722410A1 (en) * 1986-07-21 1988-02-04 Karl Marx Stadt Tech Hochschul Wear-resistant hip joint socket
DE4336932A1 (en) * 1993-10-29 1995-05-04 Biovision Gmbh Sliding partner in joint endoprosthetics
DE29903768U1 (en) * 1999-03-02 1999-09-09 Plus Endoprothetik Ag Tibial component of a knee joint endoprosthesis
EP1118688A1 (en) * 2000-01-19 2001-07-25 Seco Tools Ab Coated body with nanocrystalline CVD coating for enhanced edge toughness and reduced friction

Cited By (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8475505B2 (en) 2008-08-13 2013-07-02 Smed-Ta/Td, Llc Orthopaedic screws
US8702767B2 (en) 2008-08-13 2014-04-22 Smed-Ta/Td, Llc Orthopaedic Screws
US9358056B2 (en) 2008-08-13 2016-06-07 Smed-Ta/Td, Llc Orthopaedic implant
US9561354B2 (en) 2008-08-13 2017-02-07 Smed-Ta/Td, Llc Drug delivery implants
US9616205B2 (en) 2008-08-13 2017-04-11 Smed-Ta/Td, Llc Drug delivery implants
US9700431B2 (en) 2008-08-13 2017-07-11 Smed-Ta/Td, Llc Orthopaedic implant with porous structural member
US10349993B2 (en) 2008-08-13 2019-07-16 Smed-Ta/Td, Llc Drug delivery implants
US10357298B2 (en) 2008-08-13 2019-07-23 Smed-Ta/Td, Llc Drug delivery implants
WO2019077045A1 (en) 2017-10-19 2019-04-25 Friedrich-Alexander-Universität Erlangen-Nürnberg Implant
DE102017012229A1 (en) 2017-10-19 2019-04-25 Friedrich-Alexander-Universität Erlangen-Nürnberg implant
DE102017124483A1 (en) 2017-10-19 2019-04-25 Friedrich-Alexander-Universität Erlangen-Nürnberg implant

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