# US 10,864,083 B2 · Mechanical assembly including exterior surface preparation

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- Number: US 10,864,083 B2
- Document ID: US10864083B2
- Status: Granted
- Kind: B2
- Application number: 15/234,927
- Filed: 2016-08-11
- Published: 2017-10-12
- Granted: 2020-12-15
- Earliest claimed: 2016-04-07
- Applicants: Kambiz Behzadi
- Inventors: Kambiz Behzadi
- Web page: https://patentgrep.com/patent/US10864083B2

## CPC

- A61F 2/34: Acetabular cups
- B33Y 10/00: Processes of additive manufacturing
- A61F 2/30965: {Reinforcing the prosthesis by embedding particles or fibres during moulding or dipping}
- A61F 2/4609: {of acetabular cups}
- A61F 2002/30014: {differing in elasticity, stiffness or compressibility}
- A61F 2002/30904: {serrated profile, i.e. saw-toothed}
- A61F 2002/3092: {having an open-celled or open-pored structure}
- A61F 2002/30985: {using three dimensional printing [3DP]}
- A61F 2002/3417: {the outer shell having protrusions on meridian lines, e.g. equidistant fins or wings around the equatorial zone}
- A61F 2002/342: {the outer shell having circumferential protrusions parallel to the equatorial plane, e.g. circumferential fins or wings}
- A61F 2002/3425: {the outer shell having non-meridian protrusions, e.g. fins or wings, located in planes inclined or perpendicular with respect to the equatorial plane}
- A61F 2002/4681: {by applying mechanical shocks, e.g. by hammering}
- A61F: FILTERS IMPLANTABLE INTO BLOOD VESSELS; PROSTHESES; DEVICES PROVIDING PATENCY TO, OR PREVENTING COLLAPSING OF, TUBULAR STRUCTURES OF THE BODY, e.g. STENTS; ORTHOPAEDIC, NURSING OR CONTRACEPTIVE DEVICES; FOMENTATION; TREATMENT OR PROTECTION OF EYES OR EARS; BANDAGES, DRESSINGS OR ABSORBENT PADS; FIRST-AID KITS (dental prosthetics A61C)
- B33Y: ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING

## Abstract

A system and method for further improving upon an ability of a surgeon to reduce or eliminate impaction forces when installing or assembling a prosthesis. An implant includes a surface treatment for aiding operations with the implant. For example, some surface treatments provide an asymmetry in installation versus removal to bias the associated implant deeper into an installation site.

## Claims

### Claim 1

A method for producing a prosthesis configured for an installation into a prepared cavity in a portion of bone, comprising:
a) manufacturing additively a unitary structure for the prosthesis, said unitary structure including a foundation and an exterior surface layer defined on a portion of said foundation; and
b) establishing, during said step a) manufacturing, a multi dimensional asymmetric stiffness framework within said foundation of said unitary structure.

### Claim 2 (depends on 1)

The method of claim 1 wherein said framework includes a first set of stiffness-defining structures oriented in a first direction and further includes a second set of stiffness-defining structures oriented in a second direction, said second direction different from said first direction, said sets of stiffness-defining structures cooperatively configured to produce said multi dimensional asymmetric stiffness.

### Claim 3 (depends on 2)

The method of claim 2 wherein said first set includes a plurality of longitudinally extending rib elements and wherein said second set includes a plurality of laterally extending circumferential plank elements.

### Claim 4 (depends on 2)

The method of claim 2 wherein said first set includes a first plurality of helical structures installed clockwise about an axis and wherein said second set includes a second plurality of helical structures installed counterclockwise about said axis with said pluralities of helical structures cooperatively configured to produce a multi-dimensional asymmetric stiffness.

### Claim 5 (depends on 1)

The method of claim 1 wherein said manufacturing additively step a) includes a step of three-dimensional printing of at least a portion of said structure.

### Claim 6 (depends on 1)

The method of claim 1 wherein said multi-dimensional asymmetric stiffness is responsive to a set of distinct structures disposed within the prosthesis.

### Claim 7 (depends on 1)

The method of claim 1 wherein said multi-dimensional asymmetric stiffness is responsive to a set of non-homogenous-stiffness elements associated with the prosthesis.