# US 9,750,610 B2 · Method and device for preparing artificial bones of cerebral cranium from polyether ether ketone

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- Number: US 9,750,610 B2
- Document ID: US9750610B2
- Status: Granted
- Kind: B2
- Application number: 14/289,671
- Filed: 2014-05-29
- Published: 2014-09-18
- Granted: 2017-09-05
- Earliest claimed: 2011-11-29
- Assignees: Wuhan Constant Science and Technology Ltd.
- Applicants: Wuhan Constant Science and Technology Ltd.
- Inventors: Dengfeng Huang
- Web page: https://patentgrep.com/patent/US9750610B2

## CPC

- A61F 2/2875: {Skull or cranium (A61F2/2803 takes precedence; joints for temporo-mandibular [TM] joints [TMJ] A61F2/3099)}
- A61F 2/30942: {for designing or making customized prostheses, e.g. using templates, CT or NMR scans, finite-element analysis or CAD-CAM techniques}
- A61F 2002/30948: {using computerized tomography, i.e. CT scans}
- A61F 2002/30957: {using a positive or a negative model, e.g. moulds}
- 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)

## Abstract

A method for preparing bones of cerebral cranium, including: a) selecting polyetheretherketone (PEEK) as a raw material according to data obtained by computed tomography (CT) of a patient; b) heating the PEEK material in a heating device to reach a softening point of 260°±10°; c) hot pressing the heated PEEK material obtained in step b) in a forming die, cooling and shaping the PEEK material to yield a blank; d) curing the blank, and placing the blank in a thermostat for removal of internal stress and resilience; e) removing surface crystals and impurities of the blank resulting from the hot pressing; f) mechanically processing the blank according to the CT data of the patient to yield a product having desired size and shape; and g) washing, disinfecting, and packaging the product.

## Claims

### Claim 1

A method for preparing bones of cerebral cranium, the method comprising:
a) selecting polyetheretherketone (PEEK) as a raw material according to computed tomography (CT) data of a patient;
b) heating the PEEK material in a heating device to reach a temperature of 260°±10° C.;
c) hot pressing the heated PEEK material obtained in step b) in a forming die, cooling and shaping the PEEK material to yield a blank;
d) curing the blank, and placing the blank in a thermostat for removal of internal stress and resilience;
e) removing surface crystals and impurities of the blank resulting from the hot pressing;
f) mechanically processing the blank according to the CT data of the patient to yield a product having desired size and shape; and
g) washing, disinfecting, and packaging the product.