Method for producing a customised orthopaedic implant

Abstract

A customised orthopaedic implant is provided, the implant being formed of metal, the implant being substantially comprised of a lattice-type geometry that has a periodic arrangement and is conformal to a configuration of a region of bone that was resected to remove bone that is diseased and is optimised to substantially restore a biomechanical function of a bone from which the region of bone was resected on implantation of the customised orthopaedic implant in consideration of the anatomical function and of the properties of a bone type corresponding to the region of bone that was resected, together with patient-specific parameters and anticipated loads to which the implant will be subjected during various typical activities and movements.

Description

PRIORITY CLAIM[0001]The present application is a continuation of U.S. application Ser. No. 15 / 123,024, titled “A METHOD FOR PRODUCING A CUSTOMISED ORTHOPAEDIC IMPLANT,” filed Sep. 1, 2016, which claims the benefit of priority of International Application Serial No. PCT / AU2015 / 000124, titled “A METHOD FOR PRODUCING A CUSTOMISED ORTHOPAEDIC IMPLANT,” filed Mar. 4, 2015, which is incorporated herein by reference.TECHNICAL FIELD[0002]The present invention relates to methods for designing and manufacturing customised orthopaedic implants. More particularly, the method relates to design and production of patient-specific orthopaedic implants for insertion into a resected region of bone.BACKGROUND OF INVENTION[0003]Osteosarcomas are a class of cancer originating from the bone, mainly affecting children or young adults. Prior to the 1970s, amputation was the sole means of treatment available. Amputation results in poor outcomes for patients in terms of quality of life and accordingly curren...

AI Technical Summary

Benefits of technology

The patent text describes a type of implant that is designed to enhance bone growth and reduce stress at the bone-implant interface. This is achieved by using a porous structure called a lattice-type geometry, which has a periodic arrangement of struts that provide predictable mechanical properties and behavior. The porosity of the lattice structure can be adjusted to improve bone ingrowth or increase stiffness of the implant. This allows for greater control over the ultimate performance of the implant in-situ and ensures better outcomes for patients with bone-related disorders.

Problems solved by technology

Amputation results in poor outcomes for patients in terms of quality of life and accordingly current trends are directed toward trying to salvage the affected limb while resecting the tumour in its entirety to reduce the risk of local recurrence and to maximise the prospects of survival.

For elderly patients, the chances of prosthesis failure are greater, due to reduced physical activity and other age related complications such as osteoporosis.

The disparity in stiffness between the existing bone and the orthopaedic implant can lead to bone resorption and subsequent loosening of the orthopaedic implant.

While in some cases, conventional orthopaedic implants do provide a satisfactory result that allow the patient to return to an active lifestyle, in others, use conventional orthopaedic implants has resulted in extended rehabilitation, pain, discomfort, and lack of mobility.

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