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Develop a bone-integration method to permanently implant limb prosthesis By Lokesh Patil

Osseointegrated prosthetics

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Review on osseointegrated prosthetics.

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Page 1: Osseointegrated prosthetics

Develop a bone-integration method topermanently implant limb prosthesis

By Lokesh Patil

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Introduction

• 1.7 million people with limb loss in US• Types of available lower limb prosthesis Limitations of socket type prosthesis - Skin irritations -Bone deterioration -Soft tissue damage -Need for refitting

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Contd..

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Osseointegration

• What is Osseointegration• Different stages of osseointegration• Factors affecting osseointegration

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Titanium properties

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Current bone-integration methods

• Two stages of surgeries performed Stage 1- Implant is fixed in medullary cavity Stage 2: Abutment fixed after 6 months

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Advantages of bone-anchored prosthesis

• Lower feeling of weight• More and precise control over prosthesis• No pain, perspiration and soft tissue damage• No need for socket replacement• Easy donning and doffing• Osseoperception

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Disadvantages

• Two surgeries needed at gap of around six months

• Relatively long Rehabilitation time• High risk of deep-infection• Chances of loosening of implant from the

bone

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Proposed design

• Using a grid blasted ribbon type implant• Incorporation of porous coating of tantalum• Rough surface rather than smooth• Proper fail-safe mechanism

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Limitations, future work and ethics

Limitations-Not enough clinical data-High costs of the methodFuture Work- Use of antimicrobial membranes- Incorporation of soft tissues for load transfer

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Ethics

• Debated use in sports• Can be afforded by a small section of society

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Questions