silicone in prosthetics properties and usemarket dynamics 58% 42% ... grades of silicone elastomers...
TRANSCRIPT
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Silicone in prosthetics – Properties and Use
Freygarður Þorsteinsson
February 22, 2016 Reykjavik University
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3/4/2016 1
Agenda
• About Össur
• About Silicones
• Use of Silicones in prosthetics
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About Össur
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3/4/2016 3
Employees: ~ 2,500
Sales: ~ > $ 500m
Global leader in non-invasive orthopaedics
Second largest player in bracing and supports
and prosthetics worldwide
Growing through innovation and expanding in the
value chain
Listed on Nasdaq OMX Copenhagen
ÖSSUR TODAY – WHO WE ARE
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OUR STRATEGY
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0%
10%
20%
30%
40%
50%
0
100
200
300
400
500
600
1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014
Sales EBITDA % margin
GROWTH STORY
$ m
illio
n
Prosthetics
consolidationGrowth
Prosthetics
integration and
restructuring
B&S
consolidation
B&S integration and
restructuring
CAGR: 25%
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3/4/2016 7
Bra
cin
g &
su
pp
ort
sP
rosth
etics
Injury
Solutions
People living with
osteoarthritis
People recovering from
fractures, ligament injuries or
need a post operative treatment
GLOBAL PROVIDER OF HEALTHCARE SOLUTIONS
USER PROFILE IMPROVING PEOPLE‘S MOBILITY
Non surgical treatment by unloading
affected joint with braces
Products stabilizing joints
Complete product offering for
lower extremity prosthetics
Advanced microprocessor
controlled feet and knees
People living with lower
extremity amputation
OA
Mechanical
products
Bionic
products
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Bra
cin
g &
su
pp
ort
sP
rosth
etics
# 3 globally
MARKET DYNAMICS
58%
42%
# 2 globally
• Aging population
• Prevalence of Osteoarthritis
• Demand for quality of life
• Reimbursement
• Aging population
• Technological developments
• Vascular diseases & diabetes
• Reimbursement
ÖSSUR MARKETS & TRENDS
SALES1 MARKET
• Market size: $ 950m
• Expected market growth: 3%
• Market size: $ 2,700m
• Expected market growth: 3-4%
1 Based on total sales split in 2014
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GLOBAL OPERATIONS – WELL DIVERSIFIED
Headquarters
Reykjavik, Iceland
Össur Asia
Shanghai,China
Össur Americas
California, USA
Össur EMEA
Eindhoven,
Netherlands
Operations in 18 countries - 2,500 employees
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ÖSSUR WORLDWIDE IP PORTFOLIOSTATUS Q3 2015
• Registered patents: 1095 • Pending applications: 397
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3/4/2016 11
Silicone as biomaterial
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Fact
Most of you have been in contact with silicone in some form today
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History of silicone
•Before 1930: Silicone atom compounds with Si-C bonds created
and investigated
•1930-40: Silicone commercialized
•1940’s-present: Silicone bio-inertness and properties investigated
•1950’s: Silicone first used in medical applications
•1980’s: Silicone liners first produced by Össur
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Characteristics of silicones
• Non-reactive
• Thermally stable/ Non-combustible
• Electrically insulating
• Optical clarity
• High permeability to gases
• Radiation resistant
• High purity
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Properties of silicone elastomers
• High elongation (typically 600 - 1000%)
• Good tear strength
• Unique modulus at typical elongation
• Controllable softness
• Low compression set
• Oxygen permeability
• Bio-inert
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Typical uses of silicone
• Semiconductors (electronics)
• Automotive (gaskets and seals)
• Aerospace (seals)
• Implants
• Other medical grade products
• Additives in various cosmetic products
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3/4/2016 17
The Conversion
From sand to… silicone liner
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Preparation of silicone
SiO2 + 2C → Si + 2COQuartz coke
Si + 2CH3Cl → Me2SiCl2 + other
2Me2SiCl2 + H2O → 2Me2Si(OH)2 + HCl
Unstable
Electric
Furnace
Reactor
3000 °C
Cu catalyst300 °C
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Preparation of silicone - cont.
HO[(CH3)2SiO]MH →
Linear siloxane
KOH
Octamethylcyclotetrasiloxane, D4
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Preparation of silicone - cont.
D4 + Endblockers → Linear polymer
Linear polymer + various additives → Silicones with different properties
Base or
Acid
catalyst
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The silicone family tree
Fluids
(Free chains)
Gels
(Crosslinked)
Elastomers
(Crosslinked and
reinforced)
Resins
(Heavily
crosslinked)
Silicone
Personal care
products
Soft tissue
implants
Wound and
burn treatment
Catheters
Prosthetic
products
Intraocular
lenses
Pressure
sensitive
adhesives
Reinforcement
for optically
clear silicone
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The silicone family tree
Fluids
(Free chains)
Gels
(Crosslinked)
Elastomers
(Crosslinked and
reinforced)
Resins
(Heavily
crosslinked)
Silicone
Personal care
products
Soft tissue
implants
Wound and
burn treatment
Catheters
Prosthetic
products
Intraocular
lenses
Pressure
sensitive
adhesives
Reinforcement
for optically
clear silicone
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Grades of silicone elastomers
• Medical grade – Unrestricted
- Suitable for long term implants (>28 days)
• Medical grade – Restricted
- Suitable for implants up to 28 days
• Engineering grade
- Same material as the medical grade but less testing on each batch, listed on FDA master list.
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Silicone - Use in
prosthetics
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The task
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The prosthesis
Liner
Socket
Foot
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Clinical Need
TechnicalSolution
Suspension
Comfort
Fit
Skin care
Elongation
Compression set
Durability
Biocompatibility
Matching needs and solutions
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Tensile Strength
• According to ASTM D412-06a
• To measure tensile properties of various silicones, namely Force @ 100%
elongation [N/mm²], Force @ 200 % elongation [N/mm²], Strain @ Peak [%] ,
and Stress @ Break [N/mm²]
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Physical properties - Modulus
Stress-strain curve
-20
0
20
40
60
80
100
120
140
160
180
Elongation (%)
Lo
ad
(N
)
100 200 300-100 400 500 600
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Tear Strength Measurements
• According to ASTM D2240
• Tear strength is defined as the maximum force per mm² required to tear
silicone which already has a nick in it
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Durometer
• According to ASTM D 2240 -05
• To compare the indentation hardness in silicone elastomers
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Photo: Íþróttasamband fatlaðra
The users
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Silicone elastomer, Iceross
Stiffness modified by chain length, level of crosslinking & skincare
additives
SkinCare ingredients
=+
Dimethylsiloxane-chains
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Össur main silicone types
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Exposure
• We estimate that everyday Össur silicone liners cover 50 – 60000 m2 of human flesh
• That is about the size of 7-8 average size football fields
• Use time per day can be 12-16 hours
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Why silicone?
• Stability and Comfort
- Good elastic properties reliable suspension- Conforms to residual limb shape total contact
• Biocompatibility
- Long history in medical use very low risk of medical problems due to the material
- Stable material very low allergy risk
• Durability
- Smooth surface easy to clean and maintain- Good mechanical properties durable liners
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The future
• More specialized solutions meeting individual needs (custom made solutions)
• Active ingredients – special functions
• Combination of materials
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