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Changing Lives through Tissue Donation
Bruce W. Stroever, President & CEO Musculoskeletal Transplant Foundation
MTF is an AATB accredited, non-profit tissue bank located in NJ
MTF provides over 400,000 grafts per year throughout the US
Partnered with Gift of Life Michigan for over 20 years in the recovery, processing and distribution of tissues to hospitals in Michigan
MTF is a non-profit service organization
dedicated to providing quality tissue
through a commitment to excellence in
education, research, recovery and care for
recipients, donors and their families.
MTF Mission Statement
Two Novel Tissue Forms
Flex HD – Acellular dermis
Trinity Evolution – Viable cryopreserved cellular bone matrix
Acellular Dermis
Used primarily for:Abdominal wall repairReconstruction following mastectomy
Essentially a sheet of human collagen processed from human skin
What Makes a Good Hernia Repair Material?
Strong enough to withstand physiological stress over a period of time
Conforms to the abdominal wall
Promotes strong host ingrowth, which mimics normal healing
Resists formation of bowel adhesions and erosion into visceral structures
Doesn’t induce allergic or foreign body reaction
Resists infection
What Makes a Good Hernia Repair Material?
Strong enough to withstand physiological stress over a period of time
Conforms to the abdominal wall
Promotes strong host ingrowth, which mimics normal healing
Resists formation of bowel adhesions and erosion into visceral structures
Doesn’t induce allergic or foreign body reaction
Resists infection
RevascularizationGross examination of acellular dermal matrix after 8 weeks in rabbit study revealed neovascularization around graft perimeter
Source: FlexHD Acellular Dermal Matrix. Histology: In Vitro and In Vivo Studies
Acellularity
Before Processing After Processing
• Processing removes cells and maintains matrix integrity
• Intact matrix structure allows for cell infiltration and revascularization
Source: FlexHD Acellular Dermal Matrix. Histology: In Vitro and In Vivo Studies
Preserved CollagenElastin, in conjunction with collagen, contributes to the
strength and structure of the dermal matrix scaffold
Source: FlexHD Acellular Dermal Matrix. Histology: In Vitro and In Vivo Studies
Magnification shows collagen fibrils in normal skin (left) and acellular dermis (right).
Abdominal Wall RepairWound dehiscence
Trauma
Infected sites
Source: T.N. Robinson et al, Major mesh-related complications following hernia repair: events reported to the Food and Drug Administration. Surgical Endoscopy 2005; 19:1556-1560.
Source: DermaMatrix Acellular Dermis brochure
General - Applications
Abdominal Wall Repair
Plastic - Applications
Source: DermaMatrix Acellular Dermis brochure
Breast Reconstruction – Post Mastectomy
10 monthsPost-OpPre-op
*All images and patient data owned by E. Parra-Davila, MD, permitted use by MTF only. Do not redistribute
Case Studies: Repair and Reconstruction
A Major Concern of the Surgeon is the Size of the Graft
Use of dermatomes – 8cm maximum widthShift to free hand dissection – 20 x 24cmSkill of the recovery team is key to
producing large grafts
Viable Cryopreserved Cellular Bone Matrix
Trinity Evolution
Trinity Evolution: Inception
Background:Stem cells are critical in facilitating bone repairBone marrow aspirates containing live stem cells often
taken from the patient during surgery and combined with bone graft for fusion/bone healing applications
Limitations include limited volume and second surgery site
Trinity Evolution concept:Novel tissue form containing viable stem cells inside an
allograft bone matrix
Bone Formation
Osteoconductive(Scaffold)
Osteoinductive(Growth Factors)
Osteogenic(Living Cells)
Autograft
Allograft
Synthetics
BMP
DBM
Trinity Evolution
Structure & Function
What are the key characteristics of Trinity Evolution?
Osteoconductive Matrix Osteoinductive Factors Osteogenic Cells
Stem Cell Characterization
CD166 positive Osteocalcin positive
Trinity Evolution contains stem cells that are capable of forming bone
Production in the Core
3 teams work around-the-clock Processing completed within 96
hours post mortem
Processing technology maintains:Cell viability Cell location within the matrix
Cryopreservation at MTF
Clinical Applications
To expedite the bone healing process for spinal and orthopaedic needs
Spinal Fusion
Critical Issues for Fresh/Viable Allografts
Time Time Time – the current shelf life of Trinity Evolution is about 6 monthsAll paperwork and testing must be expedited
for tissue to be usable
Sterile TechniqueThese tissues are processed at riskMore than 15% of all donors are rejected
following recoveryNo graft sterilization is possible
Thank You