Evaluation of Trinity Evolution in Patients Undergoing Foot and Ankle Fusion (TAF)

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Read our disclaimer for details. Identifier: NCT00988338
Recruitment Status : Completed
First Posted : October 2, 2009
Last Update Posted : April 8, 2014
Information provided by (Responsible Party):
Orthofix Inc.

September 29, 2009
October 2, 2009
April 8, 2014
September 2009
January 2013   (Final data collection date for primary outcome measure)
Fusion Success [ Time Frame: 12 months ]
Same as current
Complete list of historical versions of study NCT00988338 on Archive Site
Improvement in scores: Ankle-Hindfoot Scale (AHS), Visual Analog Scale (VAS), and Health Survey (SF-36v2). [ Time Frame: 12 months ]
Same as current
Not Provided
Not Provided
Evaluation of Trinity Evolution in Patients Undergoing Foot and Ankle Fusion
A Radiographic and Clinical Study Evaluating a Novel Allogeneic, Cancellous, Bone Matrix Containing Viable Stem Cells (Trinity Evolution Matrix) in Subjects Undergoing Foot and Ankle Fusion
The purpose of this study is to utilize Trinity Evolution as a graft source in foot/ankle fusions and to follow the subjects to measure the clinical outcomes and fusion rate. The hypothesis of the study is that Trinity Evolution will result in fusion rates and clinical outcomes similar to those obtained from autograft and other routinely used allograft materials; these include: fusion, improvement in pain, improvement in function, and absence of adverse events related to the use of the graft source.

Symptomatic arthritic conditions of the foot and ankle including osteoarthritis, post-traumatic arthritis, inflammatory arthropathies and others can be painful and disabling conditions that lead to a reduced quality of life. Major symptoms include pain, stiffness, swelling, and difficulty walking. Many patients may be initially treatable with non-invasive measures such as analgesics, ankle-foot orthosis, physical therapy and medications such as steroids; however, over time, surgery becomes necessary to improve quality of life and maintain function. Arthrodesis is a well-known procedure that can reduce pain and result in a foot/ankle that can withstand an active lifestyle.

Bone graft is used to stimulate new bone formation at the operative site by providing osteogenic cells with osteoinductive factors with an osteoconductive matrix. Although autologous bone is often used as the structural graft material for fusion procedures, donor site morbidity (e.g., pain, infection, and fracture), limited supply, and inconsistent osteogenic activity continue to be associated problems. The quality of an autograft is dependent upon the age and medical condition of the patient, as well as the number of viable mesenchymal and osteoprogenitor stem cells that are present in the specimen. This tissue is harvested during the surgical procedure; the process can prolong morbidity at the harvest site. The ideal bone graft would offer osteogenic cells, osteoinductive factors, and an osteoconductive matrix with a consistent supply of viable mesenchymal stem cells (MSCs) and osteoprogenitor cells (OPCs)—but without the morbidity of autograft.

Due to the limitations associated with autograft, researchers are pursuing the use of bone-graft substitutes to promote arthrodesis. Bone-graft substitutes now being used by surgeons include ceramic synthetics, bone morphogenic proteins (BMPs), demineralized bone matrices (DBMs) and other allografts; these may be used alone or in combination. Allografts available as substitutes for autograft offer some of the benefits of autograft without its limitations—but do not contain viable MSCs and OPCs.

Trinity Evolution is an allogeneic cancellous bone matrix containing demineralized cortical bone (DCB) as well as viable osteoprogenitor and mesenchymal stem cells. Adult mesenchymal stem cells and osteoprogenitor cells, such as those in Trinity Evolution, are the precursor cells that differentiate into osteoblasts—the cells responsible for bone growth and repair.

Trinity Evolution provides the required osteoconduction, osteogenesis, and osteoinductivity necessary for successful bone grafting. It offers viable osteoprogenitor and mesenchymal stem cells and demineralized cortical bone—all in a single product. Data from preclinical studies with Trinity Evolution have demonstrated in-vitro and in-vivo safety and effectiveness. Trinity Evolution is a "minimally manipulated" tissue that is considered an allograft, and as such, is labeled for bone repair for all orthopedic and podiatric indications where autograft is used. In this study, Trinity Evolution will be used as a substitute for autograft and/or standard allograft in the following arthrodesis procedures: tibiotalar, subtalar, calcaneocuboid, talonavicular, double fusions (i.e. calcaneocuboid and talonavicular), and triple fusions (i.e. subtalar, calcaneocuboid, and talonavicular).

Not Applicable
Intervention Model: Single Group Assignment
Masking: None (Open Label)
Primary Purpose: Treatment
  • Tibiotalar Arthrodesis
  • Subtalar Arthrodesis
  • Calcaneocuboid Arthrodesis
  • Talonavicular Arthrodesis
  • Double Arthrodesis (i.e. Calcaneocuboid and Talonavicular)
  • Triple Arthrodesis (i.e. Subtalar, Calcaneocuboid, and Talonavicular)
Biological: Trinity Evolution
Novel Allogeneic, Cancellous, Bone Matrix Containing Viable Stem and Osteoprogenitor Cells
Other Names:
  • Allograft
  • Mesenchymal Stem Cells
Trinity Evolution
Intervention: Biological: Trinity Evolution
Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
January 2013
January 2013   (Final data collection date for primary outcome measure)

Inclusion Criteria:

  • Foot and/or ankle pathology requiring fusion using open surgical technique with supplemental bone graft/substitute requiring one of the following procedures:

    • Ankle joint fusion
    • Subtalar fusion
    • Calcaneocuboid fusion
    • Talonavicular fusion
    • Double fusions (talonavicular and calcaneocuboid joints)
    • Triple fusions (subtalar, talonavicular, and calcaneocuboid joints)
  • At least 18 years of age
  • Willing and able to comply with the requirements of the protocol including follow-up requirements
  • Willing and able to sign a study-specific informed consent.

Exclusion Criteria:

  • Use of any other bone graft or bone graft substitute in addition to or in place of Trinity Evolution at the time of surgery
  • Use of adjunctive post-operative stimulation
  • Active local or systemic infection
  • Currently pregnant or considering becoming pregnant during the follow-up period
  • Active malignancy or having been on chemotherapy of any kind for a malignancy in the past 1 year
  • Immunosuppressive therapy of any kind within the past 1 year
  • Has a known history of hypersensitivity or anaphylactic reaction to dimethyl sulfoxide (DMSO).
Sexes Eligible for Study: All
18 Years and older   (Adult, Older Adult)
Contact information is only displayed when the study is recruiting subjects
United States
Not Provided
Not Provided
Orthofix Inc.
Orthofix Inc.
Not Provided
Study Director: Raymond J Linovitz, MD Orthofix Inc.
Orthofix Inc.
April 2014

ICMJE     Data element required by the International Committee of Medical Journal Editors and the World Health Organization ICTRP