Tendon AdhesionPhase 2NCT06723782
Surgical Release of Hand Tendons With Wrapping of the Released Tendon Using an Amniotic Membrane
A Phase 2 study testing AMTRIX-D in people with Tendon Adhesion and Tenolysis, run by TBF Genie Tissulaire at 1 site in France.
Trial summary
The goal of this clinical trial is to evaluate whether an amniotic membrane can function as an effective anti-adhesive barrier following surgical release of tendon adhesions. The main question the clinical trial aims to answer is: Can wrapping an amniotic membrane around a surgically released tendon help reduce… Read more about this study
- Who is it for?
- Ages 18 to 65 years
- Conditions the study is for
- Tendon Adhesion, Tenolysis
- What is being tested?
- AMTRIX-D
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 18 participants
- Where
- 1 siteFrance
- Study dates
- 15 Feb 2024to 16 Sep 2026
- Phase
- Phase 2
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 65 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Man or woman aged 18 to 65 years old
- Adhesion of a flexor and/or extensor tendon of the hand.
- Adhesion localized to a single finger.
- Adhesion that has been present for at least 3 months following primary repair, despite high-quality rehabilitation. Primary repair is defined as the repair of a tendon injury, fracture, crush injury of the finger, infection, etc., leading to the adhesion of the tendon to surrounding tissue.
- Patient with a total passive range of motion of the proximal and distal interphalangeal joints of at least 150°.
- Informed and consenting patient.
- Patient enrolled in a social security plan or a beneficiary of such a plan.
Who cannot join
- Pregnant or breastfeeding woman, or without an effective method of contraception.
- Patient requiring tenolysis after tendon grafting for the reconstruction of a deep common flexor or after reimplantation.
- Patient with amputated hand(s).
- Patient with an untreated fracture or non-union in the affected hand.
- Patient requiring multiple surgical interventions that may be potential confounding factors, particularly those involving additional incisions.
- Patient unable to understand rehabilitation or follow the study protocol.
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- Patient with a contraindication to anesthesia.
- Person deprived of liberty by judicial or administrative decision.
- Adult subject to legal protection measures or incapable of expressing consent.
Trial locations and contacts
1 site in 1 country.
France1 site
Institut Chirurgical de la Main et du Membre Supérieur
Lyon, 69006
About this study
The goal of this clinical trial is to evaluate whether an amniotic membrane can function as an effective anti-adhesive barrier following surgical release of tendon adhesions. The main question the clinical trial aims to answer is:
- Can wrapping an amniotic membrane around a surgically released tendon help reduce recurrence of adhesions and promote recovery of hand functionality?
Participants will:
- Undergo surgical treatment (surgical release of the tendon adhesions and wrapping of the amniotic membrane around the release tendon) on Day 0.
- Visit the center for a series of tests 15 days, 6 weeks, 3 months, 6 months after the surgical intervention.
Read the detailed description
Tendon adhesions are a common problem in hand injuries and can have multiple causes. They can occur as a result of tendon damage itself or in the absence of such damage, following a fracture, crush injury, or infection. During healing, tendons become surrounded by an inflammatory exudate rich in fibrin, which can later turn into scar tissue. This scar tissue forms a strong bond between the tendon and the surrounding tissue, leading to significant functional impairment.
In their epidemiological study of 5,229 flexor tendon repairs, Dy et al. determined that 6% of patients who had undergone primary repair required a second intervention, with surgical release of adhesions around the tendons in 58% of cases. In flexor tendon repairs, adhesions are particularly promoted by damage to the tendon sheath, poor junction of the two severed ends of a lacerated tendon, or ischemia of the tendon and immobilization. Regardless of the etiology, adhesions prevent the efficient gliding of the tendon within its sheath, resulting in a discrepancy between near-normal passive range of motion and limited active range of motion.
When the range of motion deficit persists despite 6 months of high-quality rehabilitation, surgical treatment is considered. Tenolysis and early mobilization are the standard treatments for symptomatic tendon adhesions in the hand. Tenolysis involves surgically releasing the adhesions formed around the tendons. Follow-up rehabilitation after tendon surgical release can help reduce adhesion formation, though it does not completely prevent their formation or recurrence after tenolysis.
In recent years, many strategies have been proposed to limit adhesion formation after tendon repair surgery in the hand, or recurrence after tenolysis. Tested physical barriers include, among others, the interposition of an amniotic membrane or a composite of hyaluronic acid and methylcellulose, local application of sodium hyaluronate or various gels derived from proteoglycans or hyaluronan, or the use of non-steroidal anti-inflammatory drugs.
However, no definitive solution has yet been found, and to date, the use of anti-adhesion barriers remains limited in routine practice.
The product developed by TBF is set in this context with the goal of offering a safe biological solution that would minimize adhesion recurrence after tenolysis and promote the recovery of hand functionality.
- Conditions
- Tendon Adhesion, Tenolysis
- Being tested
- AMTRIX-D
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
AMTRIX-DBiological
Use of a decellularized, viro-inactivated, desiccated, and sterile allogeneic amniotic membrane graft to wrap a tendon after release of its adhesions.
| Study group | Role | What they receive |
|---|---|---|
| AMTRIX-D | Experimental | Surgical release of the tendon and wrapping of the released tendon with desiccated amniotic membrane (AMTRIX-D) Receives: Biological: AMTRIX-D |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change in the finger total active range of motion
Total active range of motion of the finger evaluated according to Strickland's classification: (TAM/175) × 100, where TAM = flexion of the proximal interphalangeal joint + flexion of the distal interphalangeal joint - extension deficit. Total active range of motion scores are expressed as percentages and classified into four categories: poor if < 25%, moderate from 25% to 49%, good from 50% to 74%, and excellent if > 75%. The primary objective of the study will be achieved if the total active range of motion is good or excellent (>50%) at 6 months.
Measured: 6 months
Secondary outcomes (4)
Change in the daily functionality of the finger
Daily functionality of the finger evaluated using Quick Disabilities of the Arm, Shoulder and Hand (QuickDASH) questionnaire (0 = no disability, 100 = most severe disability).
Measured: 15 days, 6 weeks, 3 months, 6 months
Change in finger pain
Pain evaluated from 0 (no pain) to 10 (worst imaginable pain) on a visual analog scale (VAS).
Measured: 15 days, 6 weeks, 3 months, 6 months
Change in hand grip strength
Grip strength measured in kg by grip strength test using a hand dynamometer.
Measured: 6 weeks, 3 months, 6 months
Frequency of occurrence of post-surgical complications
Evaluation of the frequency of occurrence of post-surgical complications and in particular rupture of the deep common flexor tendon, phlegmon, wound dehiscence.
Measured: 15 days, 6 weeks, 3 months, 6 months
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted9 Dec 2024
- Study start15 Feb 2024
- Primary completion16 Sep 2026
- Study completion16 Sep 2026
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Tendon AdhesionStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 2
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 18 participants (actual)
Sponsor and investigators
- Lead sponsor
- TBF Genie Tissulaire
- Sponsor type
- Industry (pharma, biotech, devices)
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT06723782
- Sponsor's protocol ID
- AMTRIX-Tenolyse-TBF
- Other IDs
- 2023-A01189-36
- Status last verified
- Oct 2026
- First submitted
- 4 Dec 2024
- Last updated
- 6 Oct 2026
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- No
Study at a glance
From the registry record, last updated by the sponsor on 6 Oct 2026. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Surgical Release of Hand Tendons With Wrapping of the Released Tendon Using an Amniotic Membrane
- ClinicalTrials.gov ID
- NCT06723782
- Acronym / sponsor ID
- AMTRIX-Tenolyse-TBF
- Conditions
- Tendon Adhesion, Tenolysis
- Phase
- Phase 2
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 18 participants (actual)
- Lead sponsor
- TBF Genie TissulaireIndustry (pharma, biotech, devices)
- Study start
- 15 Feb 2024 (actual)
- Primary completion
- 16 Sep 2026 (actual)
- Study completion
- 16 Sep 2026 (actual)
- First posted
- 9 Dec 2024 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
The goal of this clinical trial is to evaluate whether an amniotic membrane can function as an effective anti-adhesive barrier following surgical release of tendon adhesions. The main question the clinical trial aims to answer is:
- Can wrapping an amniotic membrane around a surgically released tendon help reduce recurrence of adhesions and promote recovery of hand functionality?
Participants will:
- Undergo surgical treatment (surgical release of the tendon adhesions and wrapping of the amniotic membrane around the release tendon) on Day 0.
- Visit the center for a series of tests 15 days, 6 weeks, 3 months, 6 months after the surgical intervention.
Detailed description
Tendon adhesions are a common problem in hand injuries and can have multiple causes. They can occur as a result of tendon damage itself or in the absence of such damage, following a fracture, crush injury, or infection. During healing, tendons become surrounded by an inflammatory exudate rich in fibrin, which can later turn into scar tissue. This scar tissue forms a strong bond between the tendon and the surrounding tissue, leading to significant functional impairment.
In their epidemiological study of 5,229 flexor tendon repairs, Dy et al. determined that 6% of patients who had undergone primary repair required a second intervention, with surgical release of adhesions around the tendons in 58% of cases. In flexor tendon repairs, adhesions are particularly promoted by damage to the tendon sheath, poor junction of the two severed ends of a lacerated tendon, or ischemia of the tendon and immobilization. Regardless of the etiology, adhesions prevent the efficient gliding of the tendon within its sheath, resulting in a discrepancy between near-normal passive range of motion and limited active range of motion.
When the range of motion deficit persists despite 6 months of high-quality rehabilitation, surgical treatment is considered. Tenolysis and early mobilization are the standard treatments for symptomatic tendon adhesions in the hand. Tenolysis involves surgically releasing the adhesions formed around the tendons. Follow-up rehabilitation after tendon surgical release can help reduce adhesion formation, though it does not completely prevent their formation or recurrence after tenolysis.
In recent years, many strategies have been proposed to limit adhesion formation after tendon repair surgery in the hand, or recurrence after tenolysis. Tested physical barriers include, among others, the interposition of an amniotic membrane or a composite of hyaluronic acid and methylcellulose, local application of sodium hyaluronate or various gels derived from proteoglycans or hyaluronan, or the use of non-steroidal anti-inflammatory drugs.
However, no definitive solution has yet been found, and to date, the use of anti-adhesion barriers remains limited in routine practice.
The product developed by TBF is set in this context with the goal of offering a safe biological solution that would minimize adhesion recurrence after tenolysis and promote the recovery of hand functionality.
Study design
- Primary purpose
- Treatment
- Allocation
- Not applicable
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 1
| Arm | Type | Receives |
|---|---|---|
| AMTRIX-D | Experimental | Biological: AMTRIX-DSurgical release of the tendon and wrapping of the released tendon with desiccated amniotic membrane (AMTRIX-D) |
Who may qualify
- Ages
- 18 to 65 years
- Sex
- All
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
Key inclusion criteria (7 listed)
- Man or woman aged 18 to 65 years old
- Adhesion of a flexor and/or extensor tendon of the hand.
- Adhesion localized to a single finger.
- Adhesion that has been present for at least 3 months following primary repair, despite high-quality rehabilitation. Primary repair is defined as the repair of a tendon injury, fracture, crush injury of the finger, infection, etc., leading to the adhesion of the tendon to surrounding tissue.
- Patient with a total passive range of motion of the proximal and distal interphalangeal joints of at least 150°.
Key exclusion criteria (9 listed)
- Pregnant or breastfeeding woman, or without an effective method of contraception.
- Patient requiring tenolysis after tendon grafting for the reconstruction of a deep common flexor or after reimplantation.
- Patient with amputated hand(s).
- Patient with an untreated fracture or non-union in the affected hand.
- Patient requiring multiple surgical interventions that may be potential confounding factors, particularly those involving additional incisions.
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| AMTRIX-DUse of a decellularized, viro-inactivated, desiccated, and sterile allogeneic amniotic membrane graft to wrap a tendon after release of its adhesions. | Biological | AMTRIX-D |
Primary outcome
Change in the finger total active range of motion
Time frame: 6 months
Total active range of motion of the finger evaluated according to Strickland's classification: (TAM/175) × 100, where TAM = flexion of the proximal interphalangeal joint + flexion of the distal interphalangeal joint - extension deficit. Total active range of motion scores are expressed as percentages and classified into four categories: poor if < 25%, moderate from 25% to 49%, good from 50% to 74%, and excellent if > 75%. The primary objective of the study will be achieved if the total active range of motion is good or excellent (>50%) at 6 months.
4 secondary outcomes
Change in the daily functionality of the finger
Time frame: 15 days, 6 weeks, 3 months, 6 months
Change in finger pain
Time frame: 15 days, 6 weeks, 3 months, 6 months
Change in hand grip strength
Time frame: 6 weeks, 3 months, 6 months
Frequency of occurrence of post-surgical complications
Time frame: 15 days, 6 weeks, 3 months, 6 months
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 6 Oct 2026.
- Individual participant dataSharing planned: No
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 2 study testing AMTRIX-D in people with Tendon Adhesion and Tenolysis, run by TBF Genie Tissulaire at 1 site in France.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 7 inclusion and 9 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 6 Oct 2026. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in France. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 2 studies give the treatment to a larger group to see whether it has the intended effect and to keep checking safety.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Change in the finger total active range of motion (time frame: 6 months). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 6 Oct 2026.