Thumb Hemi-Arthroplasty With Natural Kinematics; a Prospective Multicenter Study to Confirm the Safety and Efficacy of the InDx Implant (THANKS PRO)

Prospective, multicentric non-comparative confirmatory study to evaluate the safety and performance of the InDx CMC implant for the treatment of CMC joint arthritis.

Study Overview

• Status: Terminated
• Conditions: CMC Joint Arthritis
• Intervention / Treatment: Device: InDx CMC Implant

• Study Type: Interventional
• Enrollment (Actual): 14
• Phase: Not Applicable

Contacts and Locations

Study Locations

• Belgium
  • Bruges, Belgium, 8000
    • Az Sint-Jan Brugge Av
• Netherlands
  • Amsterdam, Netherlands, 1101GB
    • Bergman Clinics

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: No

Description

Inclusion Criteria:

• The patient is at least 18 years of age;
• The patient has a confirmed Grade I-III osteoarthritis of the CMC joint on clinical examination and X-ray;
• The patient is eligible for surgical treatment of CMC I arthrosis in the opinion of the investigator.
• The patient agrees to abstain from enrolment in any other clinical trials that will conflict or interfere with the interpretation of the results of this study, in the opinion of the Investigator, for the duration of the study;
• The patient is able to understand the aims and objectives of the trial and is willing to consent;
• The patient is willing and able to return for all study-related follow-up procedures;
• If the patient is female, is either using contraception or is postmenopausal, or male partner is using contraception

Exclusion Criteria:

• The patient is suffering from Rheumatoid arthritis in the index hand;
• The patient is suffering from Grade IV osteoarthritis of the CMC joint;
• The patient is suffering post-traumatic arthritis of the CMC joint in the index hand;
• The patient is a pregnant/lactating female (tested as per institutional requirements);
• Active or latent infection, or sepsis;
• Insufficient quantity or quality of bone and/or soft tissue in the index hand;
• Metal or polymer material sensitivity;
• Muscular imbalance, peripheral vascular disease that prohibits adequate healing, or a poor soft-tissue envelope in the surgical field, absence of musculoligamentous supporting structures, or peripheral neuropathy;
• Patient with previous thumb surgery in the index hand

• In the opinion of the investigator, any medical condition that makes the subject unsuitable for inclusion in the study, including, but not limited to

  • Patients with a diagnosis of concomitant injury that may interfere with healing
  • Patients with clinically significant renal, hepatic, cardiac, endocrine, hematologic, autoimmune, or any systemic disease or systemic infection that may make interpretation of the results difficult
• Patients who have undergone systemic administration within 30 days prior to implantation of any type of corticosteroid, antineoplastic, immunostimulating, or immunosuppressive agents
• Comorbidity that reduces life expectancy to less than 36 months

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Treatment
• Allocation: N/A
• Interventional Model: Single Group Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Device Implantation; Single arm study - Device implanted	Device: InDx CMC Implant; The InDx CMC Implant is a hemiarthroplasty device for the CMC joint which consists of a unified assembly of three components: metacarpal stem, polyethylene liner, and articulating head. Because the device functions as a hemiarthroplasty, it does not link or constrain the CMC joint

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Device Safety	Determine the incidence of device failure, encompassing mechanical malfunction, structural compromise, loss of functionality due to device failure, or any deviation from the device's intended medical purpose. This will involve monitoring for adverse events requiring total revision surgery, or premature termination of device usage due to device failure.	6 Months
Performance	Measure the improvement in hand and wrist functionality using the Disabilities of the Arm, Shoulder, and Hand (DASH) score.	12 Months
Performance	Measure the improvement in hand and wrist functionality using the Patient-Rated Wrist/Hand Evaluation (PRWHE)	12 Months

Collaborators and Investigators

• Sponsor: Loci Orthopaedics

Study record dates

Study Major Dates

• Study Start (Actual): March 19, 2025
• Primary Completion (Actual): May 20, 2026
• Study Completion (Actual): May 20, 2026

Study Registration Dates

• First Submitted: June 12, 2024
• First Submitted That Met QC Criteria: June 14, 2024
• First Posted (Actual): June 21, 2024

Study Record Updates

• Last Update Posted (Actual): July 22, 2026
• Last Update Submitted That Met QC Criteria: July 20, 2026
• Last Verified: September 1, 2025

More Information

Terms related to this study

• Additional Relevant MeSH Terms: Musculoskeletal Diseases; Joint Diseases; Arthritis
• Other Study ID Numbers: InDx03; CIV-24-03-046458 (Other Identifier: Health Products Regulatory Authority (EUDAMED ID))

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: UNDECIDED

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No