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Active, Not Recruiting

NCT Number: NCT04122248

M6-C Post Approval Study (PAS)

The M6-C Post Approval Study is a long term follow-up study of subjects previously enrolled and treated in the M6-C Artificial Cervical Disc IDE Study.

Active, Not Recruiting

This study is active but is not currently recruiting participants.

Key information

Conditions

Cervical Degenerative Disc Disease Cervical Disc Herniation Cervical Radiculopathy Cervical Spinal Cord Compression Nervous System Diseases Neuromuscular Diseases Peripheral Nervous System Diseases Radiculopathy

Age range

21 year–68 year

Sex eligibility

All sexes

Study type

Observational

Primary location

Desert Institute for Spine Care, Phoenix, Arizona, United States

Loading trial locations.

About this study

A prospective, concurrently controlled, multi-center pivotal study to evaluate the safety and effectiveness of the M6-C™ Artificial Cervical Disc compared to anterior cervical discectomy and fusion (ACDF) was performed in the United States under IDE #G050254. To fulfill the concurrent control design of the study, there were clinical sites that evaluated the safety and effectiveness of the M6-C™ Artificial Cervical Disc and there were other clinical sites that evaluated ACDF. Subjects in the study were treated between May 2014 and June 2016 and remain in follow-up. The M6-C™ Artificial Cervical Disc received FDA approval to market on February 6, 2019. As a condition of approval, the FDA requested that the sponsor perform a post market approval study (PAS). The subjects enrolled and remaining in the M6-C IDE pivotal study are the prospective patient population for the PAS.

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

  • Since the subjects have already been screened as part of the IDE's pivotal study, and only subjects that participated in that study make up the subject cohort for this long-term follow-up study, there are no additional inclusion criteria

Exclusion criteria

  • Subjects who were withdrawn or withdrew consent to participate in the investigation
  • Subjects who do not consent to participate in long-term follow-up or provide personal contact information to the sponsor (solely for the purposes of tracking subjects to help ensure follow-up compliance)
  • Patients with terminal failures (SSI or device- or procedure-related SAE) by Month 24 and all known patient deaths in the M6-C IDE study are excluded for enrollment into the PAS

Treatment and study plan

standard radiographic imaging

Other

standard radiographic imaging

cervical total disc replacement

Device

Artificial disc replacement (ADR) in the cervical spine is a minimally invasive procedure that involves removing diseased disc tissue and replacing it with an artificial disc. The artificial disc is designed to preserve the spine's natural motion while remaining securely attached to the surrounding vertebral bones. The goal of ADR is to help preserve the motion of the cervical spine or spinal segment after surgery, which can improve the quality of life for patients.

Other names: cervical disc arthroplasty, cervical artificial disc replacement

Primary outcomes

  1. Overall subject success

    Time frame: 10 year follow-up

    A study subject will be considered an overall success if he/she meets the following criteria:

    • No serious adverse event(s) classified as device or device procedure related (as determined by the CEC), and
    • No subsequent surgical procedure at the index level (including revision, removal, reoperation, or supplemental fixation), and
    • Maintenance or improvement in neurological function, and
    • Improvement on the NDI of at least 15 points.

Secondary outcomes

  1. Neck Disability Index (NDI)

    Time frame: annually to 10 years

    The NDI is a patient reported outcome questionnaire for the measurement of pain and function related to cervical spine problems. A total NDI score is determined by adding the scores of the individual questions and dividing that total by the maximum possible score (i.e., 50 if all questions are answered) to yield a percentage. Therefore, the NDI score ranges from 0% to 100%. A lower score represents less pain and dysfunction.

  2. Neck and arm pain

    Time frame: annually to 10 years

    A visual analogue scale is a patient reported outcome measure utilized to determine neck and arm pain on a zero to ten scale with zero being the least amount of pain and 10 the most possible pain.

  3. SF-36 Health Survey

    Time frame: annually to 10 years

    The SF-36 is a patient reported outcome questionnaire to measure health-related Quality of Life. An increase in score from baseline represents an improvement in health.

  4. Patient Satisfaction

    Time frame: annually to 10 years

    The following 5 point Likert Scale will be used to further assess subject satisfaction:

    • How satisfied are you with the results of your surgery? Very Satisfied; Satisfied; Neutral; Unsatisfied; Very Unsatisfied
    • All things considered, would you have the surgery again? Very likely; likely; not sure; Unlikely; Very Unlikely
    • Would you recommend the surgery to a friend or family member? Very likely; likely; not sure; Unlikely; Very Unlikely

  5. Odom's Criteria

    Time frame: annually to 10 years

    At the 5, 7 and 10 year follow-up visits, the Investigator will rate the clinical disposition of each study subject according to Odom's Criteria[18] as follows:

    Excellent: No symptoms related to cervical disease. Able to perform daily activities without limitations.

    Good: Moderate symptoms related to cervical disease. Able to perform daily activities without significant limitations.

    Satisfactory: Slight improvement is symptoms related to cervical disease. Significant limitations in daily activities.

    Poor: No improvement in, or aggravation of, symptoms related to cervical disease. Not able to perform daily activities.

Sponsors and collaborators

Lead sponsor

Spinal Kinetics

Industry

Registry information

Official study title

M6-C Artificial Cervical Disc IDE Post Approval Study

Important dates

Study start
2019
Primary completion
2026
Study completion
2026
First posted
Oct 10, 2019
Registry last updated
Jul 30, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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