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Feasibility Study of MID-C for AIS (MID-C)

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: NCT03071445
Recruitment Status : Completed
First Posted : March 7, 2017
Last Update Posted : March 7, 2017
Information provided by (Responsible Party):

Brief Summary:

Adolescent idiopathic scoliosis (AIS) is a common disorder of unknown etiology in which the vertebrae and discs gradually develop a curvature that is first detected in patients between 11 and 20 years of age. The deformity is 3-dimensional, with a coronal curve measured from radiographs by the Cobb angle .

The Cobb angle measurement of scoliosis represents the sum of the angular wedging of each vertebra and disc between the superior and inferior end vertebrae . Although a small curve is well tolerated and does not require treatment, a large curve can progress to the point that it is cosmetically unacceptable, interferes with chest wall mechanics, and produces cardiac and pulmonary compromises. The natural history of AIS apparently includes 2 stages: the initiation of the curve and its subsequent progression. The factors responsible for the initiation of the curve are unknown, but the subsequent progression of the curve is clearly associated with the adolescent growth spurt . The primary risk factors for progression include age at onset and the magnitude of the curve; young patients with large curves are at the highest risk .

Although numerous treatment methods have been recommended for patients with AIS, the only accepted treatment includes bracing for skeletally immature patients with curves between 25 and 40 degrees and operative correction with spinal fusion for patients with curves greater than 45 degrees. For many teenagers, the cosmetic and social concerns associated with bracing has caused compliance problems with wearing the brace and many patients only wear the brace at home . While operative intervention completely corrects the scoliosis or rib hump, it eliminates segmental spinal motion, and concentrates stresses at the ends of the fusion potentially leading to disc degeneration and back pain.

Despite satisfactory short-term results of operative instrumentation and fusion, a less invasive technique preserving more motion with a smaller scar represents a major improvement. Realizing this goal is contingent on treating curves early, before they progress to an irreversible deformity, and when there is still enough residual growth and remodeling potential.

ApiFix Ltd has developed a novel implant for less invasive treatment of AIS. The MID-C system is designed to correct the deformity step by step along a period of time, giving the skeletal and soft tissues time to accommodate any incremental correction.

The MID-C System inherent benefits are:

  • Only two screws are used
  • Incision size is much smaller
  • Simpler operation with shorter operative time
  • Less complications (attributed to the three points above).
  • Minimal spinal mobility loss.

All the device components are made of materials well accepted in the orthopedic field and are fully biocompatible (see Investigator Brochure).

The unique concept of the system and the materials used may provide favorable results as follows: Smaller scare, quicker healing period and better spine mobility over the years.

This study is designed to demonstrate that the MID-C System is safe and effective.

Condition or disease
Adolescent Idiopathic Scoliosis (AIS)

Detailed Description:
The study is designed as an observational study with a 24-month follow-up period. Consecutive patients undergoing treatment of AIS by the MID-C system in daily practice will be included during a 1-year enrollment period.

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Study Type : Observational [Patient Registry]
Actual Enrollment : 13 participants
Observational Model: Cohort
Time Perspective: Prospective
Target Follow-Up Duration: 2 Years
Official Title: Safety and Effectiveness Evaluation of the Minimal Invasive Deformity Correction (MID-C) System in Adolescent Idiopathic Scoliosis (AIS)
Actual Study Start Date : April 2012
Actual Primary Completion Date : April 2016
Actual Study Completion Date : April 2016

Resource links provided by the National Library of Medicine

MedlinePlus related topics: Scoliosis

Primary Outcome Measures :
  1. No Device related Serious Adverse Event [ Time Frame: 2 years ]
  2. No significant curve progression above or below the implant [ Time Frame: 6 months, 1 year, 2 years ]

Secondary Outcome Measures :
  1. Minimum of 50% deformity correction within 6 months [ Time Frame: 6 months ]
  2. Evaluate the correction period using X-ray [ Time Frame: 2 years ]

Information from the National Library of Medicine

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.

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Ages Eligible for Study:   11 Years to 20 Years   (Child, Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
The study is designed as a prospective, non randomized, open label study with a 24-month follow-up period. Consecutive patients undergoing treatment of AIS by the MID-C system will be included during a 1-years enrollment period.

Inclusion Criteria:

  1. Adolescence above and inclusive 11 years old
  2. Minimum of 35 degrees Cobb angle, confirmed by X-ray. Lenke type 1 or 5
  3. Completed at least 6 months of conservative therapy (e.g., P.T., bracing, traction, or others).
  4. Reisser sign of 2 to 4
  5. Appropriate candidate for posterior surgical approach
  6. Subject has Good general health.
  7. Subject has no hypersensitivity and allergies to Titanium
  8. Subject guardians willing to sign a written informed consent form (ICF).surgeon

Exclusion Criteria:

  1. Cobb angle over 55 degrees
  2. Other non idiopathic scoliosis.
  3. AIS which is not defined as Lenke type 1 or 5
  4. Previous spine surgery.
  5. Allergy to any component of the device.
  6. Active systemic disease, such as AIDS, HIV, or active infection
  7. Back or leg pain of unknown etiology
  8. Systemic disease that would affect the subject's welfare or overall outcome of the study.
  9. Mentally compromised

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT03071445

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University of Pecs
Pecs, Hungary, H-7632
Maria Sklodowska Curie
Bucharest, Romania
Spitalul de Copii Sf. Maria
Iasi, Romania
Sponsors and Collaborators
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Principal Investigator: Sergiu Straticiuc-ciongradi, MD Spitalul de Copii Sf. Maria Lasi
Principal Investigator: Peter Than, MD University of Pecs Medical School Hungary
Principal Investigator: Gheorghe Burnei, MD, PhD Maria Sklodowska Curie, Bucharest

Additional Information:

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Responsible Party: Apifix Identifier: NCT03071445     History of Changes
Other Study ID Numbers: AF-01
First Posted: March 7, 2017    Key Record Dates
Last Update Posted: March 7, 2017
Last Verified: February 2017
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: No

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Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: No

Additional relevant MeSH terms:
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Spinal Curvatures
Spinal Diseases
Bone Diseases
Musculoskeletal Diseases