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A Prospective, Multicenter Study to Evaluate the ConforMIS iTotal® (CR) Knee Replacement System

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: NCT01820650
Recruitment Status : Active, not recruiting
First Posted : March 29, 2013
Last Update Posted : November 2, 2018
Information provided by (Responsible Party):
ConforMIS, Inc.

Tracking Information
First Submitted Date March 26, 2013
First Posted Date March 29, 2013
Last Update Posted Date November 2, 2018
Actual Study Start Date February 2013
Actual Primary Completion Date March 2017   (Final data collection date for primary outcome measure)
Current Primary Outcome Measures
 (submitted: March 26, 2013)
2011 Knee Society Score [ Time Frame: 1 Year ]
Original Primary Outcome Measures Same as current
Change History
Current Secondary Outcome Measures Not Provided
Original Secondary Outcome Measures Not Provided
Current Other Pre-specified Outcome Measures Not Provided
Original Other Pre-specified Outcome Measures Not Provided
Descriptive Information
Brief Title A Prospective, Multicenter Study to Evaluate the ConforMIS iTotal® (CR) Knee Replacement System
Official Title A Prospective, Multicenter Study to Evaluate the ConforMIS iTotal® (CR) Knee Replacement System
Brief Summary This study is designed to observe the long term clinical outcomes of patient-specific knee arthroplasty in patients with osteoarthritis.
Detailed Description If the patient has previously received a standard total knee replacement in their contralateral knee, the primary endpoint questionnaire and some secondary endpoint questionnaires will be completed regarding BOTH their iTotal® CR knee and their standard total knee for all time points where questionnaires are required by the protocol.
Study Type Observational
Study Design Observational Model: Cohort
Time Perspective: Prospective
Target Follow-Up Duration Not Provided
Biospecimen Not Provided
Sampling Method Non-Probability Sample
Study Population Patients with osteoarthritis of the knee
Condition Osteoarthritis of the Knee
Intervention Device: iTotal G2 CR Knee Replacement System
Total Knee replacement
Study Groups/Cohorts Not Provided
Publications * Not Provided

*   Includes publications given by the data provider as well as publications identified by Identifier (NCT Number) in Medline.
Recruitment Information
Recruitment Status Active, not recruiting
Actual Enrollment
 (submitted: May 12, 2016)
Original Estimated Enrollment
 (submitted: March 26, 2013)
Estimated Study Completion Date March 2026
Actual Primary Completion Date March 2017   (Final data collection date for primary outcome measure)
Eligibility Criteria

Inclusion Criteria:

  • Clinical condition included in the approved Indications For Use for the iTotal® CR
  • Osteoarthritis, as confirmed by the investigator's assessment of disease status at screening visit that warrants a TKR procedure. Disease status is assessed by Clinical and Radiographic assessment.
  • Willingness to participate in the clinical study, to give informed consent and to attend all follow-up visits
  • > 18 years of age

Exclusion Criteria:

  • Simultaneous bilateral procedure required
  • BMI > 40
  • Active malignancy (defined as a history of any invasive malignancy - except non-melanoma skin cancer), unless patient has been treated with curative intent and there have been no clinical signs or symptoms of the malignancy for at least 5 years
  • Poorly Controlled diabetes
  • Neuromuscular conditions which prevent patient from participating in study activities
  • Active local or systemic infection
  • Immunocompromised
  • Fibromyalgia or other general body pain related condition
  • Rheumatoid arthritis or other forms of inflammatory joint disease
  • Loss of bone or musculature, osteonecrosis, neuromuscular or vascular compromise in the area of the joint to be operated to an extent that the procedure is unjustified
  • Diagnosed with or receiving treatment for Osteoporosis
  • Other physical disability affecting the hips, spine, or contralateral knee.
  • Severe instability due to advanced loss of osteochondral structure
  • Prior arthroplasty of the affected knee, including High Tibial Osteotomy (HTO)
  • Compromised PCL or collateral ligament
  • Severe fixed valgus or varus deformity of >15º
  • Extensor lag > 15 º
  • Fixed flexion contracture ≥ 15 º
  • Unwilling or unable to comply with study requirements
  • Participation in another clinical study which would confound results
  • Allergy to any of the implant materials
Sexes Eligible for Study: All
Ages 18 Years and older   (Adult, Older Adult)
Accepts Healthy Volunteers No
Contacts Contact information is only displayed when the study is recruiting subjects
Listed Location Countries United States
Removed Location Countries  
Administrative Information
NCT Number NCT01820650
Other Study ID Numbers 12-001
Has Data Monitoring Committee No
U.S. FDA-regulated Product
Studies a U.S. FDA-regulated Drug Product: No
Studies a U.S. FDA-regulated Device Product: Yes
Product Manufactured in and Exported from the U.S.: Yes
IPD Sharing Statement
Plan to Share IPD: No
Responsible Party ConforMIS, Inc.
Study Sponsor ConforMIS, Inc.
Collaborators Not Provided
Study Director: Marc Quartulli ConforMIS, Inc.
Principal Investigator: Terry Clyburn, MD The University of Texas Health Science Center, Houston
PRS Account ConforMIS, Inc.
Verification Date November 2018