An interventional study of Total Hip Arthroplasty with G7 Freedom Constrained Vivacit-E Liners in Osteoarthritis, Hip, Rheumatoid Arthritis and Non-Union Fracture, sponsored by Zimmer Biomet. Enrolling by invitation at 10 sites in United States. Open to participants aged 18 Years to 80 Years. Per ClinicalTrials.gov, last updated 2025-10-20.
Sponsored by Zimmer Biomet · Not applicable, Interventional, and Treatment
The main objectives of this study are to confirm the long-term safety, performance, and clinical benefits of the G7 Freedom Constrained Vivacit-E Acetabular Liners in primary and revision total hip arthroplasty.
The main objectives of this study are to confirm the long-term safety, performance, and clinical benefits of the G7 Freedom Constrained Vivacit-E Acetabular Liners in primary and revision total hip arthroplasty.
The primary endpoint is defined by the survival of the implant system at 10 years, which is based on removal of the study device and will be determined using the Kaplan-Meier method. The safety of the system will be assessed by monitoring the frequency and incidence of adverse events. Relation of the events to the implant, instrumentation and/or procedure should be specified.
The secondary endpoints are the assessment of performance and clinical benefits by recording patient-reported clinical outcomes measures (PROMs) as well as radiographic outcomes (if available).
The G7 Vivacit-E Freedom Constrained Liner is indicated for use (per IFU) as a component of a total hip prosthesis in primary and revision patients at high risk of dislocation due to a history of prior dislocation, bone loss, joint or soft tissue laxity, neuromuscular disease, or intraoperative instability, and for whom all other options to constrained acetabular components have been considered.
641 studies on the registry are indexed under Osteoarthritis, Hip; 120 are open to participants now.
This study's planned enrollment of 202 is above the median of 90 across 457 interventional studies indexed under Osteoarthritis, Hip.
Browse Osteoarthritis, Hip studies →Zimmer Biomet is the lead sponsor of 275 studies on the registry; 28 are open to participants now.
Of its 22 completed or terminated interventional studies of FDA-regulated products, 19 (86%) have results posted.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Patient qualifies for unilateral total hip arthroplasty based on physical exam and medical history including at least one of the following:
Exclusion Criteria:
The patient is in the vulnerable population group, such as
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Informed consent
Before you join, the study team explains what taking part involves — its purpose, what happens, the risks and possible benefits — and answers your questions, so you can decide freely. Consent is usually recorded on a form (the informed consent form, ICF) signed by you or, where the law allows, by someone legally authorised to decide for you.
You can keep asking questions during the study, you are told of new information that matters, and you can choose to leave at any time.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
This study will enroll (implant) up to 202 hips in total according to the IFU and surgical technique. Of these, up to 135 will be revision hips and up to 67 will be primary hips. This is a dual cohort study (primary and revision); each subject will receive the G7 Acetabular System with the Freedom Constrained Vivacit-E bearing. To minimize potential bias and to maximize our ability to assess inter-site differences, each study site will target up to 27 primary hip arthroplasties and up to 54 revision hip arthroplasties (not exceed 81 implanted hips or 40% of total study population). Each site is encouraged to enroll (implant) both primary and revision subjects.
Device: Total Hip Arthroplasty with G7 Freedom Constrained Vivacit-E Liners
Primary and/or Revision total hip arthroplasty with the G7 Freedom Constrained Vivacit-E Liners
Survival of the study device
Survival (whether or not it is still implanted in the subject) determined using Kaplan Meier method.
Time frame: 10 years
Incidence of treatment-emergent Adverse Events (safety)
Safety is assessed by monitoring the frequency and incidence of all adverse events, with particular focus on those that may be related to the study device.
Time frame: 10 years
Pain and Functional Performance - Modified Harris Hip Score
The Harris Hip Score evaluates hip function, pain, mobility and daily activity impairment after hip replacement surgery. The ten items in the Harris hip score consist of answer choices, awarded a number of points. There are four domains evaluated, as follows: * Pain - 1 item which scores between 0 and 44; * Function - 7 items, scores are between 0 and 47; * Deformity - 1 item which scores either 0 or 4; * Range of motion - 1 item which scores between 0 and 5. The overall score varies between 0 and 100, where scores closer to 0 are suggestive of impaired hip function and scores closer to 100 indicate positive outcome. There are four categories of hip function status: * \<70: poor hip status; * 70 - 79: fair hip status; * 80 - 89: good hip status; * 90 - 100: excellent hip status.
Time frame: 10 years
Pain and Functional Performance - Oxford Hip Score
"The Oxford Hip Score is patient-reported outcome instrument which contains 12 questions on activities of daily living that assess function and residual pain in patients undergoing total hip replacement surgery. Grading the Oxford Hip Score 0 to 19-May indicate severe hip arthritis... 20 to 29-May indicate moderate to severe hip arthritis... 30 to 39-May indicate mild to moderate hip arthritis... 40 to 48-May indicate satisfactory joint function..." Oxford Hip Score. (n.d.) Segen's Medical Dictionary. (2011). Retrieved August 19 2022 from https://medical-dictionary.thefreedictionary.com/Oxford+Hip+Score Each question is scored from 0 to 4 with 4 being the best outcome. This method, when summed, produces overall scores running from 0 to 48 with 48 being the best outcome. The overall score is reached by simply summing the scores received for individual questions. This results in a continuous score ranging from 0 (most severe symptoms) to 48 (least symptoms).
Time frame: 10 years
Euroqol Patient Quality of life measured at 2 years follow-up (EQ-5D-5L)
The EuroQol five dimensions questionnaire (EQ-5D-5L) is a five dimensional self-assessment that is comprised of mobility, self-care, usual activities, pain/discomfort, and anxiety/depression. These five dimensions can be used to index a subject's health utility on a scale of 0 to 1, where 0 is death and 1 is perfect health. The scoring rule for EQ-5D permits scores less than 0, implying that some health states may be worse than death. Note: no VAS measures will be obtained if completed by phone interview.
Time frame: 10 Years
Radiographic Performance evaluating radiolucency at 5 years follow-up
X-rays will be evaluated for radiolucency lines to show the number of subjects with radiolucency. Radiolucency refers to structures that are less dense and permit the x-ray beam to pass through them. Radiolucent structures appear dark or black in the radiographic image.
Time frame: 5 Years
Radiographic Performance evaluating osteolysis at 5 years follow-up
X-rays will be evaluated for osteolysis to show the number of subjects with osteolysis. Osteolysis is a progressive condition where bone tissue is destroyed. In this process, bones lose minerals (mostly calcium), softens, degenerates and become weaker.
Time frame: 5 Years
Radiographic Performance evaluating atrophy/hypertrophy at 5 years follow-up
X-rays will be evaluated for muscular atrophy/hypertrophy. An increase in total mass of a muscle is referred to as as hypertrophy, whereas a decrease in total mass of a muscle is referred to as atrophy.
Time frame: 5 Years
Radiographic Performance evaluating component migration at 5 years follow-up
X-rays will be evaluated for component migration to show the number of subjects with migration. Component migration refers to the presence of the device component gradually moving anteriorly, posteriorly, superiorly, or inferiorly in relation to original placement.
Time frame: 5 Years
Radiographic Performance evaluating device fracture at 5 years follow-up
Radiographs will be evaluated (up to 5 years) for evidence of device fracture.
Time frame: 5 Years
Radiographic Performance evaluating heterotopic ossification at 5 years follow-up
X-rays will be evaluated for heterotopic ossification to show the number of subjects with heterotopic ossification. Heterotopic ossification refers to the presence of bone in soft tissue where bone normally does not exist (extraskeletal bone).
Time frame: 5 Years
Plan to share: No
No publications or documents are linked to this record.
Eligibility is decided by the study team. Share this record with your doctor or contact the team directly.
No contact was published for this record. The registry link below has the sponsor’s details.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.