- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT03956381
Accuracy of OPS™ Femoral Neck Resection Study
September 22, 2021 updated by: Corin
A Study to Demonstrate the Accuracy of Femoral Neck Resection Compared to the Pre-operatively Selected OPS™ Plan in Total Hip Arthroplasty.
The primary objective of this study is to determine the accuracy of the Optimized Positioning System (OPS™) planning and delivery tools using different types of surgical approaches.
Study Overview
Status
Completed
Conditions
Detailed Description
Total Hip Replacement (THR) is the gold standard for treatment of severe arthritis of the hip as it relieves pain, restores function of the joint and improves quality of life for patients.
The restoration of hip mechanics can be influenced by the selected femoral stem design and also by choices made by the surgeon during the surgical implantation.
The combination of femoral neck resection level and angle are key factors, particularly in cementless hip arthroplasty, in determining post-operative leg length and femoral anteversion.
Historically, an estimation of prosthesis sizing and positioning has been made via a process of manual or digital templating either pre or intraoperatively using images of the implants positioned over the standard AP and lateral view hip x-rays taken in advance of surgery with generic instruments used during the surgery to execute the femoral head resection at the planned level.
This process has a number of limitations.
The OPS™ system utilizes detailed pre-operative imaging including a CT scan to generate a plan for the femoral neck resection level and angulation based on the anatomy of the individual patient.
Following validation of this plan by the operating clinician, a patient specific femoral guide instrument is generated to help facilitate the reliable delivery of the planned resection intraoperatively.
The purpose of this study will be to evaluate the use of the patient-specific femoral instrument in the hands of two surgeons using different prosthesis combinations and surgical approaches.
A total number of 40 participants will be enrolled.
Participants in this study will return for a single post-operative visit at 6 weeks to have X-rays taken and to enable any post-operative study hip related complications to be recorded.
Once this has been completed, participants will be routinely followed-up by their orthopaedic surgeon as required in accordance with standard clinical practice.
Study Type
Observational
Enrollment (Actual)
55
Contacts and Locations
This section provides the contact details for those conducting the study, and information on where this study is being conducted.
Study Locations
-
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Colorado
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Denver, Colorado, United States, 80210
- Colorado Joint Replacement
-
-
Participation Criteria
Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.
Eligibility Criteria
Ages Eligible for Study
19 years to 83 years (Adult, Older Adult)
Accepts Healthy Volunteers
No
Genders Eligible for Study
All
Sampling Method
Non-Probability Sample
Study Population
Study participants will be recruited from the clinic registry at each of the investigational sites of those patients requiring a primary hip replacement.
Those who meet the inclusion/exclusion criteria will be invited to enrol into the study.
Description
Inclusion Criteria:
- Patients who understand the conditions of the study and are willing to return to the clinical site at 6 weeks post-operatively.
- Patients of either gender who are between 21-85 years inclusive.
- Patients with a diagnosis of osteoarthritis, rheumatoid arthritis or osteonecrosis and are considered by the Investigator to be clinically and medically suitable to undergo a primary total hip replacement
- Patients who meet the indications and none of the contraindications listed in the Instructions for Use (IFU) supplied by the manufacturer for the femoral stem and acetabular cup to be implanted.
- Patients who meet the indications and none of the contraindications listed in the Instructions for Use (IFU) supplied by the manufacturer for OPS™ Femoral Plan and OPS™ Femoral Patient Specific Instruments.
Exclusion Criteria:
- Patients who are unable to provide informed consent.
- Patients who are unable to comply with all the required study procedures.
- Patients whose insurance will not cover the cost of the pre-operative CT and functional x-ray imaging required for use of the OPS system.
- Patients who are currently involved in any personal injury litigation, medical-legal or worker's compensations claims.
Study Plan
This section provides details of the study plan, including how the study is designed and what the study is measuring.
How is the study designed?
Design Details
- Observational Models: Cohort
- Time Perspectives: Prospective
Cohorts and Interventions
Group / Cohort |
Intervention / Treatment |
---|---|
THR with OPS system-TriFit TS/Trinity combination
Hip prosthesis combination: TriFit TS stem/ Trinity cup implanted by Surgeon 1 via a posterolateral approach according to their standard of practice.
|
The participant will undergo surgery using the hip prostheses and surgical approach used by their surgeon Investigator.
A patient specific femoral guide, generated by the OPS™ plan preoperatively, will be used during the surgical step of femoral neck resection.
These are not study specific procedures as the OPS™ system is already in use by the surgeon Investigator in their standard of practice.
|
THR with OPS system-MetaFix/Trinity combination
Hip prosthesis combination: MetaFix stem/ Trinity cup implanted by Surgeon 2 via a direct anterior approach according to their standard of practice.
|
The participant will undergo surgery using the hip prostheses and surgical approach used by their surgeon Investigator.
A patient specific femoral guide, generated by the OPS™ plan preoperatively, will be used during the surgical step of femoral neck resection.
These are not study specific procedures as the OPS™ system is already in use by the surgeon Investigator in their standard of practice.
|
What is the study measuring?
Primary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Accuracy of the final osteotomy level compared to the selected OPS™ plan preopertively.
Time Frame: 6 weeks post-op (+/- 2 weeks)
|
Accuracy of the final osteotomy level compared to the selected OPS™ plan (+ or - 3mm).
Two standard of care post-operative x-rays taken at 6 weeks will be used to evaluate the positioning of the total hip prosthesis from the resultant level of resection of the femoral neck.
This parameter will be measured in mm.
|
6 weeks post-op (+/- 2 weeks)
|
Secondary Outcome Measures
Outcome Measure |
Measure Description |
Time Frame |
---|---|---|
Comparison of the femoral stem size implanted compared to the selected OPS™ Plan preoperatively (± 1 size)
Time Frame: Immediate postoperative
|
The femoral stem size used during the operation will be compared to the selected one by the OPS™ Plan.
This parameter will be measured in units.
|
Immediate postoperative
|
Comparison of the acetabular cup size implanted compared to the selected OPS™ Plan preoperatively.
Time Frame: Immediate postoperative
|
The acetabular cup size used during the operation will be compared to the selected one by the OPS™ Plan.
This parameter will be measured in mm.
|
Immediate postoperative
|
Comparison of the femoral head size implanted compared to the selected OPS™ Plan preoperatively.
Time Frame: Immediate postoperative
|
The femoral head size used during the operation will be compared to the selected one by the OPS™ Plan.
This parameter will be measured in mm.
|
Immediate postoperative
|
Measurement of any change in Leg length/ femoral head height compared to the preoperative OPS™ Plan (± 5mm).
Time Frame: 6 weeks post-op (+/- 2 weeks)
|
The postoperative Leg length / femoral head height will be measured in mm and compared to the preoperative value.
|
6 weeks post-op (+/- 2 weeks)
|
Comparison of the acetabular cup orientation to the selected OPS™ Plan.
Time Frame: 6 weeks post-op (+/- 2 weeks)
|
The planned versus achieved acetabular cup orientation will be measured using 2D/3D registration software, in degrees.
|
6 weeks post-op (+/- 2 weeks)
|
Collaborators and Investigators
This is where you will find people and organizations involved with this study.
Sponsor
Publications and helpful links
The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.
Helpful Links
Study record dates
These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.
Study Major Dates
Study Start (Actual)
April 24, 2019
Primary Completion (Actual)
June 15, 2021
Study Completion (Actual)
July 31, 2021
Study Registration Dates
First Submitted
May 8, 2019
First Submitted That Met QC Criteria
May 17, 2019
First Posted (Actual)
May 20, 2019
Study Record Updates
Last Update Posted (Actual)
September 24, 2021
Last Update Submitted That Met QC Criteria
September 22, 2021
Last Verified
September 1, 2021
More Information
Terms related to this study
Other Study ID Numbers
- CSP2018-03
Plan for Individual participant data (IPD)
Plan to Share Individual Participant Data (IPD)?
No
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
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
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