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Clinical Trial Details — Status: Recruiting

Administrative data

NCT number NCT04728542
Other study ID # CLIN-G-010
Secondary ID 2019-14580
Status Recruiting
Phase
First received
Last updated
Start date March 25, 2021
Est. completion date November 2024

Study information

Verified date August 2021
Source Symbios Orthopedie SA
Contact Lukas Eckhard
Phone +49 6131-177302
Email Lukas.Eckhard@unimedizin-mainz.de
Is FDA regulated No
Health authority
Study type Observational

Clinical Trial Summary

The study objective is to assess patient satisfaction after the surgery with a custom-made CE marked implant (ORIGIN®) versus off-the-shelf (VANGUARD PS) device, and to document the clinical and device performance outcomes of the ORIGIN System used in routine hospital practice in a large patient cohort treatment of total knee arthroplasty. The hypothesis is that patients receiving ORIGIN implants will experience a more natural feel of the prosthesis during the first year after the surgery compared to patients receiving VANGUARD implants (as measured with FJS), and slightly significant improvement at the following interval of 2 years. The overall patient satisfaction is expected to be improved after 2 years follow-up. It is also supposed that the overall patient satisfaction is expected to be higher with ORIGIN PS than with VANGUARD PS treatment.


Description:

ORIGIN® PS and VANGUARD® PS are total knee prostheses, intended to be used in primary Total Knee Replacement Arthroplasty (TKA). With the ORIGIN® PS implant being customized individually made (CIM) fitting a patient's anatomy, a more natural reconstruction of knee kinematics is anticipated and ultimately a higher patient satisfaction and lower revision rate are envisioned. To date literature providing data about CIM TKA is still scarce. A study assessing kinematics after TKA found that CIM TKA more closely resembled natural knee kinematics when compared to standard off-the-shelf (OTS) TKA. This resemblance allows for a more natural femoral rollback during knee flexion, the authors found. CIM TKA demonstrates knee kinematics more similar to a normal knee studying tibiofemoral kinematics using mobile fluoroscopy in vivo. Furthermore, CIM TKA has shown to provide a more accurate tibial fit and rotation, when compared to several standard TKA. A retrospective review of 621 TKA patients, 307 with CIM TKA and 314 with conventional implants, demonstrated a decreased estimated blood loss, decreased length of stay, decreased range of motion, and no discernible difference in surgical or tourniquet time. Albeit, the differences found were not deemed clinically relevant, the study underlined the safety and efficacy of the CIM TKA technique. Patients who received CIM TKA had lower transfusion rates and fewer adverse events. Four year data from the UK National Joint Registry showed a cumulative percent revision rate of 0.5% for CIM TKA versus a cumulative percent revision rate of 1.9% for all TKA. While all this data is encouraging, randomized controlled studies and assessments of patient reported outcomes are missing. Therefore, the current study aims to close this knowledge gap and provide Level I evidence for CIM TKA by comparing the two TKA Prostheses mentioned above and to evaluate their clinical performance and safety. This is a prospective, comparative, randomized, double arm, monocentric, observational, post-market study. The study is performed in Germany, in the University Medical Center of Johannes Gutenberg-University Mainz (UMC-Mainz). It is stated that 140 subjects implanted with either the ORIGIN PS or VANGUARD PS System will be included upon eligibility assessment. Subjects will be followed at one and two years after the procedure. Enrollment will occur at the time of the medical examination. It is assumed that the subjects' treatments and follow-up visits will be performed per standard of the investigational site in Germany. It is anticipated that enrollment will take approximately 18 months. As each implanted subject is to be followed for two years, the estimated study duration is approximately 48 months, excluding the time required for preparing the final report. (A loss of approximately 10% is expected at the end of the study)


Recruitment information / eligibility

Status Recruiting
Enrollment 140
Est. completion date November 2024
Est. primary completion date August 2024
Accepts healthy volunteers No
Gender All
Age group 18 Years and older
Eligibility Inclusion Criteria: - Male and female over 18 years of age - Each patient, or his or her guardian or legal representative, is willing to give informed consent. - Clinically indicated for a total Knee replacement - Females who are not pregnant or lactating and not planning to become pregnant = 12 months. A pregnancy test may be performed to confirm this. - Geographically stable and willing to return to the implanting site for all follow-up visits at 1 year and 2 years. Exclusion Criteria: - Life expectancy = 1 year - Age = 80 years - Acute or chronic, local or systemic infection - Mental illness - Muscular, ligamental, neurological, psychological or vascular deficits - Bone destruction or poor bone quality likely to affect implant stability (requiring a femoral and/or a tibial stem and/or a thick insert) - Any concomitant condition likely to affect implant integration or function - Allergy or hypersensitivity to any of the materials used - For devices in CoCrMo (ISO 5832/4): renal and hepatic impairment - Hip Knee Ankle (HKA) angle < 165° or > 195°

Study Design


Related Conditions & MeSH terms


Intervention

Device:
ORIGIN PS System
Group of 70 subjects who will undergo a surgery with the ORIGIN PS System
VANGUARD PS System
Group of 70 subjects who will undergo a surgery with the VANGUARD System

Locations

Country Name City State
Germany Lukas Eckhard Mainz

Sponsors (1)

Lead Sponsor Collaborator
Symbios Orthopedie SA

Country where clinical trial is conducted

Germany, 

References & Publications (10)

Behrend H, Giesinger K, Giesinger JM, Kuster MS. The "forgotten joint" as the ultimate goal in joint arthroplasty: validation of a new patient-reported outcome measure. J Arthroplasty. 2012 Mar;27(3):430-436.e1. doi: 10.1016/j.arth.2011.06.035. Epub 2011 Oct 13. — View Citation

Carlson VR, Post ZD, Orozco FR, Davis DM, Lutz RW, Ong AC. When Does the Knee Feel Normal Again: A Cross-Sectional Study Assessing the Forgotten Joint Score in Patients After Total Knee Arthroplasty. J Arthroplasty. 2018 Mar;33(3):700-703. doi: 10.1016/j.arth.2017.09.063. Epub 2017 Oct 7. — View Citation

Giesinger K, Hamilton DF, Jost B, Holzner B, Giesinger JM. Comparative responsiveness of outcome measures for total knee arthroplasty. Osteoarthritis Cartilage. 2014 Feb;22(2):184-9. doi: 10.1016/j.joca.2013.11.001. Epub 2013 Nov 18. — View Citation

Hamilton DF, Loth FL, Giesinger JM, Giesinger K, MacDonald DJ, Patton JT, Simpson AH, Howie CR. Validation of the English language Forgotten Joint Score-12 as an outcome measure for total hip and knee arthroplasty in a British population. Bone Joint J. 2017 Feb;99-B(2):218-224. doi: 10.1302/0301-620X.99B2.BJJ-2016-0606.R1. — View Citation

Kahlenberg CA, Lyman S, Joseph AD, Chiu YF, Padgett DE. Comparison of patient-reported outcomes based on implant brand in total knee arthroplasty: a prospective cohort study. Bone Joint J. 2019 Jul;101-B(7_Supple_C):48-54. doi: 10.1302/0301-620X.101B7.BJJ-2018-1382.R1. — View Citation

Thienpont E, Opsomer G, Koninckx A, Houssiau F. Joint awareness in different types of knee arthroplasty evaluated with the Forgotten Joint score. J Arthroplasty. 2014 Jan;29(1):48-51. doi: 10.1016/j.arth.2013.04.024. Epub 2013 May 18. — View Citation

Thompson SM, Salmon LJ, Webb JM, Pinczewski LA, Roe JP. Construct Validity and Test Re-Test Reliability of the Forgotten Joint Score. J Arthroplasty. 2015 Nov;30(11):1902-5. doi: 10.1016/j.arth.2015.05.001. Epub 2015 May 13. — View Citation

Thomsen MG, Latifi R, Kallemose T, Husted H, Troelsen A. Does knee awareness differ between different knee arthroplasty prostheses? A matched, case-control, cross-sectional study. BMC Musculoskelet Disord. 2016 Apr 1;17:141. doi: 10.1186/s12891-016-1001-3. — View Citation

Wheatley B, Nappo K, Fisch J, Rego L, Shay M, Cannova C. Early outcomes of patient-specific posterior stabilized total knee arthroplasty implants. J Orthop. 2018 Dec 6;16(1):14-18. doi: 10.1016/j.jor.2018.11.003. eCollection 2019 Jan-Feb. — View Citation

Young SW, Walker ML, Bayan A, Briant-Evans T, Pavlou P, Farrington B. The Chitranjan S. Ranawat Award : No Difference in 2-year Functional Outcomes Using Kinematic versus Mechanical Alignment in TKA: A Randomized Controlled Clinical Trial. Clin Orthop Relat Res. 2017 Jan;475(1):9-20. doi: 10.1007/s11999-016-4844-x. — View Citation

Outcome

Type Measure Description Time frame Safety issue
Primary Forgotten Joint Score The Forgotten Joint Score is a joint-specific questionnaire is defined in 12 questions and measure the ability of the patient to forget their operated knee after the surgery.
The outcome Score is between 0-4. Zero is best outcome. Low score means high satisfaction.
All responses are summed and multiplied by 25 (Total= 0-100)
Baseline (preoperative visit)
Primary Forgotten Joint Score The Forgotten Joint Score is a joint-specific questionnaire is defined in 12 questions and measure the ability of the patient to forget their operated knee after the surgery.
The outcome Score is between 0-4. Zero is best outcome. Low score means high satisfaction.
All responses are summed and multiplied by 25 (Total= 0-100)
1 year
Primary Forgotten Joint Score The Forgotten Joint Score is a joint-specific questionnaire is defined in 12 questions and measure the ability of the patient to forget their operated knee after the surgery.
The outcome Score is between 0-4. Zero is best outcome. Low score means high satisfaction.
All responses are summed and multiplied by 25 (Total= 0-100)
2 years
Primary The Self-Administered Patient Satisfaction Scale The Self-Administered Patient Satisfaction Scale (SAPS) is defined in 4 questions and measure the patient satisfaction regarding the surgery with a CE marked custom-made implant (ORIGIN®) versus off-the-shelf (VANGUARD PS) device.
The items include patients' overall satisfaction with surgery, the extent of pain relief, the ability to perform home or yard work, and the ability to perform recreational activities.
Items are scored on a 4-point Likert scale with response categories consisting of very satisfied (100 points), somewhat satisfied (75 points), somewhat dissatisfied (50 points), and very dissatisfied (25 points). The scale score is the unweighted mean of the scores from the individual items, ranging from 25 to 100 per item (with 100 being most satisfied).
Baseline (preoperative visit)
Primary The Self-Administered Patient Satisfaction Scale The Self-Administered Patient Satisfaction Scale (SAPS) is defined in 4 questions and measure the patient satisfaction regarding the surgery with a CE marked custom-made implant (ORIGIN®) versus off-the-shelf (VANGUARD PS) device.
The items include patients' overall satisfaction with surgery, the extent of pain relief, the ability to perform home or yard work, and the ability to perform recreational activities.
Items are scored on a 4-point Likert scale with response categories consisting of very satisfied (100 points), somewhat satisfied (75 points), somewhat dissatisfied (50 points), and very dissatisfied (25 points). The scale score is the unweighted mean of the scores from the individual items, ranging from 25 to 100 per item (with 100 being most satisfied).
1 year
Primary The Self-Administered Patient Satisfaction Scale The Self-Administered Patient Satisfaction Scale (SAPS) is defined in 4 questions and measure the patient satisfaction regarding the surgery with a CE marked custom-made implant (ORIGIN®) versus off-the-shelf (VANGUARD PS) device.
The items include patients' overall satisfaction with surgery, the extent of pain relief, the ability to perform home or yard work, and the ability to perform recreational activities.
Items are scored on a 4-point Likert scale with response categories consisting of very satisfied (100 points), somewhat satisfied (75 points), somewhat dissatisfied (50 points), and very dissatisfied (25 points). The scale score is the unweighted mean of the scores from the individual items, ranging from 25 to 100 per item (with 100 being most satisfied).
2 years
Secondary Knee Injury and Osteoarthritis Outcome Score The Knee Injury and Osteoarthritis Outcome (KOOS) Score is defined in 5 subscales (1.Pain, 2.other Symptoms, 3.Function in daily living (ADL), 4.Function in sport and recreation, and 5.knee related to Quality of life.
Items are scored on 4-points Likert scale. The scale score is the unweighted mean of the scores, ranging from 0 to 100 per item (with 100 indicating no symptoms and 0 indicating extreme symptoms).
Baseline (preoperative visit)
Secondary Knee Injury and Osteoarthritis Outcome Score The Knee Injury and Osteoarthritis Outcome (KOOS) Score is defined in 5 subscales (1.Pain, 2.other Symptoms, 3.Function in daily living (ADL), 4.Function in sport and recreation, and 5.knee related to Quality of life.
Items are scored on 4-points Likert scale. The scale score is the unweighted mean of the scores, ranging from 0 to 100 per item (with 100 indicating no symptoms and 0 indicating extreme symptoms).
1 year
Secondary Knee Injury and Osteoarthritis Outcome Score The Knee Injury and Osteoarthritis Outcome (KOOS) Score is defined in 5 subscales (1.Pain, 2.other Symptoms, 3.Function in daily living (ADL), 4.Function in sport and recreation, and 5.knee related to Quality of life.
Items are scored on 4-points Likert scale. The scale score is the unweighted mean of the scores, ranging from 0 to 100 per item (with 100 indicating no symptoms and 0 indicating extreme symptoms).
2 years
Secondary Complications & revision rate Pourcentage of complications leading to surgical revision Baseline (surgery)
Secondary Complications & revision rate Pourcentage of complications leading to surgical revision 1 year
Secondary Complications & revision rate Pourcentage of complications leading to surgical revision 2 years
Secondary Oxford Knee Score The Oxford Knee Score (OKS) is 12-items questionnaire designed and developed to assess function and pain after total knee replacement surgery (arthroplasty).
The Items are scored on a 4-point Likert scale. The scale score is the unweighted mean of the scores, ranging from 0 to 48 (with 48 indicating best/least problems and 0 indicating worst/most severe problems).
baseline (preoperative visit)
Secondary Oxford Knee Score The Oxford Knee Score (OKS) is 12-items questionnaire designed and developed to assess function and pain after total knee replacement surgery (arthroplasty).
The Items are scored on a 4-point Likert scale. The scale score is the unweighted mean of the scores, ranging from 0 to 48 (with 48 indicating best/least problems and 0 indicating worst/most severe problems).
1 year
Secondary Oxford Knee Score The Oxford Knee Score (OKS) is 12-items questionnaire designed and developed to assess function and pain after total knee replacement surgery (arthroplasty).
The Items are scored on a 4-point Likert scale. The scale score is the unweighted mean of the scores, ranging from 0 to 48 (with 48 indicating best/least problems and 0 indicating worst/most severe problems).
2 years
Secondary EQ-5D-5L Score The EQ-5D-5L Score is 5-items questionnaire designed and developed to assess the quality of life (1.mobility, 2.self care, 3.usual activities, 4.pain/discomfort, 5.anxiety/depression) The Items are scored on a 5-point Likert scale. The scale score is the weighted mean of the scores, ranging from 0 to 5 dimension (with 0 = no problems, 1 = slight problems, 2 = moderate problems, 3 = severe problems, and 4= extreme problems). baseline (preoperative visit)
Secondary EQ-5D-5L Score The EQ-5D-5L Score is 5-items questionnaire designed and developed to assess the quality of life (1.mobility, 2.self care, 3.usual activities, 4.pain/discomfort, 5.anxiety/depression) The Items are scored on a 5-point Likert scale. The scale score is the weighted mean of the scores, ranging from 0 to 5 dimension (with 0 = no problems, 1 = slight problems, 2 = moderate problems, 3 = severe problems, and 4= extreme problems). 1 year
Secondary EQ-5D-5L Score The EQ-5D-5L Score is 5-items questionnaire designed and developed to assess the quality of life (1.mobility, 2.self care, 3.usual activities, 4.pain/discomfort, 5.anxiety/depression) The Items are scored on a 5-point Likert scale. The scale score is the weighted mean of the scores, ranging from 0 to 5 dimension (with 0 = no problems, 1 = slight problems, 2 = moderate problems, 3 = severe problems, and 4= extreme problems). 2 years
Secondary EQ Visual Analog Scale The EQ Visual Analog Scale (EQ VAS) records the respondent's overall current health of the patient on a vertical visual analogue scale, ranging from 0 to 100 (with 100 indicating the best health you can imagine and 0 indicating the worst health you can imagine. Baseline (preoperative visit)
Secondary EQ Visual Analog Scale The EQ Visual Analog Scale (EQ VAS) records the respondent's overall current health of the patient on a vertical visual analogue scale, ranging from 0 to 100 (with 100 indicating the best health you can imagine and 0 indicating the worst health you can imagine. 1 year
Secondary EQ Visual Analog Scale The EQ Visual Analog Scale (EQ VAS) records the respondent's overall current health of the patient on a vertical visual analogue scale, ranging from 0 to 100 (with 100 indicating the best health you can imagine and 0 indicating the worst health you can imagine. 2 years
Secondary Objective Knee Indicators The Objective Knee Indicators is a knee score which assesses range of motion, stability, and alignment, ranging from 0 to 50 points (with 50 indicating a better outcome and 0 indicating a worse score.
he Objective Knee Indicators is a component of The Knee Society Score (KSS), being a knee joint specific questionnaire originally developed and validated in 1989 for use in assessing the outcome of total knee replacement.
Baseline (preoperative visit)
Secondary Objective Knee Indicators The Objective Knee Indicators is a knee score which assesses range of motion, stability, and alignment, ranging from 0 to 50 points (with 50 indicating a better outcome and 0 indicating a worse score.
he Objective Knee Indicators is a component of The Knee Society Score (KSS), being a knee joint specific questionnaire originally developed and validated in 1989 for use in assessing the outcome of total knee replacement.
1 year
Secondary Objective Knee Indicators The Objective Knee Indicators is a knee score which assesses range of motion, stability, and alignment, ranging from 0 to 50 points (with 50 indicating a better outcome and 0 indicating a worse score.
he Objective Knee Indicators is a component of The Knee Society Score (KSS), being a knee joint specific questionnaire originally developed and validated in 1989 for use in assessing the outcome of total knee replacement.
2 years
Secondary Single Leg Stance Test with eyes opened on the right feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
Baseline (preoperative visit)
Secondary Single Leg Stance Test with eyes closed on the right feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
Baseline (preoperative visit)
Secondary Single Leg Stance Test with eyes opened on the right feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
1 year
Secondary Single Leg Stance Test with eyes closed on the right feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
1 year
Secondary Single Leg Stance Test with eyes opened on the right feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
2 years
Secondary Single Leg Stance Test with eyes closed on the right feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
2 years
Secondary Single Leg Stance Test with eyes opened on the left feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
Baseline (preoperative visit)
Secondary Single Leg Stance Test with eyes closed on the left feet The Single Leg Stance (SLS) Test measured the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
Baseline (preoperative visit)
Secondary Single Leg Stance Test with eyes opened on the left feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
1 year
Secondary Single Leg Stance Test with eyes closed on the left feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
1 year
Secondary Single Leg Stance Test with eyes opened on the left feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
2 years
Secondary Single Leg Stance Test with eyes closed on the left feet The Single Leg Stance (SLS) Test measures the Time Ability (number of seconds) of the patient to maintain Single Leg Stance with eyes open or closed.
Adults unable to balance on 1 limb for 5 secs had 2.1 times the risk of having an injurious fall than those who could balance for >5 secs.
2 years
Secondary Time Up and Go Test to assess the fall risk of the patient The Time Up and Go (TUG) is used to assess the mobility and the fall risk of the patient.
The test requires the patient to rise from a chair, walk 3.0 m at a comfortable pace to a mark placed on the floor, turn around at the 3.0 m mark, walk back to the starting point, and return to sitting in the chair.
The score is the time in second taken by the patient to complete the test (with a time higher than 13.5 seconds indicating a higher risk of fall, and a time equal or less than 13.5 seconds indicating a lower risk of fall).
Baseline (preoperative visit)
Secondary Time Up and Go Test to assess the fall risk of the patient The Time Up and Go (TUG) is used to assess the mobility and the fall risk of the patient.
The test requires the patient to rise from a chair, walk 3.0 m at a comfortable pace to a mark placed on the floor, turn around at the 3.0 m mark, walk back to the starting point, and return to sitting in the chair.
The score is the time in second taken by the patient to complete the test (with a time higher than 13.5 seconds indicating a higher risk of fall, and a time equal or less than 13.5 seconds indicating a lower risk of fall).
1 year
Secondary Time Up and Go Test to assess the fall risk of the patient The Time Up and Go (TUG) is used to assess the mobility and the fall risk of the patient.
The test requires the patient to rise from a chair, walk 3.0 m at a comfortable pace to a mark placed on the floor, turn around at the 3.0 m mark, walk back to the starting point, and return to sitting in the chair.
The score is the time in second taken by the patient to complete the test (with a time higher than 13.5 seconds indicating a higher risk of fall, and a time equal or less than 13.5 seconds indicating a lower risk of fall).
2 years
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