Orthopilot Elite Post-Market Clinical Follow-Up

Prospective, Multicenter, Observational, Comparative Clinical Trial on the Equivalence of Two Different OrthoPilot® Navigation System Generations Applied for Computer-assisted Total Knee Arthroplasty

Prospective, multicenter, observational, comparative clinical trial on the equivalence of two different OrthoPilot® navigation system generations applied for computer-assisted total knee arthroplasty

Study Overview

• Status: Completed
• Conditions: Rheumatoid Arthritis; Instability, Joint; Degenerative Osteoarthritis; Posttraumatic Arthropathy; Deformity of Knee; Stiffness of Knee, Not Elsewhere Classified
• Intervention / Treatment: Device: Computer assisted primary total knee replacement with OrthoPilot FS101 navigation system and Software 5.1; Device: Computer assisted primary total knee replacement with OrthoPilot Elite navigation system and Software 6.0

Detailed Description

The study is designed as a prospective, non-interventional, multicenter, comparative cohort study. The product under investigation will be used in routine clinical practice and according to the authorized Instructions for Use (IfU). Those data that are obtained in routine clinical use will be documented in the Case Report Form (CRF).

The study design is based on a two-arms design. The patients for the both groups will be recruited consecutively, starting with group A. The study will prove the equivalence of the groups regarding the outcome of the postoperative lower limb alignment (mechanical leg axis) and any deviation >3° from neutral alignment is defined as an outlier.

• Study Type: Observational
• Enrollment (Actual): 217

Contacts and Locations

Study Locations

• Germany
  • Dresden, Germany, 01307
    • Universitätsklinikum Carl Gustav Carus
  • Freiburg, Germany, 79106
    • Uniklinikum Freiburg
  • Hamburg, Germany, 22081
    • Schönkliniken Klinikum Eilbek

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: 18 years to 80 years (Adult, Older Adult)
• Accepts Healthy Volunteers: No
• Genders Eligible for Study: All

• Sampling Method: Non-Probability Sample

Study Population

adult patients

Description

Inclusion: Inclusion Criteria:

• Patients with indication for Total Knee Arthroplasty using the Aesculap OrthoPilot® navigation system and a corresponding primary implant
• Dated and signed informed consent

Exclusion: Exclusion Criteria

• Pregnancy
• Patients < 18 years
• Patients unable to participate at the follow-up examination (physically, mentally)
• Previous joint replacement at the indexed knee

Study Plan

How is the study designed?

Design Details

• Observational Models: Cohort
• Time Perspectives: Prospective

Number of groups / cohorts

2

Cohorts and Interventions

Group / Cohort	Intervention / Treatment
A Standard; Computer assisted primary total knee replacement with OrthoPilot FS 101 navigation system and Software 5.1	Device: Computer assisted primary total knee replacement with OrthoPilot FS101 navigation system and Software 5.1; Computer Assisted Total Knee Replacement with the OrthoPilot FS101 and the software TKA 5.1
B Elite; Computer assisted primary total knee replacement with OrthoPilot Elite navigation system and Software 6.0	Device: Computer assisted primary total knee replacement with OrthoPilot Elite navigation system and Software 6.0; Computer Assisted Total Knee Replacement with the with the OrthoPilot Elite and the software TKA 6.0

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Rate of Lower Limb Alignment inside the range of 0±3°	A postoperative lower limb alignment of the knee prosthesis in reference to the mechanical leg axis (3, 18) outside the range of ± 3° is defined as the outlier. The outlier rates will be used as the efficacy criterion for groups comparison	three months postoperatively

Secondary Outcome Measures

Outcome Measure	Measure Description	Time Frame
Lower limb alignment of the knee prosthesis in reference to the mechanical leg axis	The outcome and function of a prosthesis is influenced by the postoperative alignment of the leg and the orientation in reference to the axis. Incorrect positioning can lead to an increased implant wear and functional limitations (23, 24). The aim of a postoperative alignment within 3° varus to 3° valgus will be assessed using long leg x-rays 3-4 months postoperatively.	3 months postoperatively
Improvement of Knee Society Score (KSS)	The KSS score is composed of two subgroups and has a maximum score of 200.	preoperatively and three months postoperatively
Improvement of Oxford Knee Score (OKS)	A patient-reported outcome instrument which contains 12 questions on activities of daily living that assess function and residual pain in patients undergoing total knee replacement (TKR) arthroplasty. Oxford Knee Score has a maximum of 48 points indicating satisfactory knee function	preoperatively and three months postoperatively
Improvement of Quality of Life (EQ-5D-5L)	The EQ-5D-5L essentially consists of 2 pages: the EQ-5D descriptive system and the EQ visual analogue scale (EQ VAS). The descriptive system comprises five dimensions: mobility, self-care, usual activities, pain/discomfort and anxiety/depression. Each dimension has 5 levels: no problems, slight problems, moderate problems, severe problems and extreme problems. This decision results in a 1-digit number that expresses the level selected for that dimension. The digits for the five dimensions can be combined into a 5-digit number that describes the patient's health state.	preoperatively and three months postoperatively
Learning Curve	The first 10 cases of each surgeon shall be excluded from the main analysis. The results of the first 10 cases ("learning curve") shall be assessed separately and compared with the "10 plus" cases ("routine cases") as a secondary learning curve analysis. The potential learning curve will be assessed measuring the intraoperative surgery time in reference to the already performed procedures of each surgeon	Intraoperatively
Intraoperative handling of soft- and hardware components	Aim of this study is also to document any upcoming problems or limitations the operating surgeon has with the new components of the OrthoPilot® Elite hardware system and the new software application TKA 6.0 for the implantation of primary total knee endoprosthesis. Intraoperatively documented results of the navigation system will be recorded and integrated into the final analysis. Potential problems or comments will be analysed descriptively.	Intraoperatively
(Serious) Adverse Device Effects	As part of the follow-up examination, any upcoming (serious) adverse device events or effects related or not related to the product under investigation, will be documented in the dedicated Case Report Forms. Recorded complications will be categorized and analyzed in order to assess the safety of the OrthoPilot® navigation system	up to 3 months postoperatively

Collaborators and Investigators

• Sponsor: Aesculap AG

Study record dates

Study Major Dates

• Study Start (Actual): July 1, 2019
• Primary Completion (Actual): June 30, 2022
• Study Completion (Actual): October 29, 2022

Study Registration Dates

• First Submitted: January 23, 2019
• First Submitted That Met QC Criteria: January 23, 2019
• First Posted (Actual): January 25, 2019

Study Record Updates

• Last Update Posted (Estimate): January 16, 2023
• Last Update Submitted That Met QC Criteria: January 13, 2023
• Last Verified: January 1, 2023

More Information

Terms related to this study

• Keywords: Total Knee Arthroplasty; Navigation; Computer Assisted Orthopedic Surgery; OrthoPilot®
• Additional Relevant MeSH Terms: Joint Diseases; Musculoskeletal Diseases; Rheumatic Diseases; Arthritis; Osteoarthritis; Joint Instability
• Other Study ID Numbers: AAG-O-H-1708

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: No
• Studies a U.S. FDA-regulated device product: No