NCT03275246

Establish Implant Accuracy With X-PSI Knee System

Establish Implant Accuracy With X-PSI Knee System - A Multi-center, Prospective, Non-controlled Post Market Study

• Status: Terminated
• Phase: N/A
• Study type: Interventional
• Enrollment: 8 (actual)
• Sponsor: Zimmer, GmbH · Industry
• Sex: All
• Age: 18 Years
• Healthy volunteers: Not accepted

Summary

The goal of this study is to establish the accuracy of the new X-PSI Knee System guides by analyzing early postoperative (4-6 weeks) imaging data with regards to the mechanical alignment and compare them with preoperative planning imaging data. Mechanical alignment in the hip-knee-ankle (HKA) frontal plane with X-PSI Knee System will be measured and compared with results reported in the literature using a conventional (non-guided) approach. Hypothesis: The use of the new X-PSI Knee System achieves the same accuracy with respect to mechanical alignment as with conventional instrumentation.

Detailed description

Patient-specific instruments (PSI) provide surgeons with an anatomically personalized surgery tool. The newly developed and CE-marked X-PSI Knee System is based on long leg x-rays that are used to generate a pre-operative 3D model of the knee. The total knee replacement surgery will be planned according to this 3D model. The aim of this multi-center, prospective, non-controlled post-market study is to scientifically document the accuracy, cost-effectiveness and subsequent clinical performance of the X-PSI Knee System. The X-PSI pin guides are designed to facilitate a more simplified, efficient and customized TKA procedure compared to conventional, non-guided instrumentation. To evaluate the accuracy of the X-PSI Knee System, early postoperative (4-6 weeks) imaging data will be analysed with regards to the mechanical alignment (hip-knee-ankle angle) of the leg and matched to preoperative planning imaging data. The X-PSI Knee System cohort will then be compared with current literature (70% of cases within ±3 degrees) where patients were conventionally operated with non-guided surgery. No control group will be studied. The cost-effectiveness of the X-PSI Knee System will be evaluated with an efficiency matrix to record OR set-up time, surgery time and post-processing time. Clinical outcome data of the patients will be evaluated 4-6 weeks and 1 year post-surgery with the help of patient questionnaires (VAS pain scale, EQ-5D and Oxford Knee Score), a physical exam and the assessment of radiographs. The study population will be compromised of males and females requiring total knee arthroplasty and satisfy the inclusion/exclusion criteria. The study will last one (1) year from the time of surgery. The collected data aim to improve the treatment and quality of life of patients suffering from degenerative joint diseases. In addition, shorter surgery times possibly result in reduced risk of infection, decreased time of anaesthesia and better cost-effectiveness.

Conditions

• Knee Osteoarthritis
• Post-traumatic Osteoarthritis

Interventions

Type	Name	Description
DEVICE	X-PSI Knee System	Patients are operated with X-PSI Knee System guides

Timeline

• Start date: 2018-10-05
• Primary completion: 2019-12-20
• Completion: 2020-11-17
• First posted: 2017-09-07
• Last updated: 2021-10-06
• Results posted: 2021-10-06

Locations

4 sites across 3 countries: Germany, Netherlands, United Kingdom