Functional Outcomes of Knee Protheses for Malignant Tumours of Bone

Study Overview
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Brief Summary
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The placement of mega knee prosthesis is a necessity after a large tumor resection and oncological. These mega knee prostheses implanted in the context of oncological surgery have been very few evaluated in the literature. Active knee extension is essential in order to walk properly. The study propose the evaluation of this prosthesis by checking the possibility of locking of the prosthetic joint and thus the possibility of active walking. A more in-depth, isokinetic analysis at 1 year of follow-up will also be done in an exploratory manner, as the literature has no data on this subject.

Official Title
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Clinical Results, Isokinetic Analysis and Radiologic Outcomes of Knee MUTARS Protheses Replacement for Malignant Tumours of Bone

Conditions
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Knee Disease, Bone Cancer

Intervention / Treatment
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* Procedure: MUTARS® modular reconstruction prostheses


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Patient with MUTARS® modular reconstruction prostheses following primary or secondary knee bone malignancy with minimal follow-up of one year, Cardiological follow-up including at least one ECG and a clinical examination of less than 1 year (ability to perform the isokinetic test), Written informed consent from patient, Socially insured patient, Patient willing to comply with all study procedures and study duration. Exclusion Criteria: - Underage, Less than a one-year follow-up after surgery (stability of results is not achieved if follow-up is less than one year), Meniscal lesion knee healthy side, Prosthetic surgery of the knee healthy side, Patient with an unbound fracture, Patient without cardiological follow-up, Pregnant or breastfeeding woman, Inability to receive information, consent and participate in the whole study, No social insurance cover, No written consent, Person under judicial protection or deprived of liberty.

Ages Eligible for Study
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Minimum Age: 18 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Other
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: case group<br>Patients with knee bone malignancy | Procedure: MUTARS® modular reconstruction prostheses<br>* Patients with MUTARS® modular reconstruction prostheses following primary or secondary knee bone malignancy with minimal follow-up of one year<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Rate of patients with active locking of the operated knee | rate of patients with successful locking will be estimated by the frequency observed Active locking of the operated knee | Baseline | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Measurement of joint amplitudes | Functional results of patients with medullary reconstruction prosthesis,joint amplitudes in flexion-extension and in active, passive, | Baseline | 
| Presence of frontal and sagittal laxity | Functional results of patients with medullary reconstruction prosthesis | Baseline | 
| Musculoskeletal Tumour Society Scoring System (MSTS) | The MSTS Score may be used as a functional measure for patients with sarcoma involving the upper limb. The score includes 6 measures (pain, function, emotional acceptance, hand position, manual dexterity, lifting ability) each measure with a maximum of 5 points. The maximum overall score is 30 points. The score is designed to be used after the procedure and is therefore only collected post-operatively. | Baseline | 
| Oxford knee score | The Oxford Knee Score (OKS) is a Patient Reported Outcome questionnaire that was developed to specifically assess the patient's perspective of outcome following Total Knee Arthroplasty. Each of the 12 answers are assigned the previously defined number of points. They range from 1 = least difficult to 5 = most difficult. The 12 ratings are then added together to give a total score used to assess the patient. Functional results of patients with medullary reconstruction prosthesis | Baseline | 
| KOOS for the daily impact (subjective score) | The Knee injury and Osteoarthritis Outcome Score (KOOS) is a patient-reported outcome measurement instrument, developed to assess the patient's opinion about their knee and associated problems Functional results of patients with medullary reconstruction prosthesis | Baseline | 
| International Knee Society (IKS) score | International Knee Society score : range 0 to 200, a higher score means a better outcome Functional results of patients with medullary reconstruction prosthesis | Baseline | 
| Radiological evaluation | Radiological results of patients with medullary reconstruction prosthesis Radiological criterion : Lower limb axis,Blackburn and Peel index for patellar height, Radiological signs of loosening | Baseline | 
| Isokinetic strength of the quadriceps and ischio-leg muscles during knee flexion and extension by isokinetic machine type Contrex®. | Muscle recovery of the operated limb compared to the healthy limb | Baseline | 
| The test angular velocities are 60°/s and 180°/s in concentric contraction mode by isokinetic machine type Contrex®. | Muscle recovery of the operated limb compared to the healthy limb . | Baseline | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Tumour, prosthese replacement, functional outcomes, knee, isokinetic