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CompletedNCT01473199Updated Feb 1, 2022

BioPoly RS Knee Registry Study for Cartilage Defect Replacement

An interventional study of BioPoly RS Partial Resurfacing Knee Implant in Cartilage Injury, Defect of Articular Cartilage and Cartilage Damage, sponsored by BioPoly LLC. Completed at 5 sites in United Kingdom. Open to participants aged 21 Years and older. Per ClinicalTrials.gov, last updated 2022-02-01.

Sponsored by BioPoly LLC · Not applicable, Interventional, and Treatment

Phase
Not applicable
Study type
Interventional
Enrollment
38
Allocation
Not applicable
Ages
21 Years and older
Sex
All
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Study summary

Information will be collected on the pre-op and post-op clinical status of patients with focal cartilage defects of the femoral condyles treated with the BioPoly RS Partial Resurfacing Knee Implant, a permanent orthopaedic implant. The overall aim of the study is to increase the knowledge of patient outcomes such as pain, knee function, level of activity, and overall quality of life after treatment with the device.

Read the detailed description

Information will be collected on the pre-op and post-op clinical status of patients with focal cartilage defects of the femoral condyles treated with the BioPoly RS Partial Resurfacing Knee Implant, a permanent orthopaedic implant. The overall aim of the study is to increase the knowledge of patient outcomes such as pain, knee function, level of activity, and overall quality of life after treatment with the device. Patients will be followed for 5 years after surgery.

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Conditions studied

  • Cartilage Injury
  • Defect of Articular Cartilage
  • Cartilage Damage

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Keywords

  • focal defect
  • focal lesion
  • chondral lesion
  • osteochondral lesion
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In context

Cartilage Diseases

73 studies on the registry are indexed under Cartilage Diseases; 5 are open to participants now.

This study's enrollment of 38 is below the median of 47 across 49 interventional studies indexed under Cartilage Diseases.

Browse Cartilage Diseases studies →

Lead sponsor

BioPoly LLC is the lead sponsor of 3 studies on the registry; 1 is open to participants now.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
21 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

  • Cartilage lesion located in weight bearing region of medial or lateral femoral condyles that have failed prior therapy (conservative or surgical)
  • Lesion classified as ICRS Grade 2, 3, or 4

Exclusion criteria

Exclusion Criteria:

  • Body mass index (BMI) of 30 or more
  • Osteoarthritis or rheumatoid arthritis
  • Gout
  • Uncorrected mal-alignment, ligamentous instability, or meniscal tear
  • Total meniscectomy
  • Kissing lesion on tibia
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Study design

Phase
Not applicable
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
38 participants (actual)

Study arms

  • Experimental
    BioPoly RS Implant

    BioPoly RS Implant

    Device: BioPoly RS Partial Resurfacing Knee Implant

Interventions

  • DeviceBioPoly RS Partial Resurfacing Knee Implant

    A long term, surgically invasive device for replacement of focal osteochondral defects in the weight bearing region of the femoral condyles.

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What researchers measure

Primary outcomes

  1. Knee Injury and Osteoarthritis Outcome Score (KOOS)

    Knee function assessment

    Time frame: 6 months

  2. Knee Injury and Osteoarthritis Outcome Score (KOOS)

    Knee function assessment

    Time frame: 2 years

Secondary outcomes

  1. Knee Injury and Osteoarthritis Outcome Score (KOOS)

    Knee function assessment

    Time frame: Through 5 years

  2. VAS Pain

    Visual analogue scale for assessment of pain

    Time frame: Through 5 years

  3. Tegner Activity

    Measurement of patient's activity level

    Time frame: Through 5 years

  4. SF-36

    Assessment of patient's overall quality of life

    Time frame: Through 5 years

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Study locations

5 sites
  • Chester Knee Clinic, Nuffield Health The Grosvenor Hospital Chester
    Chester, England CH4 7QP, United Kingdom
  • Aintree University Hospital
    Liverpool, England L9 7AL, United Kingdom
  • The London Clinic
    London, England W1G 6HL, United Kingdom
  • Charing Cross Hospital
    London, England W6 8RF, United Kingdom
  • Royal National Orthopaedic Hospital
    Stanmore, England HA7 4LP, United Kingdom
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References and documents

Publications

  • Nathwani D, McNicholas M, Hart A, Miles J, Bobic V. Partial Resurfacing of the Knee with the BioPoly Implant: Interim Report at 2 Years. JB JS Open Access. 2017 Apr 6;2(2):e0011. doi: 10.2106/JBJS.OA.16.00011. eCollection 2017 Jun 26. PubMed 30229214 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Feb 1, 2022, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT01473199
Lead sponsor
BioPoly LLC
Responsible party
Sponsor
First posted
Nov 17, 2011
Start date
Nov 2011
Primary completion
Dec 2016
Completion
Dec 2021
Last update
Feb 1, 2022

Study contacts

Vladimir Bobic, MD
study chair · Nuffield Health, The Grosvenor Hospital Chester
Dinesh Nathwani, MD
principal investigator · The London Clinic
Michael McNicholas, MD
principal investigator · Aintree University Hospital
Alister Hart, MD
principal investigator · Royal National Orthopaedic Hospital

Oversight

Data monitoring committee
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is completed, as verified in Jan 2022. You cannot join it, but the record below documents what was studied.

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