TOKA: Custom Made Devices for High Tibial Osteotomy (HTO) - Clinical Investigation

  • End date
    Nov 29, 2022
  • participants needed
  • sponsor
    3D Metal Printing Ltd
Updated on 27 January 2021


This preliminary pilot study is a single-centre, prospective, uncontrolled, 32-month study to assess the performance of personalised opening wedge High Tibial Osteotomy (HTO) treatment using the TOKA device and procedure.

The medical device being examined is a custom-made device and therefore does not require a CE mark. Furthermore, the study will serve as a useful method of gathering clinical data and measuring device performance, as well as establishing a potential commercial relationship with the hospital administration.

Study Objectives::

  1. to assess the morphology of the knee joint and the improvement of OA following the TOKA treatment.
  2. to Assess the functional outcome of the knee joint and the improvement of OA following the TOKA treatment.

Outcomes Evaluations::

  1. The morphology of the knee joint is assessed by verifying the matching between the planned correction and the post-operative imaging results, along with the investigation of the maintenance of the desired correction at the follow-up meetings. These results are measured through the correction angle, hip-knee-ankle angle (HKA - mechanical axis), Mikulicz point (recorded as a percentage of the tibial width from the medial to the lateral region) and posterior slope, using the imaging techniques.
  2. The functional outcome of the knee joint is assessed by a) performing a gait analysis of the patients pre-operatively and post-operatively, b) the use of clinical scoring...


Condition Unicompartmental Medial Knee Osteoarthritis
Treatment high tibial osteotomy
Clinical Study IdentifierNCT04574570
Sponsor3D Metal Printing Ltd
Last Modified on27 January 2021


Yes No Not Sure

Inclusion Criteria

Patients undergoing opening wedge Hight Tibial Osteotomy (HTO)
Patients must have completed a consent form for the study
Patients must be prepared to comply with the pre and post-operative investigations, rehabilitation, attendance schedule and questionnaire schedule of the study
Patient in whom any varus deformity present is <20
The diagnosis is of unicompartmental medial osteoarthritis of the knee
Patient has primary diagnosis of Non-Inflammatory Degenerative Joint Disease (NIDJD)
Age range 40 to 65 years

Exclusion Criteria

Refusal to consent to the study
A patient known to have substance abuse or psychological disorders that could interfere with their ability to comply with the post-operative rehabilitation and assessment schedules
Patients unable to read or understand the patient information leaflet and consent form
Patient has a known sensitivity to device materials
Patient has a Body Mass Index (BMI) 40
Patient has an active or suspected latent infection in or about the affected knee joint at time of study device implantation
Patient has received any orthopaedic surgical intervention to the lower extremities within the past year or is expected to require any orthopaedic surgical intervention to the lower extremities, other than the HTO to be enrolled in this study, within the next year
Patient requires bilateral HTO or has a history of unsuccessful contralateral partial replacement or HTO
Patient has chronic heart failure (NYHA Stage 2)
Patient has a neuromuscular or neurosensory deficiency, which limits the ability to evaluate the safety and efficacy of the device
Patient is diagnosed with a systemic disease (e.g. Lupus Erythematosus) or a metabolic disorder (e.g. Paget's disease) leading to progressive bone deterioration
Patient is immunologically suppressed or receiving steroids in excess of normal physiological requirements (e.g. > 30 days)
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