Computerized Tomography (CT) Scan Study of Bone Healing Following Open Wedge Proximal Tibial Osteotomy

NCT ID: NCT03431662

Last Updated: 2018-02-13

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

12 participants

Study Classification

INTERVENTIONAL

Study Start Date

2016-03-31

Study Completion Date

2017-03-31

Brief Summary

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The purpose of this study is to assess whether there is a difference between the TomoFix and Ellipse Intramedullary HTO Nail System in terms of bone regeneration in the tibial wedge by performing a CT-scan at 3 and 6-months postoperatively.

Detailed Description

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Malalignment of the knee joint causes arthritis in later life. Currently there are three surgical ways to treat knee arthritis: total knee replacement, partial knee replacement, and high tibial osteotomy (HTO). The former two very much focus on treating the effect of malalignment, i.e. removing the arthritic joint. However, HTO addresses the cause of the arthritis, namely the joint malalignment. This preserves the patient's joint and it means that a patient will start using the unaffected part of the knee joint more.

HTO involves cutting a wedge out the tibia to correct the alignment of that bone with the knee joint, to redistribute load from the affected medial part to lateral part. To keep the tibia in the new position, a medical nail device is attached to keep it in place and allow new bone to regenerate within the wedge. Currently, the market leader for HTO is the TomoFix (by DePuySynthes company) plate and nail device. As the name suggests, TomoFix is fixed at surgery and therefore the change in bone angle cannot be changed afterwards. It does mean that patients can be weight-bearing on the affected leg soon after the HTO procedure. A new CE-marked device is being tested in an interventional trial; it is produced by Ellipse Technologies. This device is an extendable nail and inserted intramedullary; following surgery the nail is tend slowly extended over a period of time until the bone correction is satisfactory.

The CISKO imaging study will assess whether there is a difference between the TomoFix and Ellipse system in terms of bone regeneration in the tibial wedge by performing a CT-scan at 3 and 6 months post-operatively. This will be quantified by two independent radiological reports. A secondary objective is to investigate patient satisfaction and also patient pain levels at these time intervals. The degree of bone healing is usually the main factor holding clinicians back when it comes to advising patients on what activities they can return to post-operatively. A difference in bone healing between the two systems may impact on the advice clinicians can give patients regarding recommencing more intense activities such as recreational sports, which ultimately could positively impact patients' health and well-being.

Conditions

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Osteoarthritis Varus Malalignment

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

BASIC_SCIENCE

Blinding Strategy

NONE

Study Groups

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Ellipse IM HTO Nail

In this arm, the subjects varus malalignment is corrected with Ellipse Intramedullary High Tibial Osteotomy Intramedullary Nail, which is a CE device. The device achieves the correction via progressive distraction osteogenesis.

Group Type EXPERIMENTAL

Ellipse IM HTO Nail

Intervention Type PROCEDURE

A CT scan will be performed at 3 and 6 months postoperatively to assess the healing of the osteotomy site. Endpoint is 6 months.

TomoFix

In this arm, the subjects varus malalignment is corrected with Synthes TomoFix system, which is a CE device. The device achieves the correction via fixating an accute intraoperative correction of the varus malalignment.

Group Type ACTIVE_COMPARATOR

TomoFix

Intervention Type PROCEDURE

A CT scan will be performed at 3 and 6 months postoperatively to assess the healing of the osteotomy site. Endpoint is 6 months.

Interventions

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Ellipse IM HTO Nail

A CT scan will be performed at 3 and 6 months postoperatively to assess the healing of the osteotomy site. Endpoint is 6 months.

Intervention Type PROCEDURE

TomoFix

A CT scan will be performed at 3 and 6 months postoperatively to assess the healing of the osteotomy site. Endpoint is 6 months.

Intervention Type PROCEDURE

Other Intervention Names

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Computerized Tomography (CT) Scan Computerized Tomography (CT) Scan

Eligibility Criteria

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Inclusion Criteria

1. Indicated treatment with medial open wedge proximal tibial osteotomy, either with Tomofix device or Ellipse device
2. Provision of written informed consent
3. Males
4. Mental capacity

Exclusion Criteria

1. Under age (\< 18 years)
2. Patients lacking mental capacity.
3. Females
4. Current use of nicotine products.
5. Patients who cannot understand English and therefore cannot be consented.
Minimum Eligible Age

18 Years

Eligible Sex

MALE

Accepts Healthy Volunteers

No

Sponsors

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Ellipse Technologies, Inc.

INDUSTRY

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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North Cumbria University Hospitals NHS Trust

Carlisle, , United Kingdom

Site Status

Countries

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United Kingdom

Other Identifiers

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PR0251

Identifier Type: -

Identifier Source: org_study_id

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