CompletedNot Applicable

A Roentgen Stereophotogrammetric Analysis on Migration of Knee Prostheses.

Denmark50 participantsStarted 2003-11

Plain-language summary

The purpose of this study is to compare the early migration of two uncemented total knee arthroplasties with different metal coating. Only the tibial prosthesis plateau varies. One is made out of tantalum and has two short pegs for fixation into the tibia while the other is covered by titanium fiber-mesh on the bone-near site and has 4 short pegs for screw fixation into the tibia.

Who can participate

Age range

18 Years – 70 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. Patients with one- or double-sided primary knee arthrosis.
. Patients with a sufficient bone quality for implantation of an uncemented prosthesis.
. Informed and written patient consent.

Exclusion criteria

. Patients with neuromuscular or vascular diseases in the affected leg.
. Patients who peroperatively are estimated unsuitable for an uncemented knee arthroplasty e.g. due to bone cysts or dilution of the bone mass.
. Patients who use non-steroid anti-inflammatory drugs (NSAID) and cannot refrain from taking them postoperatively (this includes COX-2-inhibitors).

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

Polyethylene wear (mm) of the medial and lateral knee prosthesis compartments at 5 years followup measured with model-based radiostereometry

Timeframe: Up to 5 years

Trial details

NCT IDNCT00138853

SponsorUniversity of Aarhus

Sponsor typeOTHER

Study typeINTERVENTIONAL

Primary completion2010-04

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