Knee surgery showdown: cement vs. no cement for stronger bones
NCT ID NCT06733597
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study looks at how bone density in the thigh bone changes after knee replacement surgery. Researchers will compare two ways of fixing the new joint: with cement or without. They will also compare surgery done by hand versus with a robot. 100 people aged 55 and older will take part, and the study lasts about 26 months.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- What this could lead to
- If successful, this study could help surgeons choose the best method for knee replacement to preserve bone health.
- What could go wrong
- This is an observational study, not testing a new treatment. Results may not lead to immediate changes in practice.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Not a phased trial
Phase numbers describe drug development. The registry uses this when they do not apply, as it does for trials of devices, procedures or behaviour changes, and for observational studies.
- Participants
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About 100 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Mar 2025
- Expected to finish
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Jun 2028
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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55 years and older
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Patients age greater than or equal to 55 years undergoing TKA with no prior total joint arthroplasty on the surgical side * Normal BMD or osteopenia with Fracture Risk Assessment Tool (FRAX) not meeting Bone Health and Osteoporosis Foundation (BHOF) treatment recommendations, i.e., 10-year major osteoporotic fracture risk greater then or equal to 20 percent or hip fracture risk greater than or equal to 3 percent. Exclusion Criteria: * Known clinical osteoporosis defined as any one of the following: * Hip or spine T-score less than or equal to -2.5 * History of low trauma fracture after age 50 * FRAX fracture risk calculation greater than or equal to 20 percent for major osteoporotic fracture or greater than or equal to 3 percent for hip fracture * Prior or current use of osteoporosis medications * Current use of systemic glucocorticoids or bone-active medications * Rheumatoid arthritis * Laboratory abnormalities that in the opinion of study investigators may impact bone mineral density; including calcium, creatinine, albumin and parathyroid hormone (PTH) * 25(OH)D less than 20 ng/mL * Not suitable for study participation due to other reasons at the investigator's discretion
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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UW School of Medicine and Public Health
RECRUITINGMadison, Wisconsin, 53792, United States
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