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Robotergestützte versus konventionelle Knieendoprothetiktechniken (ROCKETS)

16. September 2026 aktualisiert von: Olof Skoldenberg, Danderyd Hospital

ROCKETS: Robotergestützte versus konventionelle Knieendoprothesentechniken in einer randomisierten, multizentrischen, präferenztoleranten Studie

Rationale for conducting the study:

The ROCKET study evaluates the clinical and economic outcomes of robot-assisted total knee arthroplasty (RTKR) compared with conventional total knee arthroplasty (TKR). The primary endpoint is the proportion of randomized participants achieving a Forgotten Joint Score (FJS) of ≥80 points at 24 months after surgery. Secondary outcomes include patient-reported knee function, health-related quality of life, self-reported instability, physical activity, radiographic alignment, surgical and technical outcomes, complications, reoperations, revisions, and health-economic outcomes.

Study design:

International multicentre, preference-tolerant, randomized, controlled superiority trial with two treatment arms comparing RTKR with conventional TKR. Participants in the randomized part are allocated 1:1. At selected centres where feasible, an optional participant-blinded randomized component may be implemented. Eligible patients who do not undergo randomization may participate in a parallel observational/preference cohort, which is analysed separately from the primary randomized comparison.

Study population:

Adults aged 18 years and older who are eligible for total knee arthroplasty according to local guidelines and who provide informed consent.

Number of patients:

Up to 1,600 randomized participants. Eligible non-randomized participants may additionally be included in the observational/preference cohort.

Primary outcome:

Proportion of randomized participants achieving FJS ≥80 points at 24 months after surgery.

Long-term follow-up:

Patient-reported and registry-based outcomes are planned at 5 and 10 years after surgery where feasible.

Studienübersicht

Status

Rekrutierung

Bedingungen

Intervention / Behandlung

Detaillierte Beschreibung

The ROCKET study is an international multicentre, prospective, preference-tolerant randomized controlled superiority trial comparing robot-assisted total knee arthroplasty with conventional total knee arthroplasty.

Participants in the randomized component are allocated 1:1 to robot-assisted or conventional total knee arthroplasty. Randomization is stratified by participating centre and sex. At selected centres where practical and approved, participants may remain blinded to treatment allocation until completion of the 24-month follow-up unless earlier unblinding is clinically required or requested by the participant. Surgeons and operating-room personnel cannot be blinded. Outcome assessment is performed blinded to treatment allocation whenever feasible.

Eligible patients who are unwilling to undergo randomization, or for whom treatment equipoise cannot be achieved, may enter a parallel observational/preference cohort. Treatment in this cohort follows patient and surgeon preference. The observational/preference cohort is analysed separately from the primary randomized comparison.

The primary endpoint is the proportion of randomized participants achieving a Forgotten Joint Score (FJS) of ≥80 points at 24 months after surgery. Follow-up includes patient-reported outcomes, activity, radiographic alignment, surgical and technical variables, complications, reoperations, revisions and health-economic outcomes. Long-term follow-up is planned at 5 and 10 years after surgery, including PROMs where available and registry-based outcomes such as reoperations, revisions, complications and mortality.

Studientyp

Interventionell

Einschreibung (Geschätzt)

1600

Phase

  • Unzutreffend

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienkontakt

Studienorte

      • Hässleholm, Schweden, 281 38
        • Rekrutierung
        • Hässleholm Hospital
      • Stockholm, Schweden, 182 88
        • Rekrutierung
        • Danderyd Hospital
        • Kontakt:
        • Hauptermittler:
          • Olof Skoldenberg, MD, PhD

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

18 Jahre und älter (Erwachsene, Älterer Erwachsener)

Akzeptiert gesunde Freiwillige

Nein

Studienberechtigte Geschlechter

Alle

Beschreibung

Inclusion Criteria:

  • Adults aged 18 years and older.
  • Eligible for total knee arthroplasty according to local guidelines and routines.
  • Willingness to participate in the study.

Exclusion Criteria:

  • Patients with extreme malalignment necessitating special implants or techniques.
  • Patients unfit for surgery due to other medical reasons.
  • Patients who, for other reasons such as alcohol or substance abuse, are deemed unsuitable to participate in the study.
  • Patients who, for other reasons, cannot fulfil the required patient-reported outcome measures.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

  • Hauptzweck: Behandlung
  • Zuteilung: Zufällig
  • Interventionsmodell: Parallele Zuordnung
  • Maskierung: Single

Waffen und Interventionen

Teilnehmergruppe / Arm
Intervention / Behandlung
Experimental: RTKR

Robot-assisted total knee arthroplasty (RTKR).

Robot-assisted total knee arthroplasty using an approved robotic surgical system to assist intraoperative planning, bone preparation, implant positioning and balancing according to the participating centre's approved technique.

Aktiver Komparator: TKR

Conventional total knee arthroplasty (TKR).

Conventional total knee arthroplasty using standard manual instrumentation according to local clinical routine.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Proportion of participants achieving a Forgotten Joint Score (FJS) ≥80 points
Zeitfenster: 24 months after surgery

The primary endpoint is the proportion of randomized participants achieving an FJS of ≥80 points at 24 months after surgery. The FJS ranges from 0 to 100, with higher scores indicating less awareness of the replaced knee during everyday activities.

24 months after surgery

Sekundäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Forgotten Joint Score (FJS), continuous score
Zeitfenster: Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery

FJS is scored from 0 to 100, with higher scores indicating less awareness of the replaced knee.

Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery
Knee injury and Osteoarthritis Outcome Score (KOOS)
Zeitfenster: Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery

KOOS assesses knee-related pain, symptoms, activities of daily living, sport/recreation and knee-related quality of life. Each subscale ranges from 0 to 100, with higher scores indicating better outcome.

Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery
Self-reported knee instability (ADLS items)
Zeitfenster: Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery

Self-reported slipping/partial giving way and buckling/full giving way are assessed using items from the Activities of Daily Living Scale of the Knee Outcome Survey.

Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery
EQ-5D and EQ VAS
Zeitfenster: Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery

Health-related quality of life is assessed using EQ-5D and EQ VAS.

Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery
Patient activity and walking distance
Zeitfenster: Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery

Patient activity and walking distance are assessed during follow-up using the study's prespecified activity measurements.

Baseline, 6 weeks, 12 months, 24 months, 5 years and 10 years after surgery
Knee alignment
Zeitfenster: Preoperative and approximately 6 weeks after surgery

Coronal knee alignment is assessed using long-standing radiographs, including Hip-Knee-Ankle alignment and Coronal Plane Alignment of the Knee (CPAK) classification.

Preoperative and approximately 6 weeks after surgery
Surgery time
Zeitfenster: During the index operation

Duration of the surgical procedure is recorded in minutes.

During the index operation
Technical and intraoperative surgical outcomes
Zeitfenster: During the index operation

Technical difficulties and prespecified intraoperative surgical details are recorded.

During the index operation
Range of motion (ROM)
Zeitfenster: 24 months after surgery

Knee range of motion is assessed at the 24-month follow-up.

24 months after surgery
Reoperations and revisions
Zeitfenster: Up to 24 months, with additional follow-up at 5 and 10 years

Reoperations and revisions of the index knee are recorded during the primary study period and assessed during long-term follow-up where data are available.

Up to 24 months, with additional follow-up at 5 and 10 years
Adverse events and complications
Zeitfenster: Up to 24 months, with additional long-term assessment at 5 and 10 years

Adverse events and complications related to the index knee arthroplasty are recorded. Long-term complications may additionally be assessed using approved registry or other data sources.

Up to 24 months, with additional long-term assessment at 5 and 10 years
Mortality
Zeitfenster: 90 days, 1 year, 5 years and 10 years after surgery

Mortality is assessed using available approved registry or other data sources.

90 days, 1 year, 5 years and 10 years after surgery
Health-economic outcomes
Zeitfenster: Up to 24 months; exploratory long-term analyses at 5 and 10 years where data are available

Health-economic analyses include direct and indirect costs and cost-effectiveness using health-related quality-of-life data.

Up to 24 months; exploratory long-term analyses at 5 and 10 years where data are available

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Mitarbeiter

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

4. März 2024

Primärer Abschluss (Geschätzt)

1. Dezember 2029

Studienabschluss (Geschätzt)

1. Dezember 2037

Studienanmeldedaten

Zuerst eingereicht

4. April 2024

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

26. April 2024

Zuerst gepostet (Tatsächlich)

29. April 2024

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

21. September 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

16. September 2026

Zuletzt verifiziert

1. September 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Andere Studien-ID-Nummern

  • 2024DS
  • Knee (Andere Kennung: Danderyds sjukhus)

Plan für individuelle Teilnehmerdaten (IPD)

Planen Sie, individuelle Teilnehmerdaten (IPD) zu teilen?

NEIN

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Nein

Produkt, das in den USA hergestellt und aus den USA exportiert wird

Nein

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