In Vivo Determination of 3D Patellofemoral Mechanics (Patella)
Studienübersicht
Status
Status
Bedingungen
Bedingungen
Intervention / Behandlung
Intervention / Behandlung
Studientyp
Studientyp
Einschreibung (Tatsächlich)
Einschreibung
Kontakte und Standorte
Studienorte
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Colorado
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Denver, Colorado, Vereinigte Staaten, 80210
- Porter Adventist Hospital
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Denver, Colorado, Vereinigte Staaten, 80210
- Colorado Joint Replacement
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Tennessee
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Knoxville, Tennessee, Vereinigte Staaten, 37996
- Perkins Hall
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Knoxville, Tennessee, Vereinigte Staaten, 37996
- Science and Engineering Research Facility
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Teilnahmekriterien
Zulassungskriterien
Zulassungskriterien
Studienberechtigtes Alter
Akzeptiert gesunde Freiwillige
Studienberechtigte Geschlechter
Probenahmeverfahren
Studienpopulation
Beschreibung
Inclusion Criteria:
- Patients must be at least six months post-operative.
- Potential subjects will have a body weight of less than 250 lbs.
- Candidates must have an AKS score >70 post-operatively.
- Patients must have passive flexion of at least 100.
- Implanted group must have either an LCS PS RP TKA, having an anatomical patella, or Sigma PS RP TKA; or normal knee group must have normal knee.
- Must be willing to sign both Informed Consent and HIPAA forms.
Exclusion Criteria:
- Pregnant females.
- Subjects not meeting study requirements.
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Beobachtungsmodelle: Nur Fall
- Zeitperspektiven: Retrospektive
Anzahl der Gruppen / Kohorten
Kohorten und Interventionen
Gruppe / KohorteGruppe / Kohorte |
Intervention / BehandlungIntervention / Behandlung |
|---|---|
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Knee Prosthesis LCS PS RP TKA
Subjects implanted with DePuy Low Contact Stress (LCS) Poster Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA)
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Subjects implanted with DePuy Low Contact Stress (LCS) Poster Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA)
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Knee Prosthesis Sigma PS RP TKA
Subjects implanted with a DePuy Sigma Posterior Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA)
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Subjects implanted with a DePuy Sigma Posterior Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA)
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Control
Subjects with normal knees
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Was misst die Studie?
Primäre Ergebnismessungen
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
|
Patella Flexion With Respect to Femur
Zeitfenster: Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
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Full extension to maximum flexion.
Degrees of flexion analyzed for participants with and without implants.
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Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
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Patella Rotation With Respect to Femur
Zeitfenster: Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
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Patellar rotation from full extension to maximum flexion for subjects with and without implants.
A positive measurement of patellar rotation refers to positive flexion of the patella about the medial-lateral axis, where the patella component rotates so that the top of the patella rotates toward the femur and the bottom rotates away.
Conversely, a negative measurement refers to negative flexion of the patella about this axis, where the patellar component rotates so that the top of the patella moves away from the femur and the bottom moves towards.
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Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
|
Patella Tilt With Respect to Femur
Zeitfenster: Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
full extension to maximum flexion for participants with and without implants.
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Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
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Normalized Medial Patella Contact Point Translation
Zeitfenster: Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
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full extension to maximum flexion for participants with and without implants.
Position of the patellar contact point was determined by locating the closest point to the femur on the patella throughout flexion.
There are 2 patello-femoral contact points: a point on the medial aspect of the patella and a point on the lateral aspect of the patella.
Throughout flexion, the medial contact point generally moves closer to the top of the patella (hence the positive value for the results).
The translation of this contact point is normalized to report a ratio between -1 and 1.
In other words, the distance the point has traveled compared to the total height of the patella.
For example, if the patella is 8 cm in height and the point travels approximately 2 cm upwards during flexion, the value would be reported as +2/8 = +0.25.
Definition of normalized: "multiply (a series, function, or item of data) by a factor that makes the norm or some associated quantity such as an integral equal
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Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
|
Normalized Lateral Patella Contact Point Translation
Zeitfenster: Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
full extension to maximum flexion for participants with and without implants.
Position of patellar contact point was determined by locating closest point to femur on patella throughout flexion.
There are 2 patello-femoral contact points: 1 point on the medial aspect of the patella and 1 point on the lateral aspect of the patella.
Throughout flexion, lateral contact point generally moves closer to the top of the patella (hence, the positive value for the results).
The translation of this contact point is normalized to report a ratio between -1 and 1.
The distance the point has traveled compared to the total height of the patella.
For example, if the patella is 8 cm in height and the point travels approximately 2 cm upwards during flexion, the value would be reported as +2/8 = +0.25.
Definition of normalized: "multiply (a series, function, or item of data) by a factor that makes the norm or some associated quantity such as an integral equal to a desired value (usually 1)."
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Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
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Mitarbeiter und Ermittler
Sponsor
Sponsor
Mitarbeiter
Mitarbeiter
Ermittler
Ermittler
- Hauptermittler: Richard D. Komistek, Ph D, The University of Tennessee
- Hauptermittler: Douglas Dennis, MD, Colorado Joint Replacement, Porter Adventist Hosp
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn
Studienbeginn
Primärer Abschluss (Tatsächlich)
Primärer Abschluss
Studienabschluss (Tatsächlich)
Studienabschluss
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Schätzen)
Zuerst gepostet
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes Update gepostet
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Andere Studien-ID-Nummern
Andere Studien-ID-Nummern
- 10035/IIS-000126
- R011373372 (Andere Zuschuss-/Finanzierungsnummer: DePuy Orthopaedics)
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