In Vivo Determination of 3D Patellofemoral Mechanics (Patella)
Přehled studie
Postavení
Postavení
Podmínky
Podmínky
Intervence / Léčba
Intervence / Léčba
Typ studie
Typ studie
Zápis (Aktuální)
Zápis
Kontakty a umístění
Studijní místa
-
-
Colorado
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Denver, Colorado, Spojené státy, 80210
- Porter Adventist Hospital
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Denver, Colorado, Spojené státy, 80210
- Colorado Joint Replacement
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Tennessee
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Knoxville, Tennessee, Spojené státy, 37996
- Perkins Hall
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Knoxville, Tennessee, Spojené státy, 37996
- Science and Engineering Research Facility
-
-
Kritéria účasti
Kritéria způsobilosti
Kritéria způsobilosti
Věk způsobilý ke studiu
Přijímá zdravé dobrovolníky
Pohlaví způsobilá ke studiu
Metoda odběru vzorků
Studijní populace
Popis
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.
Studijní plán
Jak je studie koncipována?
Detaily designu
- Observační modely: Pouze případ
- Časové perspektivy: Retrospektivní
Počet skupin / kohort
Kohorty a intervence
Skupina / kohortaSkupina / kohorta |
Intervence / LéčbaIntervence / Léčba |
|---|---|
|
Knee Prosthesis LCS PS RP TKA
Subjects implanted with DePuy Low Contact Stress (LCS) Poster Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA)
|
Subjects implanted with DePuy Low Contact Stress (LCS) Poster Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA)
|
|
Knee Prosthesis Sigma PS RP TKA
Subjects implanted with a DePuy Sigma Posterior Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA)
|
Subjects implanted with a DePuy Sigma Posterior Stabilizing (PS) Rotating Platform (RP) Total Knee Arthroplasty (TKA)
|
|
Control
Subjects with normal knees
|
Co je měření studie?
Primární výstupní opatření
Primární výstupní opatření
Měření výsledku |
Popis opatření |
Časové okno |
|---|---|---|
|
Patella Flexion With Respect to Femur
Časové okno: 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.
Degrees of flexion analyzed for participants with and without implants.
|
Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
|
Patella Rotation With Respect to Femur
Časové okno: Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
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.
|
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
Časové okno: 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.
|
Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
|
Normalized Medial Patella Contact Point Translation
Časové okno: 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 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
|
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
Časové okno: 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)."
|
Average post-operative time for LCS-PS group was 56 months. Average post-operative time for PS RP group was 55.7 months.
|
Spolupracovníci a vyšetřovatelé
Sponzor
Sponzor
Spolupracovníci
Spolupracovníci
Vyšetřovatelé
Vyšetřovatelé
- Vrchní vyšetřovatel: Richard D. Komistek, Ph D, The University of Tennessee
- Vrchní vyšetřovatel: Douglas Dennis, MD, Colorado Joint Replacement, Porter Adventist Hosp
Termíny studijních záznamů
Hlavní termíny studia
Začátek studia
Začátek studia
Primární dokončení (Aktuální)
Primární dokončení
Dokončení studie (Aktuální)
Dokončení studie
Termíny zápisu do studia
První předloženo
První předloženo
První předloženo, které splnilo kritéria kontroly kvality
První předloženo, které splnilo kritéria kontroly kvality
První zveřejněno (Odhad)
První zveřejněno
Aktualizace studijních záznamů
Poslední zveřejněná aktualizace (Aktuální)
Poslední zveřejněná aktualizace
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Odeslaná poslední aktualizace, která splnila kritéria kontroly kvality
Naposledy ověřeno
Naposledy ověřeno
Více informací
Termíny související s touto studií
Další identifikační čísla studie
Další identifikační čísla studie
- 10035/IIS-000126
- R011373372 (Jiné číslo grantu/financování: DePuy Orthopaedics)
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