In Vivo Determination of 3D Patellofemoral Mechanics (Patella)
Descripción general del estudio
Estado
Estado
Condiciones
Condiciones
Intervención / Tratamiento
Intervención / Tratamiento
Tipo de estudio
Tipo de estudio
Inscripción (Actual)
Inscripción
Contactos y Ubicaciones
Ubicaciones de estudio
-
-
Colorado
-
Denver, Colorado, Estados Unidos, 80210
- Porter Adventist Hospital
-
Denver, Colorado, Estados Unidos, 80210
- Colorado Joint Replacement
-
-
Tennessee
-
Knoxville, Tennessee, Estados Unidos, 37996
- Perkins Hall
-
Knoxville, Tennessee, Estados Unidos, 37996
- Science and Engineering Research Facility
-
-
Criterios de participación
Criterio de elegibilidad
Criterio de elegibilidad
Edades elegibles para estudiar
Acepta Voluntarios Saludables
Géneros elegibles para el estudio
Método de muestreo
Población de estudio
Descripción
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.
Plan de estudios
¿Cómo está diseñado el estudio?
Detalles de diseño
- Modelos observacionales: Solo caso
- Perspectivas temporales: Retrospectivo
Número de grupos/cohortes
Cohortes e Intervenciones
Grupo / CohorteGrupo / Cohorte |
Intervención / TratamientoIntervención / Tratamiento |
|---|---|
|
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
|
¿Qué mide el estudio?
Medidas de resultado primarias
Medidas de resultado primarias
Medida de resultado |
Medida Descripción |
Periodo de tiempo |
|---|---|---|
|
Patella Flexion With Respect to Femur
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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
Periodo de tiempo: 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.
|
Colaboradores e Investigadores
Patrocinador
Patrocinador
Colaboradores
Colaboradores
Investigadores
Investigadores
- Investigador principal: Richard D. Komistek, Ph D, The University of Tennessee
- Investigador principal: Douglas Dennis, MD, Colorado Joint Replacement, Porter Adventist Hosp
Fechas de registro del estudio
Fechas importantes del estudio
Inicio del estudio
Inicio del estudio
Finalización primaria (Actual)
Finalización primaria
Finalización del estudio (Actual)
Finalización del estudio
Fechas de registro del estudio
Enviado por primera vez
Enviado por primera vez
Primero enviado que cumplió con los criterios de control de calidad
Primero enviado que cumplió con los criterios de control de calidad
Publicado por primera vez (Estimar)
Publicado por primera vez
Actualizaciones de registros de estudio
Última actualización publicada (Actual)
Última actualización publicada
Última actualización enviada que cumplió con los criterios de control de calidad
Última actualización enviada que cumplió con los criterios de control de calidad
Última verificación
Última verificación
Más información
Términos relacionados con este estudio
Otros números de identificación del estudio
Otros números de identificación del estudio
- 10035/IIS-000126
- R011373372 (Otro número de subvención/financiamiento: DePuy Orthopaedics)
Esta información se obtuvo directamente del sitio web clinicaltrials.gov sin cambios. Si tiene alguna solicitud para cambiar, eliminar o actualizar los detalles de su estudio, comuníquese con register@clinicaltrials.gov. Tan pronto como se implemente un cambio en clinicaltrials.gov, también se actualizará automáticamente en nuestro sitio web. .