Optimized Loading Response by JOURNEY II BCS Knee Increases Daily Physical Activity and Functions

The University of Tennessee, Knoxville50 enrolled

Overview

Smith \& Nephew's first edition of the Journey posterior stabilizing total knee arthroplasty was analyzed by the Center for Musculoskeletal Research in a past research study, and it was determined that subjects experienced more normal-like kinematic patterns. They also achieved excessive axial rotation and a decrease in weight-bearing knee flexion. Since Smith \& Nephew has made modifications to the Journey bi-cruciate stabilizing (BCS) total knee arthroplasty (TKA) design, researchers will again evaluate the kinematics of subjects implanted with the revised design to determine if subjects experience normal-like kinematic patterns and if greater weight-bearing knee flexion is achieved. The objective for this study is to analyze the in vivo kinematics for subjects implanted with a 2nd generation Journey BCS TKA and compare those patterns to subjects having a normal knee and those having the 1st generation Journey posterior stabilizing (PS) TKA that were analyzed in the previous study.

Study Type

OBSERVATIONAL

Enrollment

Conditions

Knee Injuries

Interventions

Journey II BCS TKADEVICE

Medical Language ↔ Plain English

Inclusion Criteria for implanted subjects: * Implanted with a Journey II BCS * At least 3 months post-operative with no other surgical procedures within the past 6 months * Body Mass Index (BMI) \< 40 * Body weight \< 250 lbs * Not pregnant * Knee Society score (KSS) of \> 90 * Must be able to walk on level ground without aid of any kind * Must be able to perform deep knee bend activity without aid of any kind * Must be able to perform chair-rise activity without aid of any kind * Must be willing to sign both Informed Consent and HIPAA forms * Speak English Exclusion Criteria for implanted subjects: * Other surgical procedures performed within the past 6 months * \< 3 months post-operative * Pregnant * Severe cardiopulmonary or neurologic disease * Body weight \> 250 lbs * BMI \> 40 * KSS \< 90 * Unable to perform 3 required activities unassisted * Unwilling to sign both Informed Consent and HIPAA forms * Prisoner * Mental disease * Unable to speak English Inclusion Criteria for non-implanted subjects: * healthy, well-functioning knee with no osteoarthritis or knee pathologies * no other surgical procedures within the past 6 months that will prohibit them from performing the three required activities * Body Mass Index \< 40 * Body weight \< 250 lbs * Not pregnant * Knee Society score of \> 90 * Must be able to walk on level ground without aid of any kind * Must be able to perform deep knee bend activity without aid of any kind * Must be able to perform chair-rise activity without aid of any kind * Must be willing to sign both Informed Consent and HIPAA forms * Speak English Exclusion Criteria for non-implanted subjects: * Other surgical procedures performed within the past 6 months that would prohibit them from performing three required activities * Any past knee pathologies, osteoarthritis or knee surgeries, including implants * Pregnant * Severe cardiopulmonary or neurologic disease * Body weight \> 250 lbs * BMI \> 40 * KSS \< 90 * Unable to perform 3 required activities unassisted * Unwilling to sign both Informed Consent and HIPAA forms * Prisoner * Mental disease * Unable to speak English

Locations (3)

Tennessee Orthopaedic Clinic

Knoxville, Tennessee, United States

Tennessee Orthopaedic Foundation for Education and Research

Knoxville, Tennessee, United States

The University of Tennessee

Knoxville, Tennessee, United States

Outcomes

Primary Outcomes

Kinematics Translations During Deep Knee Bend (DKB) Activity

Anterior Posterior (AP) translations of medial femoral condyles during DKB Anterior Posterior (AP) translations of lateral femoral condyles during DKB