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