Orthopaedic implant for total knee replacement

Range of motion is knee flexion (how far the patient can bend their knee) minus knee extension (how far the patient can straighten their knee). The result of this subtraction is the range of motion (bending and straightening) for that knee.

Range of motion is knee flexion (how far the patient can bend their knee) minus knee extension (how far the patient can straighten their knee). The result of this subtraction is the range of motion (bending and straightening) for that knee.

The Oxford Knee Score (OKS) is a 12 to 60 point patient reported outcome (PRO) score (where 12 indicates the best outcome) that evaluates the affected knee. The total score is composed of Pain and Function.

The Oxford Knee Score (OKS) is a 12 to 60 point patient reported outcome (PRO) score (where 12 indicates the best outcome) that evaluates the affected knee. The total score is composed of Pain and Function.

The Oxford Knee Score (OKS) is a 12 to 60 point patient reported outcome (PRO) score (where 12 indicates the best outcome) that evaluates the affected knee. The total score is composed of Pain and Function.

American Knee Society (AKS) knee score is a 0-100 point score (where 100 indicates excellent knee condition) that evaluates the affected knee. The knee score is composed of Pain, Range of Motion, and Stability.

American Knee Society (AKS) knee score is a 0-100 point score (where 100 indicates excellent knee condition) that evaluates the affected knee. The knee score is composed of Pain, Range of Motion, and Stability.

American Knee Society (AKS) knee score is a 0-100 point score (where 100 indicates excellent knee condition) that evaluates the affected knee. The knee score is composed of Pain, Range of Motion, and Stability.

American Knee Society (AKS) function score is a 0-100 point score (where 100 indicates excellent knee function) that evaluates the affected knee. The function score is composed of walking and stair climbing ability.

American Knee Society (AKS) function score is a 0-100 point score (where 100 indicates excellent knee function) that evaluates the affected knee. The function score is composed of walking and stair climbing ability.

American Knee Society (AKS) function score is a 0-100 point score (where 100 indicates excellent knee function) that evaluates the affected knee. The function score is composed of walking and stair climbing ability.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

Tibial Radiolucency observes a radiolucent line (of 0.5mm or wider) on the radiograph around the tibial component.

Tibial Radiolucency observes a radiolucent line (of 0.5mm or wider) on the radiograph around the tibial component.

Tibial Radiolucency observes a radiolucent line (of 0.5mm or wider) on the radiograph around the tibial component.

Lateral release is a surgical procedure to release tight capsular structures (lateral retinaculum) on the outside of the kneecap (patella). It is performed during knee surgery and allows the kneecap to move smoothly in the center of the knee. Rate information was collected at time of study surgery.

Lateral release is a surgical procedure to release tight capsular structures (lateral retinaculum) on the outside of the kneecap (patella). It is performed during knee surgery and allows the kneecap to move smoothly in the center of the knee. Rate information was collected at time of study surgery.

Kaplan Meier survivorship analysis estimates the proportion of a population that will survive past a certain time avoiding a certain event. In this study, the event is removal of any component for any reason, also known as revision for any reason. Survival estimates are provided when 40 devices are left still being followed.

Kaplan Meier survivorship analysis estimates the proportion of a population that will survive past a certain time avoiding a certain event. In this study, the event is removal of any component for any reason, also known as revision for any reason. Survival estimates are provided when 40 devices are left still being followed.

Kaplan Meier survivorship analysis estimates the proportion of a population that will survive past a certain time avoiding a certain event. In this study, the event is removal of any component for any reason, also known as revision for any reason. Survival estimates are provided when 40 devices are left still being followed.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

PFC Sigma Fixed Bearing Total Knee System with PCL Retained

P.F.C Sigma Fixed Bearing total knee system: Orthopaedic implant for total knee replacement

PFC Sigma Rotating Platform Total Knee System with PCL Retained

P.F.C Sigma RP Mobile Bearing knee system: Orthopaedic implant for total knee replacement

Total of all reporting groups

PFC Sigma Rotating Platform Total Knee System with PCL Sacrificed

P.F.C Sigma RP Mobile Bearing knee system: Orthopaedic implant for total knee replacement

Range of motion is knee flexion (how far the patient can bend their knee) minus knee extension (how far the patient can straighten their knee). The result of this subtraction is the range of motion (bending and straightening) for that knee.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 158 subjects in the PFC Sigma Fixed Bearing and 155 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Range of motion is knee flexion (how far the patient can bend their knee) minus knee extension (how far the patient can straighten their knee). The result of this subtraction is the range of motion (bending and straightening) for that knee.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 164 subjects in the PFC Sigma Fixed Bearing and 164 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Range of motion is knee flexion (how far the patient can bend their knee) minus knee extension (how far the patient can straighten their knee). The result of this subtraction is the range of motion (bending and straightening) for that knee.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 158 subjects in the PFC Sigma Fixed Bearing and 153 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Range of motion is knee flexion (how far the patient can bend their knee) minus knee extension (how far the patient can straighten their knee). The result of this subtraction is the range of motion (bending and straightening) for that knee.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 156 subjects in the PFC Sigma Fixed Bearing and 148 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Range of motion is knee flexion (how far the patient can bend their knee) minus knee extension (how far the patient can straighten their knee). The result of this subtraction is the range of motion (bending and straightening) for that knee.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 170 subjects in the PFC Sigma Fixed Bearing and 161 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Range of motion is knee flexion (how far the patient can bend their knee) minus knee extension (how far the patient can straighten their knee). The result of this subtraction is the range of motion (bending and straightening) for that knee.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 123 subjects in the PFC Sigma Fixed Bearing and 124 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The Oxford Knee Score (OKS) is a 12 to 60 point patient reported outcome (PRO) score (where 12 indicates the best outcome) that evaluates the affected knee. The total score is composed of Pain and Function.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 145 subjects in the PFC Sigma Fixed Bearing and 138 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The Oxford Knee Score (OKS) is a 12 to 60 point patient reported outcome (PRO) score (where 12 indicates the best outcome) that evaluates the affected knee. The total score is composed of Pain and Function.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 134 subjects in the PFC Sigma Fixed Bearing and 118 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The Oxford Knee Score (OKS) is a 12 to 60 point patient reported outcome (PRO) score (where 12 indicates the best outcome) that evaluates the affected knee. The total score is composed of Pain and Function.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 114 subjects in the PFC Sigma Fixed Bearing and 111 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

American Knee Society (AKS) knee score is a 0-100 point score (where 100 indicates excellent knee condition) that evaluates the affected knee. The knee score is composed of Pain, Range of Motion, and Stability.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 154 subjects in the PFC Sigma Fixed Bearing and 143 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

American Knee Society (AKS) knee score is a 0-100 point score (where 100 indicates excellent knee condition) that evaluates the affected knee. The knee score is composed of Pain, Range of Motion, and Stability.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 152 subjects in the PFC Sigma Fixed Bearing and 143 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

American Knee Society (AKS) knee score is a 0-100 point score (where 100 indicates excellent knee condition) that evaluates the affected knee. The knee score is composed of Pain, Range of Motion, and Stability.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 122 subjects in the PFC Sigma Fixed Bearing and 120 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

American Knee Society (AKS) function score is a 0-100 point score (where 100 indicates excellent knee function) that evaluates the affected knee. The function score is composed of walking and stair climbing ability.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 155 subjects in the PFC Sigma Fixed Bearing and 144 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

American Knee Society (AKS) function score is a 0-100 point score (where 100 indicates excellent knee function) that evaluates the affected knee. The function score is composed of walking and stair climbing ability.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 154 subjects in the PFC Sigma Fixed Bearing and 146 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

American Knee Society (AKS) function score is a 0-100 point score (where 100 indicates excellent knee function) that evaluates the affected knee. The function score is composed of walking and stair climbing ability.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 124 subjects in the PFC Sigma Fixed Bearing and 125 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 170 subjects in the PFC Sigma Fixed Bearing and 161 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 170 subjects in the PFC Sigma Fixed Bearing and 161 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 130 subjects in the PFC Sigma Fixed Bearing and 118 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 139 subjects in the PFC Sigma Fixed Bearing and 130 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 107 subjects in the PFC Sigma Fixed Bearing and 109 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 130 subjects in the PFC Sigma Fixed Bearing and 118 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 139 subjects in the PFC Sigma Fixed Bearing and 130 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The 12-Item Short Form Health Survey (SF-12) is a patient reported outcome survey that represents overall subjective health status by measuring eight health-related parameters (each scored from 0 [poor health] to 100 [better health]): body pain, general mental health, perception of general health, physical functioning, role limitations caused by mental condition, role limitations caused by a physical condition, social functioning, and vitality. The survey is converted into 2 summary measures that are scored from 0 to 100 (where 100 indicates the highest level of health) - the Physical Component Score (PCS-12) and Mental Component Score (MCS-12).

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 107 subjects in the PFC Sigma Fixed Bearing and 109 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 152 subjects in the PFC Sigma Fixed Bearing and 141 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 153 subjects in the PFC Sigma Fixed Bearing and 144 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 122 subjects in the PFC Sigma Fixed Bearing and 122 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Tibial Radiolucency observes a radiolucent line (of 0.5mm or wider) on the radiograph around the tibial component.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Tibial Radiolucency observes a radiolucent line (of 0.5mm or wider) on the radiograph around the tibial component.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 170 subjects in the PFC Sigma Fixed Bearing and 161 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Tibial Radiolucency observes a radiolucent line (of 0.5mm or wider) on the radiograph around the tibial component.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Lateral release is a surgical procedure to release tight capsular structures (lateral retinaculum) on the outside of the kneecap (patella). It is performed during knee surgery and allows the kneecap to move smoothly in the center of the knee. Rate information was collected at time of study surgery.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Lateral release is a surgical procedure to release tight capsular structures (lateral retinaculum) on the outside of the kneecap (patella). It is performed during knee surgery and allows the kneecap to move smoothly in the center of the knee. Rate information was collected at time of study surgery.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 170 subjects in the PFC Sigma Fixed Bearing and 161 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Kaplan Meier survivorship analysis estimates the proportion of a population that will survive past a certain time avoiding a certain event. In this study, the event is removal of any component for any reason, also known as revision for any reason. Survival estimates are provided when 40 devices are left still being followed.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Kaplan Meier survivorship analysis estimates the proportion of a population that will survive past a certain time avoiding a certain event. In this study, the event is removal of any component for any reason, also known as revision for any reason. Survival estimates are provided when 40 devices are left still being followed.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 170 subjects in the PFC Sigma Fixed Bearing and 161 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Kaplan Meier survivorship analysis estimates the proportion of a population that will survive past a certain time avoiding a certain event. In this study, the event is removal of any component for any reason, also known as revision for any reason. Survival estimates are provided when 40 devices are left still being followed.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 176 subjects in the PFC Sigma Fixed Bearing and 176 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 88 subjects in the PFC Sigma Fixed Bearing and 89 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 88 subjects in the PFC Sigma Fixed Bearing and 87 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 88 subjects in the PFC Sigma Fixed Bearing and 89 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Anterior Knee Pain is assessed by the patient into 1 of 4 categories: None, Mild, Moderate, or Severe. The percentage of participants with no anterior knee pain is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 88 subjects in the PFC Sigma Fixed Bearing and 87 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 88 subjects in the PFC Sigma Fixed Bearing and 89 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 88 subjects in the PFC Sigma Fixed Bearing and 87 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 88 subjects in the PFC Sigma Fixed Bearing and 89 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

Quadriceps Strength is assessed by the patient into 1 of 3 categories: Good, Fair, or Poor. The percentage of participants with good quadriceps strength is reported in the data table.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 88 subjects in the PFC Sigma Fixed Bearing and 87 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 75 subjects in the PFC Sigma Fixed Bearing and 71 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.

The Patella Score is completed by the clinicians and assesses the anterior knee pain, quadriceps strength, ability to rise from a chair and stair climbing. The Patella Score ranges from 3 to 30 points with higher scores indicating better functionality and lower scores indicating poorer functionality.

Due to consent withdrawals, deaths, lost to follow up, revisions, subjects whose patella were resurfaced, mis-randomized, those who did not wish to continue in the study, and incomplete or unavailable assessments, 77 subjects in the PFC Sigma Fixed Bearing and 70 subjects in the PFC Sigma RP Treatment Groups were available for this outcome.