Clinical trial NCT04181216: Comparison of Anatomically Aligned and Conventional Total Knee Arthroplasty in the Same Patients
Official title: Comparison of Anatomically Aligned and Conventional Total Knee Arthroplasty in the Same Patients
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Knee Osteoarthritis
Anatomically Aligned Total Knee Arthroplasty
Lead sponsor: The Catholic University of Korea
Sponsor class: OTHER
First posted: 2019-11-29
Enrollment: 100
Sex: ALL
Minimum age (years): 19
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: PARALLEL
Primary purpose: TREATMENT

Brief summary: Total knee arthroplasty(TKA) is a successful orthopedic surgery with excellent clinical outcome and survival. However, there are concerns about patient satisfaction in previous reports, and dissatisfaction rate of 15-30% is reported in clinical outcomes(PROMs) of some studies. Therefore, for improving the patient's outcome and satisfaction after total knee arthroplasty, it is necessary to change the design of the conventional total knee arthroplsaty implant. The knee is a joint structure with several dynamic functions, and not only the skeletal structure but also the soft tissue balance plays an important role in the function of the knee joint. New implants are being developed to overcome the limitations of conventional TKA implant, including the Journey II Bi-cruciate substituting total knee system (JII-BCS; Smith \& Nephew). JII-BCS implant has normal articular geometry, more anatomical femoral shape, lateral tibial convex geometry, and asymmetrical tibial plateau, anterior and posterior cams, which has been shown in experimental studies to produce nearly normal knee movement by reproducing the actual normal anatomical alignment in vivo.

The clinical results of the kinematic effects of this anatomcally aligned change are insufficient, and there is also a lack of comparative studies with conventional total knee arthroplasty implant. The purpose of this study is to compare outcomes between anatomically aligned TKA(JII-BCS) and conventional TKA(Legion total knee system, Smith \& Nephew). This study is a randomized controlled study in patients undergoing total knee arthroplasty per day. Radiologic parameter, patients preference and clinical results was investigated in both knee of same patients who received TKA during minimum 2 year follow up.


Eligibility criteria: Inclusion Criteria:

* Patients for bilateral total knee arthroplasty
* having medicare insurance

Exclusion Criteria:

* Rheumatoid arthritis
* Other inflammatory arthritis
* Crystal-induced arthritis
* Septic arthritis
* Neuropsychiatric patients
* Previous knee operation history
* Neuropsychiatric patients
* Patients with preoperative severe limitation of motion (Flexion contracture ≥ 20, range of motion ≤ 90)
* Patients with preoperative severe defomity of knee alignment (Varus or valgus angle ≥ 15)
* Severe obese patients (BMI ≥ 40)

Primary outcomes:
measure: Change in Western Ontario and McMaster Universities Index(WOMAC index)
timeFrame: Change from baseline score to score of postoperative1 year
Secondary outcomes:
measure: Change in Knee Society Score
timeFrame: Change from baseline score to score of postoperative1 year
measure: Change in Range of Motion
timeFrame: Change from baseline Range of Motion at postoperative1 year
Other outcomes:
Locations:
Study officials:
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