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Three-dimensional component alignment and functional outcome in computer-navigated total knee arthroplasty: a

Paul Harvie¹, Karen Sloan, Richard J Beaver

¹Department of Elective Orthopaedics, Royal Perth Hospital, Perth, Western Australia.

The Journal of Arthroplasty

|February 15, 2011

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Computer navigation in total knee arthroplasty using Stryker Full Navigation and Stryker Articular Surface Mounted (ASM) systems showed similar component alignment and patient function. ASM navigation resulted in shorter operative times.

Area of Science:

Orthopedic surgery
Medical technology
Biomechanical engineering

Background:

Computer navigation enhances component alignment in total knee arthroplasty (TKA).
Various navigation systems are available, necessitating comparative studies.

Purpose of the Study:

To compare the Stryker Full Navigation and Stryker Articular Surface Mounted (ASM) navigation systems in TKA.
To evaluate 3-dimensional component alignment and patient function at one year post-surgery.

Main Methods:

Prospective, randomized study involving 40 patients undergoing TKA.
Comparison of fully navigated versus ASM-navigated TKA.
Assessment of 3D component alignment (Perth CT knee protocol) and function (Knee Society Scores).

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Main Results:

No statistically significant differences in 3D component alignment or patient function between the two navigation systems.
Significantly shorter operative time for the ASM navigation cohort compared to the fully navigated cohort (P = .001).

Conclusions:

Both Stryker navigation systems demonstrate comparable outcomes in TKA regarding alignment and function.
Surgeon preference is a key factor in selecting between fully navigated and ASM systems.