Planning a total knee arthroplasty through an application for mobile devices: case report

Area of Science:

• Orthopedic Surgery
• Biomedical Engineering
• Medical Device Technology

Background:

• Component malalignment is a primary cause of failure in total knee arthroplasty (TKA).
• Achieving neutral mechanical alignment is crucial for successful TKA outcomes.
• Advanced knee arthrosis necessitates effective surgical planning and prosthetic solutions.

Observation:

• A case of advanced knee arthrosis was treated with primary TKA.
• Preoperative planning utilized a novel mobile application.
• A specialized implant, inspired by the "modified GAP" theory with a rotated tibial tray, was employed.

Findings:

• The mobile application facilitated precise preoperative planning for the TKA.
• The surgical procedure successfully achieved neutral mechanical alignment of the lower limbs.
• The patient-specific plan, executed with the modified implant, proved viable for this complex case.

Implications:

• Mobile applications offer a viable tool for enhancing TKA preoperative planning.
• The "modified GAP" implant concept with tibial tray rotation may improve TKA alignment.
• This approach could potentially reduce TKA failures attributed to component malalignment.