Comput. Aided Surg. - Intra-operative reliability of ShapeMatch cutting guide placement in total knee arthroplasty.

Tópicos

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Resumo

Custom cutting guides based on pre-operative imaging have been introduced for total knee arthroplasty (TKA). The aim of this prospective cohort study was to assess the reliability of repeated placement of custom cutting guides by multiple surgeons in a group of patients undergoing TKA. Custom cutting guides (ShapeMatch?, Stryker Orthopaedics) were designed from pre-operative MRI scans. The treating surgeon placed each guide on the femur and tibia of each patient three times without pinning the block. The three-dimensional position and orientation of the guide was measured for each repetition using a computer navigation system. The surgeon was blinded to the navigation system display. Data from 24 patients and 6 surgeons were analyzed. Intraclass correlation coefficients for all measurement parameters were in the range 0.889-0.997 (excellent), and all comparisons were statistically significant (p < 0.001). The range for femoral varus/valgus was 0.0-1.5?, with 96% of patients being within 0.5?. For femoral flexion/extension the range was 0.0-3.5? (92% within 2.5?). On the tibia, varus/valgus had a range of 0.0-1.0? (92% within 0.5?), and for slope the range was 0.0-3.5? (92% within 2.5?). The high degree of agreement indicated that intra-surgeon variation was minimal and that the technique is reliable.

Resumo Limpo

custom cut guid base preoper imag introduc total knee arthroplasti tka aim prospect cohort studi assess reliabl repeat placement custom cut guid multipl surgeon group patient undergo tka custom cut guid shapematch stryker orthopaed design preoper mri scan treat surgeon place guid femur tibia patient three time without pin block threedimension posit orient guid measur repetit use comput navig system surgeon blind navig system display data patient surgeon analyz intraclass correl coeffici measur paramet rang excel comparison statist signific p rang femor varusvalgus patient within femor flexionextens rang within tibia varusvalgus rang within slope rang within high degre agreement indic intrasurgeon variat minim techniqu reliabl

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