title: Electromagnetic navigation in total knee arthroplasty-a single center, randomized, single-blind study comparing the results with conventional techniques.
abstract: We report on the results of a randomized study (n=200) to compare total knee arthroplasty performed using conventional instrumentation or electromagnetic computer assisted surgical technique. 92% of navigated and 85% of conventional knees were implanted within ±3° from neutral mechanical alignment; there was no statistically significant difference between these proportions. There was also no difference in femoral or tibial rotation assessed by CT scan. At 1year follow up there was no statistical difference between the two groups in American Knee Society Score, Oxford Knee Scores, patient satisfaction, quality of life, hospital length of stay, complication rates or other adverse events. Tourniquet time in the navigated group was longer. Proving value for navigation in total knee arthroplasty surgery remains a challenge.
authors.affiliation: Orthopaedic Research Unit, Glasgow Royal Infirmary, Gatehouse Building, Glasgow.
authors.forename: Mark J G
authors.initials: MJ
authors.lastname: Blyth
authors.affiliation: Bioengineering Unit, University of Strathclyde, Wolfson Building, Glasgow.
authors.forename: Julie R
authors.initials: JR
authors.lastname: Smith
authors.affiliation: Orthopaedic Research Unit, Glasgow Royal Infirmary, Gatehouse Building, Glasgow.
authors.forename: Iain C
authors.initials: IC
authors.lastname: Anthony
authors.affiliation: Orthopaedic Department, Southern Cross Hospital, Hamilton, New Zealand.
authors.forename: Neville E
authors.initials: NE
authors.lastname: Strict
authors.affiliation: Bioengineering Unit, University of Strathclyde, Wolfson Building, Glasgow.
authors.forename: Philip J
authors.initials: PJ
authors.lastname: Rowe
authors.affiliation: Orthopaedic Research Unit, Glasgow Royal Infirmary, Gatehouse Building, Glasgow.
authors.forename: Bryn G
authors.initials: BG
authors.lastname: Jones
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D055590:Electromagnetic Phenomena; D005260:Female; D005269:Femur / Q000601:surgery; D006801:Humans; D007719:Knee Joint / Q000601:surgery*; D007720:Knee Prosthesis; D008297:Male; D008875:Middle Aged; D011788:Quality of Life; D012399:Rotation; D016037:Single-Blind Method; D025321:Surgery, Computer-Assisted; D013977:Tibia / Q000601:surgery; D014057:Tomography, X-Ray Computed
keywords: EM navigation; clinical outcome; mechanical alignment; randomized controlled trial; surgical accuracy; total knee arthroplasty