title: Re-learning curve for conventional total knee arthroplasty following 30 consecutive computer-assisted total knee arthroplasties.
abstract: A learning curve for returning to conventional total knee arthroplasty (TKA) after using computer-assisted (CAS) TKA has not yet been established. In this study, the postoperative mechanical axes of the first 30 consecutive CAS TKAs performed by a single surgeon were compared to his subsequent 120 conventionally performed TKAs. A "re-learning curve" of 30 conventional TKAs was necessary to attain an average postoperative mechanical axis statistically indistinguishable from the average CAS mechanical axis (1.99°). This is a trend of which surgeons should be aware when converting from CAS TKA to conventional TKA. As a secondary goal, the authors identify the first clinical parameter, preoperative deviation from neutral mechanical axis, that may potentially serve as a guide for the selective use of CAS in TKA.
authors: Department of Orthopaedics, Tufts Medical Center/Tufts University School of Medicine, Boston, MA 02111, USA.
authors: Luke T
authors: LT
authors: Nicholson
authors: David
authors: D
authors: Trofa
authors: Eric
authors: E
authors: Smith
mesh_terms: D019645:Arthroplasty, Replacement, Knee / Q000193:education* / Q000379:methods; D005260:Female; D006801:Humans; D007396:Internship and Residency / Q000379:methods*; D059032:Learning Curve; D008297:Male; D008875:Middle Aged; D009985:Orthopedics / Q000193:education*; D012372:ROC Curve; D012189:Retrospective Studies; D025321:Surgery, Computer-Assisted