title: A mini-midvastus capsular approach with patellar displacement decreases the prevalence of patella baja.
abstract: Our aim in this study was to evaluate the prevalence of patella baja after total knee arthroplasty (TKA) using 2 different surgical techniques. Postoperative changes in patella height were measured on serial radiographs of 74 TKAs implanted using a mini-midvastus capsular approach without patella eversion (group 1) and 57 TKAs implanted using a standard medial parapatellar capsular approach with patella eversion (group 2). Preoperative and postoperative Knee Society scores, operative data, and complications were compared. With a cutoff level of 5% shortening, the prevalence was 12% in group 1 and 37% in group 2 (P = .001). The presence of patella baja was related to reduced flexion and increased pain as early as 1 year after TKA.
authors.affiliation: Hospital for Special Surgery, New York, New York 10021, USA.
authors.forename: Markus
authors.initials: M
authors.lastname: Flören
authors.forename: Jack
authors.initials: J
authors.lastname: Davis
authors.forename: Margaret G E
authors.initials: MG
authors.lastname: Peterson
authors.forename: Richard S
authors.initials: RS
authors.lastname: Laskin
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D006801:Humans; D010149:Postoperative Pain; D010329:Patella / Q000000981:diagnostic imaging / Q000473:pathology*; D011183:Postoperative Complications; D015995:Prevalence; D011859:Radiography