title: High-flex posterior cruciate-retaining vs posterior cruciate-substituting designs in simultaneous bilateral total knee arthroplasty: a prospective, randomized study.
abstract: The superiority between the posterior cruciate-retaining and the posterior cruciate-substituting designs still remains controversial. We performed a prospective, randomized control study for evaluation of the superiority of these designs. This study investigated 58 knees in 29 patients with simultaneous bilateral total knee arthroplasty, in which the high-flex CR design was randomly implanted in one knee and the high-flex PS design was implanted in the other knee. The follow-up duration averaged 5.0 years, with a minimum duration of 3 years. Postoperatively, Knee Score and pain points in Knee Score resulted in no significant differences between the 2 designs. However, postoperative arc of range of motion, patient satisfaction, and posterior knee pain at passive flexion in the PS design were significantly superior to that of the CR design.
authors.affiliation: Department of Orthopaedic Surgery, Tokyo Medical and Dental University, Tokyo, Japan.
authors.forename: Kazuyoshi
authors.initials: K
authors.lastname: Yagishita
authors.forename: Takeshi
authors.initials: T
authors.lastname: Muneta
authors.forename: Young-Jin
authors.initials: YJ
authors.lastname: Ju
authors.forename: Toshiyuki
authors.initials: T
authors.lastname: Morito
authors.forename: Junya
authors.initials: J
authors.lastname: Yamazaki
authors.forename: Ichiro
authors.initials: I
authors.lastname: Sekiya
mesh_terms: D000368:Aged; D019645:Arthroplasty, Replacement, Knee / Q000379:methods*; D005260:Female; D006801:Humans; D007720:Knee Prosthesis; D008297:Male; D016119:Posterior Cruciate Ligament; D011446:Prospective Studies; D011474:Prosthesis Design; D016059:Range of Motion, Articular