title: High flexion knee arthroplasty: the relationship between rotational angles and flexion angle after total knee arthroplasty.
abstract: The current patients required high flexion total knee arthroplasty (TKA). We hypothesized the patients who would get the high rotational angle just after TKA could gain high flexion knee 1 year after TKA. Sixty-three patients (average age: 70.6 years) were examined. In order to examine between the intraoperative rotational angles and the gained flexion angles after TKA, the patients were divided into two groups: the H group (more than 120°) and the L groups (less than 120°) by the gained flexion angles. The relationship between the flexion angles at 1 year after surgery and the intraoperative rotational angle had no significant correlation. But the rotational angles in the L group tended to be higher than the ones in the H group, and at only 30°, the L group gained significantly more rotational angle than the H group. These results might show that a tighter rotational stability induces a gain of higher flexion knee after TKA.
authors.affiliation: Institute of Biomechanical and Health Sciences, Laboratory of Musculoskeletal Functional Research and Regeneration, Hiroshima University, 1-2-3 Kasumi, Minami-ku, Hiroshima, Japan, 734-8553, snm3@hiroshima-u.ac.jp.
authors.forename: Masataka
authors.initials: M
authors.lastname: Deie
authors.forename: Tomoyuki
authors.initials: T
authors.lastname: Nakasa
authors.forename: Goki
authors.initials: G
authors.lastname: Kamei
authors.forename: Atsuo
authors.initials: A
authors.lastname: Nakamae
authors.forename: Mitsuo
authors.initials: M
authors.lastname: Ochi