title: Is latero-medial patellar mobility related to the range of motion of the knee joint after total knee arthroplasty?
abstract: Diminished range of motion (ROM) of the knee joint after total knee arthroplasty (TKA) is thought to be related to reduced patellar mobility. This has not been confirmed clinically due to a lack of quantitative methods adequate for measuring patellar mobility. We investigated the relationship between patellar mobility by a reported quantitative method and knee joint ROM after TKA. Forty-nine patients [osteoarthritis--OA: 29 knees; rheumatoid arthritis--RA: 20 knees] were examined after TKA. Respective medial and lateral patellar mobility was measured 1 and 6 months postoperatively using a patellofemoral arthrometer (PFA). Knee joint ROM was also measured in each of those 2 sessions. Although the flexion and extension of the knee joints improved significantly from 1 to 6 months after TKA, the medial and lateral patellar displacements (LPDs) failed to improve during that same period. Moreover, only the changes in knee flexion and medial patellar displacement (MPD) between the two sessions were positively correlated (r = 0.31, p < 0.05). However, our findings demonstrated that medial and lateral patellar mobility had no sufficient longitudinal relationship with knee ROM after TKA.
authors: Department of Physical Therapy, School of Health Sciences, Nagoya University, 1-1-20 Daikominami, Higashi-ku, Nagoya, Aichi 461-8673, Japan. s-ota@met.nagoya-u.ac.jp
authors: Susumu
authors: S
authors: Ota
authors: Takeshi
authors: T
authors: Nakashima
authors: Ayako
authors: A
authors: Morisaka
authors: Takaaki
authors: T
authors: Omachi
authors: Kunio
authors: K
authors: Ida
authors: Morio
authors: M
authors: Kawamura
mesh_terms: D000328:Adult; D053587:Arthrometry, Articular; D019645:Arthroplasty, Replacement, Knee / Q000009:adverse effects*; D005260:Female; D005500:Follow-Up Studies; D006801:Humans; D007593:Joint Instability / Q000209:etiology* / Q000503:physiopathology*; D007719:Knee Joint / Q000503:physiopathology*; D008297:Male; D008875:Middle Aged; D010329:Patella / Q000503:physiopathology*; D017847:Patellar Ligament / Q000503:physiopathology*; D010808:Physical Examination; D016059:Range of Motion, Articular; D015203:Reproducibility of Results