title: Factors affecting patellar tracking after total knee arthroplasty.
abstract: This study examined factors that influence patellar tracking after total knee arthroplasty. A total of 62 knees were evaluated radiographically for postoperative patellar tracking. Six factors were examined regarding their influence on postoperative patellar tracking. This study showed the effects of patellar component position, patellar resection angle, and lateral retinacular release on postoperative patellar tracking. There was no significant effect of the remaining 3 factors: the thickness of the patellar resection, preoperative patellar tilt, and rotational alignment of the femoral component. A medialized patellar component and obliquity of resection of the patella are effective for obtaining proper patellar tracking, whereas the evaluation of the influence of the external rotation of the femoral component requires more clinical studies.
authors.affiliation: Department of Orthopaedic Surgery, Graduate School of Medical Sciences, Kyushu University, Fukuoka, Japan.
authors.forename: Tsutomu
authors.initials: T
authors.lastname: Kawano
authors.forename: Hiromasa
authors.initials: H
authors.lastname: Miura
authors.forename: Ryuji
authors.initials: R
authors.lastname: Nagamine
authors.forename: Ken
authors.initials: K
authors.lastname: Urabe
authors.forename: Shuichi
authors.initials: S
authors.lastname: Matsuda
authors.forename: Taro
authors.initials: T
authors.lastname: Mawatari
authors.forename: Takaaki
authors.initials: T
authors.lastname: Moro-Oka
authors.forename: Yukihide
authors.initials: Y
authors.lastname: Iwamoto
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D001172:Arthritis, Rheumatoid / Q000601:surgery; D019645:Arthroplasty, Replacement, Knee; D001696:Biomechanical Phenomena; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery; D010329:Patella / Q000503:physiopathology*; D011184:Postoperative Period