The role of flexion contracture on outcomes in primary total knee arthroplasty.
This study examined the role that flexion contracture plays in postoperative outcomes after total knee arthroplasty using a retrospective database review. The relationships between preoperative and postoperative knee extension, walking ability, stair climbing ability, Knee Society scores, pain scores, and knee function scores were studied in 5,622 knees. A preoperative flexion contracture was associated with an increased incidence of a persistent postoperative flexion deformity. A postoperative flexion contracture was associated with poorer postoperative results. Furthermore, a postoperative hyperextension deformity of greater than 10 degrees was associated with an increased risk of suboptimal pain and Knee Society scores. Knee extension deformities play a substantial detrimental role in the functional outcome of primary total knee arthroplasty.
Ritter
Merrill A
MA
The Center for Hip and Knee Surgery, St. Francis Hospital, Mooresville, Mooresville, Indiana 46158, USA.
Lutgring
Joseph D
JD
Davis
Kenneth E
KE
Berend
Michael E
ME
Pierson
Jeffery L
JL
Meneghini
R Michael
RM
D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D003286:Contracture / Q000150:complications* / Q000503:physiopathology; D005260:Female; D006801:Humans; D007719:Knee Joint / Q000503:physiopathology; D008297:Male; D008875:Middle Aged; D016059:Range of Motion, Articular; D012189:Retrospective Studies; D016896:Treatment Outcome