title: Tibial Slope is Highly Variable in Patients Undergoing Primary Total Knee Arthroplasty: Analysis of 13,546 Computed Tomography Scans.
abstract: The purpose of this study was to retrospectively measure with computed tomography (CT) the posterior tibial slope (PTS) to establish the average anatomy and the incidence of outliers in patients undergoing total knee arthroplasty (TKA). Our cohort included 13,546 arthritic patients: 8241 (61%) female; 5305 (39%) male. The average PTS angle was 7.2°±3.7° (range, -5° to 25°). The average of PTS angle of the males was 7.17°±3.82° and females was 7.24°±3.57°. A significant number of patients 35.0% (4149) were identified outliers in PTS. 1568 (11.6%) patients' PTS angle was less than 4°, 2581 (19.1%) patients' PTS angle was more than 10°. These data can be useful to determine optimum techniques and methodology to perform more accurate TKA.
authors: Shiley Center for Orthopaedic Research and Education, Scripps Clinic, La Jolla, California; Department of Orthopaedic Surgery, Balikesir University, Balikesir, Turkey.
authors: Gokhan
authors: G
authors: Meric
authors: Shiley Center for Orthopaedic Research and Education, Scripps Clinic, La Jolla, California; Department of Orthopaedic Surgery, Federal University of São Paulo, São Paulo, Brazil.
authors: Guilherme C
authors: GC
authors: Gracitelli
authors: DePuy Synthes, Warsaw, Indiana.
authors: Luke
authors: L
authors: Aram
authors: Christ Hospital, Cincinnatti, Ohio.
authors: Michael
authors: M
authors: Swank
authors: Department of Orthopaedic Surgery, University of California, San Diego School of Medicine, La Jolla, California; Department of Orthopaedic Surgery, Scripps Clinic, La Jolla, California.
authors: William D
authors: WD
authors: Bugbee
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D019645:Arthroplasty, Replacement, Knee; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D020370:Osteoarthritis, Knee / Q000601:surgery; D012016:Reference Values; D012189:Retrospective Studies; D013977:Tibia / Q000033:anatomy & histology* / Q000000981:diagnostic imaging*; D014057:Tomography, X-Ray Computed
keywords: knee anatomy; limb alignment; mechanical axis; posterior tibial slope; total knee arthroplasty