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- Title
Patella baja after unicompartmental knee arthroplasty.
- Authors
Anagnostakos, Konstantinos; Lorbach, Olaf; Kohn, Dieter
- Abstract
Purpose: The literature data on patellar height following unicompartmental knee arthroplasty (UKA) are scarce. Methods: A total of 41 knee joints in 37 patients after UKA were prospectively evaluated for patellar height by using the Insall-Salvati and modified Insall-Salvati ratio. Patellar height was measured preoperatively, postoperatively, at 6, 12 weeks, and, at 1 year postoperatively. Patients were categorized according to age, gender, operated side, and rehabilitation program. Results: Regarding all the patients, the Insall-Salvati ratio demonstrated a significant decrease only for the time period 'postoperatively-1 year postoperatively', whereas the modified Insall-Salvati ratio showed a significant decrease only for the period 'preoperatively-postoperatively'. The Insall-Salvati ratio showed a significant decrease in the patellar height of men and left knees, whereas the modified Insall-Salvati ratio revealed a significant decrease in patients older than 65 years and those who followed a specific rehabilitation program. Conclusions: The decrease in the patellar height after UKA occurs within the first postoperative year. Women, right knees, patients younger than 65 years and those who do not follow a specific rehabilitation program are less prone to decrease in the patellar height; ratio-specific differences are evident for each subgroup. Level of evidence: Diagnostic study, Level III.
- Subjects
PATELLA; ARTHROPLASTY; JOINT surgery; REHABILITATION; LEG; PATIENTS
- Publication
Knee Surgery, Sports Traumatology, Arthroscopy, 2012, Vol 20, Issue 8, p1456
- ISSN
0942-2056
- Publication type
Article
- DOI
10.1007/s00167-011-1689-4