Intraoperative patellar maltracking and postoperative radiographic patellar malalignment were more frequent in cases of complete medial collateral ligament release in cruciate-retaining total knee arthroplasty.
Knee Surg Relat Res
; 33(1): 9, 2021 Mar 20.
Article
em En
| MEDLINE
| ID: mdl-33743836
ABSTRACT
BACKGROUND:
Patellar maltracking after total knee arthroplasty (TKA) can lead to significant patellofemoral complications such as anterior knee pain, increased component wear, and a higher risk of component loosening, patellar fracture, and instability. This study was to investigate the preoperative and operative variables that significantly affect patellar tracking after cruciate-retaining TKA.METHODS:
We studied 142 knee joints in patients who had undergone TKA the knees were dichotomized based on postoperative patellar tracking, which was evaluated on patellar skyline, axial-projection radiographs group 1, normal patellar tracking (lateral tilt ≤ 10° and displacement ≤ 3 mm) and group 2, patellar maltracking (lateral tilt > 10° or displacement > 3 mm). The patients' demographic data and clinical and radiographic measurements obtained before and after surgery were compared between the two groups.RESULTS:
Preoperative lateral patellar displacement was greater (4.1 ± 2.6 mm vs. 6.0 ± 3.5 mm), as was the frequency of medial collateral ligament (MCL) release (3/67 vs. 24/75) in group 2 than in group 1 (p < 0.001 and p < 0.001, respectively). The distal femur was cut in a greater degree of valgus in group 1 than in group 2. (6.3 ± 0.8° vs. 6.0 ± 0.8°) (p = 0.034).CONCLUSIONS:
Complete release of the MCL during surgery was associated with patellar maltracking (logistic regression p = 0.005, odds ratio = 20.592). Surgeons should attend to patellar tracking during surgery in medially tight knees. LEVEL OF EVIDENCE Retrospective comparative study, level III.
Texto completo:
1
Coleções:
01-internacional
Temas:
Geral
Base de dados:
MEDLINE
Idioma:
En
Revista:
Knee Surg Relat Res
Ano de publicação:
2021
Tipo de documento:
Article
País de afiliação:
Coréia do Sul