Takeshi Mochizuki1, Koichiro Yano2, Katsunori Ikari2, Ryo Hiroshima3, Ken Okazaki2. 1. Department of Orthopedic Surgery, Kamagaya General Hospital, 929-6 Hatsutomi, Kamagaya, Chiba, 273-0121, Japan. twmutamo@gmail.com. 2. Department of Orthopedic Surgery, Tokyo Women's Medical University, Tokyo, Japan. 3. Department of Orthopedic Surgery, Kamagaya General Hospital, 929-6 Hatsutomi, Kamagaya, Chiba, 273-0121, Japan.
Abstract
BACKGROUND: The aim of this study was to identify, during total knee arthroplasty surgery, the effect on patellar kinematics of different patellar component designs in the same patients. METHODS: This study enrolled 84 patients with osteoarthritis. Intraoperative X-rays were used to measure internal rotation angle, flexion angle and lateral tilt were at different knee flexion angles with dome-type or anatomic-type patellar components (ATTUNE®, DePuy). RESULTS: Significant differences from baseline between the two types of components occurred at 120° of the knee flexion in the internal rotation angle, at 90° and 120° of the knee flexion in the flexion angle, and at 60° of the knee flexion in the lateral tilt. CONCLUSION: This study revealed that the difference in patellar component design affects patellar kinematics. Therefore, the difference in patellar component design may affect patellar stability.
BACKGROUND: The aim of this study was to identify, during total knee arthroplasty surgery, the effect on patellar kinematics of different patellar component designs in the same patients. METHODS: This study enrolled 84 patients with osteoarthritis. Intraoperative X-rays were used to measure internal rotation angle, flexion angle and lateral tilt were at different knee flexion angles with dome-type or anatomic-type patellar components (ATTUNE®, DePuy). RESULTS: Significant differences from baseline between the two types of components occurred at 120° of the knee flexion in the internal rotation angle, at 90° and 120° of the knee flexion in the flexion angle, and at 60° of the knee flexion in the lateral tilt. CONCLUSION: This study revealed that the difference in patellar component design affects patellar kinematics. Therefore, the difference in patellar component design may affect patellar stability.
Entities:
Keywords:
Kinematics; Patellar component design; Total knee arthroplasty
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