Anatomic vs Dome Patella: Is There a Difference Between Fixed- vs Mobile-Bearing Posterior-Stabilized Total Knee Arthroplasties?
| Autor: | M LaCour, Douglas A. Dennis, Richard D. Komistek, Lauren A. Smith |
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| Rok vydání: | 2021 |
| Předmět: |
musculoskeletal diseases
Orthodontics Knee Joint medicine.diagnostic_test business.industry Total knee arthroplasty Posterior stabilized Patella Kinematics musculoskeletal system Condyle Dome (geology) Humans Medicine Fluoroscopy Orthopedics and Sports Medicine Range of Motion Articular Arthroplasty Replacement Knee Knee Prosthesis business Range of motion |
| Zdroj: | The Journal of Arthroplasty. 36:3773-3780 |
| ISSN: | 0883-5403 |
| DOI: | 10.1016/j.arth.2021.07.006 |
| Popis: | Background It has been hypothesized that the patella, working in conjunction with both medial and lateral femoral condyles, can influence kinematic parameters such as posterior femoral rollback and axial rotation. The objective of this study is to determine the in vivo kinematics of subjects implanted with a fixed-bearing (FB) or mobile-bearing (MB) posterior-stabilized (PS) total knee arthroplasty (TKA), with a specific focus on evaluating the impact that Anatomic and Medialized Dome patellar components have on tibiofemoral kinematic patterns. Methods Tibiofemoral kinematics were assessed for 40 subjects; 20 with an anatomic patella and 20 with a dome patella. Within these groups, 10 subjects received an FB PS TKA and 10 subjects received an MB PS TKA. All subjects were analyzed using fluoroscopy while performing a deep knee bend activity. Kinematics were collected during specific intervals to determine similarities and differences in regard to patella and bearing type. Results The greatest variation in kinematics was detected between the 2 Anatomic patellar groups. Specifically, the MB-Anatomic subjects experienced greater translation of the lateral condyle, the highest magnitude of axial rotation, and the highest range of motion compared to the FB-Anatomic subjects. Subjects with a Dome Patella displayed much variability among the average kinematics, with all parameters between FB and MB cohorts being similar. Conclusion The findings in this study suggest that subjects with an Anatomic patellar component could have more normal kinematic patterns with an MB PS TKA as opposed to an FB PS TKA, while subjects with a Dome patella could achieve similar kinematics regardless of TKA type. |
| Databáze: | OpenAIRE |
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