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Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint
Open accessAbstract
Objective: To demonstrate the effect of the screw‐home motion on the stability of the patellofemoral joint, and investigate its mechanism of regulation of patellar tracking. Methods: Twenty volunteers who met the criteria were examined. All subjects had axial computed tomography ( CT) scanning performed on bilateral knees at 0° and 30° of flexion. Scanning began above the femorotibial articulation and femoral trochlear groove, and moved sequentially down to the level of the anterior tibial tubercle. The following measurements were obtained: tibial rotation relative to the femur ( TRRF ), tibial tuberosity–trochlear groove ( TT – TG ) distance, lateral patellar displacement ( LPD ), patellar tilt angle ( PTA ), and congruence angle ( CA ). We assessed the change (Δ) in each variable at both flexion angles, and analyzed this to investigate the corresponding relationship between the patella, the femur, and the screw‐home mechanism. The differences between the values measured at 0° and those measured at 30° flexion were analyzed using the paired sample t ‐test. The differences between men and women were analyzed using the t ‐test. Pearson’s correlations were performed to determine the relationship between Δ TT – TG distance and Δ LPD , Δ PTA and Δ TRRF , and Δ CA and Δ TRRF . Results: There were 10 women and 10 men enrolled in the present study, with an average age of 25 years and an average body mass index of 21.8 kg/m 2 , and all volunteers had no history of knee injuries. Compared with measurements taken at 0° flexion, TRRF at 30° flexion was significantly increased, and the PTA , CA , LPD , and TT – TG distance were significantly decreased (all P < 0.01). There was no difference between men and women at 0° and 30° flexion, respectively ( P < 0.01). In this respect, there was no sex difference, but the change was greater for men than for women. Both Δ PTA and Δ CA demonstrated significant correlation with the Δ TRRF (both P < 0.01); a significant correlation between Δ LPD and Δ TT–TG distance was also demonstrated ( P < 0.01). Conclusions: As the tibiofemoral joint rotated, the patellofemoral joint became more stable and aligned, which indicates that the screw‐home mechanism plays an important role in regulating patellofemoral joint alignment.
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Metadata
- Authors
- Zhang, L., Wang, X., Niu, Y., Liu, H., & Wang, F.
- Affiliations
- Third Hospital of Hebei Medical University (CN)
- Department of Orthopedics Third Hospital of Hebei Medical University Shijiazhuang China
- Corresponding author
- Wang, Fei
- ORCID
- Wang, Fei
- Venue
- Orthopaedic Surgery
- Publisher
- Wiley
- Published
- 2016-11
- Volume
- 8
- Issue
- 4
- Pages
- 490-495
- ISSN
- 1757-7853 (ISSN-L)
- 1757-7861
- PMC
- PMC6584384
- OpenAlex
- W2565449875
- Cited by
- 34
- References
- 38
- Citations by year
- 2026: 5 · 2025: 3 · 2024: 2 · 2023: 4 · 2022: 10 · 2021: 4 · 2020: 2 · 2019: 2 · 2018: 1 · 2017: 1
- FWCI
- 0.64
- Type
- journal article
- Language
- en
- Open access
- bronze
- doi.org
- Locations
- Orthopaedic Surgery (publishedVersion)
- PubMed Central (publishedVersion)
- PubMed (publishedVersion)
- Topics
- Physical Sciences › Engineering › Biomedical Engineering › Lower Extremity Biomechanics and Pathologies
- Health Sciences › Medicine › Surgery › Knee injuries and reconstruction techniques
- Health Sciences › Medicine › Surgery › Total Knee Arthroplasty Outcomes
- Keywords
- patellar tracking, screw-home mechanism, tibiofemoral joint, knee flexion, tibial rotation, tibial tubercle-trochlear groove distance, lateral patellar displacement, patellar tilt angle, congruence angle, sex differences
- MeSH terms
- Adult, Biomechanical Phenomena, Female, Femur, Humans, Male, Patella, Rotation, Tibia, Tomography, X-Ray Computed, Range of Motion, Articular, Patellofemoral Joint, Healthy Volunteers
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- Zhang, L., Wang, X., Niu, Y., Liu, H., & Wang, F. (2016). Relationship between Patellar Tracking and the “Screw‐home” Mechanism of Tibiofemoral Joint. Orthopaedic Surgery. https://doi.org/10.1111/os.12295
