Tibial tubercle torsion is associated with patellar height when measured by computed tomography
Abstract Purpose To establish an average tibial tubercle (TT) torsion angle from computed tomography (CT) scans of patients without known patellofemoral instability and investigate whether TT torsion angles would differ based on demographics, tibial tubercle‐trochlear groove (TT‐TG) distance and pat...
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| Format: | Article |
| Language: | English |
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Wiley
2025-04-01
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| Series: | Journal of Experimental Orthopaedics |
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| Online Access: | https://doi.org/10.1002/jeo2.70258 |
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| author | Joseph D. Giusto Janina Kaarre Yongji Kim Jae‐Sung An Sally LiArno Faizan Ahmad Matthieu Ollivier |
| author_facet | Joseph D. Giusto Janina Kaarre Yongji Kim Jae‐Sung An Sally LiArno Faizan Ahmad Matthieu Ollivier |
| author_sort | Joseph D. Giusto |
| collection | DOAJ |
| description | Abstract Purpose To establish an average tibial tubercle (TT) torsion angle from computed tomography (CT) scans of patients without known patellofemoral instability and investigate whether TT torsion angles would differ based on demographics, tibial tubercle‐trochlear groove (TT‐TG) distance and patellar height. Methods The Stryker Orthopaedics Modeling and Analytics (SOMA) database was queried for patients with CT scans and available measures related to patella and TT position. The mean TT torsion angle was compared in patients with an increased and normal TT‐TG distance (≥20 vs. <20 mm) and patellar height (Insall–Salvati [IS] index ≥1.3 vs. <1.3). Measurements of sulcus angle, patellar inclination angle, congruence angle, trochlear groove depth and long limb axis alignment were assessed. Results A total of 886 knees from 499 patients within the SOMA database were included, with a mean age of 59.4 ± 16.5 years and 238 (48%) females. The mean TT torsion angle for all patients was 24.7 ± 5.2°. Females had a significantly higher mean IS index (1.24 vs. 1.18), TT‐TG distance (13.8 mm vs. 11.8 mm) and TT torsion angle (25.5° vs. 24.0°) compared to males. The mean TT torsion angle for patients with a TT‐TG distance ≥20 mm and <20 mm was 24.7° in both groups (p = n.s.). There was a significantly greater TT torsion angle in patients with an IS index ≥1.3 (26.6°) compared to those with an IS index <1.3 (24.0°) (p < 0.001). A weak and positive correlation was found between TT torsion angle and IS index (r = 0.242, p < 0.001), but not with other measurements. Conclusion The mean TT torsion angle for patients without known patellofemoral instability was 24.7° and increased TT torsion angles were associated with increased patellar height. An association between TT torsion and TT‐TG was not found. Findings of the current study describe the relationship between morphologic assessments of the patellofemoral joint using CT. Level of Evidence Level IV, cohort study. |
| format | Article |
| id | doaj-art-5840aa463d2d47418c97990600a561bd |
| institution | Kabale University |
| issn | 2197-1153 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Wiley |
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| series | Journal of Experimental Orthopaedics |
| spelling | doaj-art-5840aa463d2d47418c97990600a561bd2025-08-20T04:03:13ZengWileyJournal of Experimental Orthopaedics2197-11532025-04-01122n/an/a10.1002/jeo2.70258Tibial tubercle torsion is associated with patellar height when measured by computed tomographyJoseph D. Giusto0Janina Kaarre1Yongji Kim2Jae‐Sung An3Sally LiArno4Faizan Ahmad5Matthieu Ollivier6Department of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center University of Pittsburgh Medical Center Pittsburgh Pennsylvania USADepartment of Orthopaedic Surgery, UPMC Freddie Fu Sports Medicine Center University of Pittsburgh Medical Center Pittsburgh Pennsylvania USAInstitut du Mouvement et de l'appareil Locomoteur (IML) Hôpital Sainte‐Marguerite, AP‐HM Marseille FranceInstitut du Mouvement et de l'appareil Locomoteur (IML) Hôpital Sainte‐Marguerite, AP‐HM Marseille FranceStryker Mahwah New Jersey USAStryker Mahwah New Jersey USAInstitut du Mouvement et de l'appareil Locomoteur (IML) Hôpital Sainte‐Marguerite, AP‐HM Marseille FranceAbstract Purpose To establish an average tibial tubercle (TT) torsion angle from computed tomography (CT) scans of patients without known patellofemoral instability and investigate whether TT torsion angles would differ based on demographics, tibial tubercle‐trochlear groove (TT‐TG) distance and patellar height. Methods The Stryker Orthopaedics Modeling and Analytics (SOMA) database was queried for patients with CT scans and available measures related to patella and TT position. The mean TT torsion angle was compared in patients with an increased and normal TT‐TG distance (≥20 vs. <20 mm) and patellar height (Insall–Salvati [IS] index ≥1.3 vs. <1.3). Measurements of sulcus angle, patellar inclination angle, congruence angle, trochlear groove depth and long limb axis alignment were assessed. Results A total of 886 knees from 499 patients within the SOMA database were included, with a mean age of 59.4 ± 16.5 years and 238 (48%) females. The mean TT torsion angle for all patients was 24.7 ± 5.2°. Females had a significantly higher mean IS index (1.24 vs. 1.18), TT‐TG distance (13.8 mm vs. 11.8 mm) and TT torsion angle (25.5° vs. 24.0°) compared to males. The mean TT torsion angle for patients with a TT‐TG distance ≥20 mm and <20 mm was 24.7° in both groups (p = n.s.). There was a significantly greater TT torsion angle in patients with an IS index ≥1.3 (26.6°) compared to those with an IS index <1.3 (24.0°) (p < 0.001). A weak and positive correlation was found between TT torsion angle and IS index (r = 0.242, p < 0.001), but not with other measurements. Conclusion The mean TT torsion angle for patients without known patellofemoral instability was 24.7° and increased TT torsion angles were associated with increased patellar height. An association between TT torsion and TT‐TG was not found. Findings of the current study describe the relationship between morphologic assessments of the patellofemoral joint using CT. Level of Evidence Level IV, cohort study.https://doi.org/10.1002/jeo2.70258CTInsall‐Salvati indexpatellar heightpatellar instabilitytibial tubercle torsionTTTG |
| spellingShingle | Joseph D. Giusto Janina Kaarre Yongji Kim Jae‐Sung An Sally LiArno Faizan Ahmad Matthieu Ollivier Tibial tubercle torsion is associated with patellar height when measured by computed tomography Journal of Experimental Orthopaedics CT Insall‐Salvati index patellar height patellar instability tibial tubercle torsion TTTG |
| title | Tibial tubercle torsion is associated with patellar height when measured by computed tomography |
| title_full | Tibial tubercle torsion is associated with patellar height when measured by computed tomography |
| title_fullStr | Tibial tubercle torsion is associated with patellar height when measured by computed tomography |
| title_full_unstemmed | Tibial tubercle torsion is associated with patellar height when measured by computed tomography |
| title_short | Tibial tubercle torsion is associated with patellar height when measured by computed tomography |
| title_sort | tibial tubercle torsion is associated with patellar height when measured by computed tomography |
| topic | CT Insall‐Salvati index patellar height patellar instability tibial tubercle torsion TTTG |
| url | https://doi.org/10.1002/jeo2.70258 |
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