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Evaluation of Trochlear Dysplasia Severity Using Trochlear Angle: A Retrospective Study Based on Computed Tomography (CT) Scans

BACKGROUND: Trochlear dysplasia is an important pathological factor in patellofemoral instability. Quantitative evaluation of the severity of trochlear dysplasia is rare and remains unclear. MATERIAL/METHODS: Computed tomography (CT) data on 136 knees (95 patients) with trochlear dysplasia in the ca...

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Autores principales: Dong, Zhenyue, Niu, Yingzhen, Duan, Guman, Song, Yifan, Qi, Jianchao, Wang, Fei
Formato: Online Artículo Texto
Lenguaje:English
Publicado: International Scientific Literature, Inc. 2018
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6067015/
https://www.ncbi.nlm.nih.gov/pubmed/30036357
http://dx.doi.org/10.12659/MSM.908102
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author Dong, Zhenyue
Niu, Yingzhen
Duan, Guman
Song, Yifan
Qi, Jianchao
Wang, Fei
author_facet Dong, Zhenyue
Niu, Yingzhen
Duan, Guman
Song, Yifan
Qi, Jianchao
Wang, Fei
author_sort Dong, Zhenyue
collection PubMed
description BACKGROUND: Trochlear dysplasia is an important pathological factor in patellofemoral instability. Quantitative evaluation of the severity of trochlear dysplasia is rare and remains unclear. MATERIAL/METHODS: Computed tomography (CT) data on 136 knees (95 patients) with trochlear dysplasia in the case group and an age- and sex-matched cohort of 120 knees (70 patients) in the control group were collected for this retrospective study. All participants had undergone CT scans in the supine position. The trochlear angles (TA) formed by the posterior condylar line and the trochlear line were calculated and compared. The threshold for statistical significance was set at p<0.05. RESULTS: The mean TA values were significantly greater in the case group compared to the control group independent of sex (p<0.01). The distribution of trochlear dysplasia of Dejour grades was type A n=34, type B n=31, type C n=40, and type D n=31. Except for types A and B, differences in the trochlear dysplasia grade between any 2 other types were statistically significant (p<0.01). CONCLUSIONS: The technique of measuring TA is reproducible and accurate in patients with patellar instability and normal controls. The TA positively correlates with higher levels of trochlear dysplasia. This technique can help to evaluate and treat trochlear dysplasia in research as well as in clinical practice.
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spelling pubmed-60670152018-07-31 Evaluation of Trochlear Dysplasia Severity Using Trochlear Angle: A Retrospective Study Based on Computed Tomography (CT) Scans Dong, Zhenyue Niu, Yingzhen Duan, Guman Song, Yifan Qi, Jianchao Wang, Fei Med Sci Monit Clinical Research BACKGROUND: Trochlear dysplasia is an important pathological factor in patellofemoral instability. Quantitative evaluation of the severity of trochlear dysplasia is rare and remains unclear. MATERIAL/METHODS: Computed tomography (CT) data on 136 knees (95 patients) with trochlear dysplasia in the case group and an age- and sex-matched cohort of 120 knees (70 patients) in the control group were collected for this retrospective study. All participants had undergone CT scans in the supine position. The trochlear angles (TA) formed by the posterior condylar line and the trochlear line were calculated and compared. The threshold for statistical significance was set at p<0.05. RESULTS: The mean TA values were significantly greater in the case group compared to the control group independent of sex (p<0.01). The distribution of trochlear dysplasia of Dejour grades was type A n=34, type B n=31, type C n=40, and type D n=31. Except for types A and B, differences in the trochlear dysplasia grade between any 2 other types were statistically significant (p<0.01). CONCLUSIONS: The technique of measuring TA is reproducible and accurate in patients with patellar instability and normal controls. The TA positively correlates with higher levels of trochlear dysplasia. This technique can help to evaluate and treat trochlear dysplasia in research as well as in clinical practice. International Scientific Literature, Inc. 2018-07-23 /pmc/articles/PMC6067015/ /pubmed/30036357 http://dx.doi.org/10.12659/MSM.908102 Text en © Med Sci Monit, 2018 This work is licensed under Creative Common Attribution-NonCommercial-NoDerivatives 4.0 International (CC BY-NC-ND 4.0 (https://creativecommons.org/licenses/by-nc-nd/4.0/) )
spellingShingle Clinical Research
Dong, Zhenyue
Niu, Yingzhen
Duan, Guman
Song, Yifan
Qi, Jianchao
Wang, Fei
Evaluation of Trochlear Dysplasia Severity Using Trochlear Angle: A Retrospective Study Based on Computed Tomography (CT) Scans
title Evaluation of Trochlear Dysplasia Severity Using Trochlear Angle: A Retrospective Study Based on Computed Tomography (CT) Scans
title_full Evaluation of Trochlear Dysplasia Severity Using Trochlear Angle: A Retrospective Study Based on Computed Tomography (CT) Scans
title_fullStr Evaluation of Trochlear Dysplasia Severity Using Trochlear Angle: A Retrospective Study Based on Computed Tomography (CT) Scans
title_full_unstemmed Evaluation of Trochlear Dysplasia Severity Using Trochlear Angle: A Retrospective Study Based on Computed Tomography (CT) Scans
title_short Evaluation of Trochlear Dysplasia Severity Using Trochlear Angle: A Retrospective Study Based on Computed Tomography (CT) Scans
title_sort evaluation of trochlear dysplasia severity using trochlear angle: a retrospective study based on computed tomography (ct) scans
topic Clinical Research
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6067015/
https://www.ncbi.nlm.nih.gov/pubmed/30036357
http://dx.doi.org/10.12659/MSM.908102
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