Femoropatellar radiographic alterations in cases of anterior cruciate ligament failure

Revista Brasileira de Ortopedia

Diego Protásio De Vasconcelos¹  Alan De Paula Mozella¹  Pedro Guilme Teixeira De Sousa Filho¹  Gustavo Cardilo Oliveira¹  Hugo Alexandre De Araújo Barros Cobra¹ 

关键词: Joint instability;    Anterior cruciate ligament;    Patellofemoral joint;    Instabilidade articular;    Ligamento cruzado anterior;    Articulação patelofemoral;   

DOI  :  10.1016/j.rboe.2015.01.005

来源: SciELO

【 摘 要 】

OBJECTIVE: To make a comparative analysis on three femoropatellar radiographic parameters, between knees with chronic failure of the anterior cruciate ligament (ACL) and normal knees.METHODS: Thirty volunteer patients with a diagnosis of unilateral isolated chronic ACL injury for more than one year and a normal contralateral knee were selected. Digital radiographs were produced for all the patients, on both knees in absolute lateral view at 30° of flexion, with and without load-bearing on one leg, and in axial view of the patella at 30°. The Caton-Deschamps patellar height index, Merchant patellar congruence angle and Laurin lateral patellar tilt angle were measured on the radiographs obtained from the normal knees and knees with ACL injuries, and comparative analysis was performed between these two groups.RESULTS: The patellar height was statistically significantly lower (p< 0.001) in the knees with ACL failure than in the normal knees, both on radiographs without loading and on those with single-foot loading. The Merchant patellar congruence angle was significantly smaller (p < 0.001) in the normal knees and the lateral patellar tilt angle was smaller (p < 0.001) in the knees with ACL failure.CONCLUSION: Chronic ACL failure gave rise to a statistically significant change in the femoropatellar radiographic values studied (p < 0.001). Knees with injuries to this ligament presented lower patellar height values, greater tilt and lateral displacement of the patella, in relation to the femoral trochlea, in comparison with the normal contralateral knees.

【 授权许可】

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