The Official journal of the China Association of Rehabilitation of Disabled Persons and the 88^th Hospital of PLA

Composite Impact Factor:

0. 948 (2015)

Total citation frequency: 3868 (2015)

ISSN 1005-8478

CN 37-1247/R

Abstract: [Objective] To evaluate the impact of total removal of lateral discoid meniscus on lateral patellar displacement.[Methods] From January 2004 to March 2009, a total of 96 patients with lateral discoid meniscus was enrolled into this study,including 44 men and 52 women with a mean age of (25.03¡À9.45) years ranging from 14 to 38 years, involving 50 left knees and 46 right knees. Total meniscectomy was performed in 96 knees (96 patients) for treatment of discoid lateral meniscus. The loaded X-rays and computerized topographies were taken from every patient to measure the width of the lateral tibiofemoral space,tibiofemoral angle, lateral displacement of the patella and distance between the tibial tuberosity and the trochlear groove (TTTG). [Results] All patients were followed up for a mean of (12.56¡À2.31) years. The width of the lateral tibiofemoral space significantly decreased from (5.95 ¡À 1.50) mm preoperatively to (3.95¡À0.85) mm at the latest follow up, with a statistical significance (P<0.05) . In addition, the lateral displacement of the patella measured on CT images significantly increased from £¨0.15¡À0.10£© mm before operation to (3.25¡À0.60) mm at the latest follow- up, which proved statistically significant (P<0.05) . Furthermore, the tibiofemoral angle, significantly decreased from (176.56¡À2.54)¡ã preoperatively to (167.52¡À2.72)¡ã at the latest follow up, with a statistical significance (P<0.05) .Moreover, the TT-TG value significantly increased from (11.60¡À2.85) mm preoperatively to (20.35 ¡À2.25) mm at the latest follow up, which was statistically significant (P<0.05) . [Conclusion] Total removal of complete lateral discoid meniscus might induce lateral displacement of the patella, and lead to patellofemoral arthritis at the later stage.