Chinese Journal of Tissue Engineering Research ›› 2011, Vol. 15 ›› Issue (39): 7238-7241.doi: 10.3969/j.issn.1673-8225.2011.39.005

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Q angle measurement for surgical treatment of patella dislocation based on knee soft tissue balance

Gui Bin-jie, Liu De-bao, Lu Xiao-lin, Zhou Jian   

  1. Department of Orthopedics, First Affiliated Hospital of Anhui Medical University, Hefei  230033, Anhui Province, China
  • Received:2011-06-30 Revised:2011-08-01 Online:2011-09-24 Published:2011-09-24
  • About author:Gui Bin-jie☆, Doctor, Associate chief physician, Department of Orthopedics, First Affiliated Hospital of Anhui Medical University, Hefei 230033, Anhui Province, China

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Abstract:

BACKGROUND: Surgical treatment of habitual dislocation of the patella can improve the Q angle to correct dislocation of the patella through the lateral patellar soft tissue balance.
OBJECTIVE: To evaluate the clinical effects of surgical treatment of the habitual dislocation of the patella based on knee soft tissue balance by Q angle measurement.
METHODS: Q angles in 18 cases of habitual dislocation of the patella before surgery were measured, according to which, 18 cases were divided into two groups: <16° group, treated by the knee joint capsule lateral release, medial joint capsule tightening; >16° group, treated by the knee joint capsule lateral release, medial joint capsule tightening, tibial tubercle transposition and/or the lateral and medial part of quadriceps displacement.
RESULTS AND CONCLUSION: Postoperative Q angle was significantly improved in the two groups as compared with that before operation as well as the score of Lysholm-Gillquist (P < 0.001). There was no significant difference between the two groups (P  > 0.05). Results of Q angle measurement show that based on on knee soft tissue balance, these surgery treatments for of patella dislocation have fewer complications and benefits to the functional recovery of the knee joint.

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