Does severity or specific joint laxity influence clinical outcomes of anterior cruciate ligament reconstruction?
It generally is believed generalized joint laxity is one of the risk factors for failure of anterior cruciate ligament (ACL) reconstruction. However, no consensus exists regarding whether adverse effects on ACL reconstruction are attributable to joint-specific laxity or are related to the severity of generalized joint laxity. We therefore asked whether knee stability and functional outcomes would be related to joint-specific laxity and would differ according to the severity of generalized joint laxity. The Beighton and Horan criteria were used to assess joint laxity in 272 subjects. All elements are added to give an overall joint laxity score ranging from 0 to 5. Knee translation did not increase in proportion to the severity of the generalized joint laxity. Patients with scores less than 4 showed similar knee stability. When all variables, including the severity of generalized joint laxity, were considered, only hyperextension of the knee independently predicted knee stability and function. In patients with knee hyperextension, a bone-patellar tendon-bone autograft provided superior stability and function compared with a hamstring tendon autograft. Our data suggest knee hyperextension predicts postoperative stability and function regardless whether patients have severe generalized joint laxity.


METHODS
Level III, prognostic study. See Guidelines for Authors for a complete description of levels of evidence.
Kim
Sung-Jae
SJ
Department of Orthopaedic Surgery, Yonsei University College of Medicine, Arthroscopy & Joint Research Institute, CPO Box 8044, 134, Shinchon-Dong, Seodaemun-Ku, 120-752, Seoul, Korea.
Moon
Hong-Kyo
HK
Kim
Sul-Gee
SG
Chun
Yong-Min
YM
Oh
Kyung-Soo
KS
D000293:Adolescent; D000328:Adult; D016118:Anterior Cruciate Ligament / Q000503:physiopathology / Q000601:surgery*; D000070598:Anterior Cruciate Ligament Injuries; D016025:Bone Transplantation / Q000379:methods; D005260:Female; D006801:Humans; D015601:Injury Severity Score; D007593:Joint Instability / Q000503:physiopathology / Q000601:surgery*; D007718:Knee Injuries / Q000503:physiopathology / Q000601:surgery*; D007719:Knee Joint / Q000503:physiopathology / Q000601:surgery*; D008297:Male; D008875:Middle Aged; D017847:Patellar Ligament / Q000637:transplantation; D011183:Postoperative Complications; D011379:Prognosis; D016059:Range of Motion, Articular / Q000502:physiology; D019651:Plastic Surgery Procedures; D012189:Retrospective Studies; D012307:Risk Factors; D016896:Treatment Outcome; D055815:Young Adult