To investigate the risk factors for progression of articular
cartilage damage after anatomical anterior cruciate ligament (ACL)
reconstruction. A total of 174 patients who underwent second-look arthroscopic
evaluation after anatomical ACL reconstruction were enrolled in
this study. The graded condition of the articular cartilage at the
time of ACL reconstruction was compared with that at second-look
arthroscopy. Age, gender, body mass index (BMI), ACL reconstruction
technique, meniscal conditions, and other variables were assessed
by regression analysis as risk factors for progression of damage
to the articular cartilage.Aims
Patients and Methods
We report the clinical outcome and findings at
second-look arthroscopy of 216 patients (mean age 25 years (11 to 58))
who underwent anterior cruciate ligament (ACL) reconstruction or
augmentation. There were 73 single-bundle ACL augmentations (44
female, 29 male), 82 double-bundle ACL reconstructions (35 female,
47 male), and 61 single-bundle ACL reconstructions (34 female, 27
male). In 94 of the 216 patients, proprioceptive function of the knee
was evaluated before and 12 months after surgery using the threshold
to detect passive motion test. Second-look arthroscopy showed significantly better synovial
coverage of the graft in the augmentation group (good: 60 (82%),
fair: 10 (14%), poor: 3 (4%)) than in the other groups (p = 0.039).
The mean side-to-side difference measured with a KT-2000 arthrometer
was 0.4 mm (-3.3 to 2.9) in the augmentation group, 0.9 mm (-3.2
to 3.5) in the double-bundle group, and 1.3 mm (-2.7 to 3.9) in
the single-bundle group: the result differed significantly between
the augmentation and single-bundle groups (p = 0 .013). No significant
difference in the Lysholm score or pivot-shift test was seen between
the three groups (p = 0.09 and 0.65, respectively). In patients
with good synovial coverage, three of the four measurements used
revealed significant improvement in proprioceptive function (p = 0.177,
0.020, 0.034, and 0.026). We conclude that ACL augmentation is a reasonable treatment option
for patients with favourable ACL remnants. Cite this article:
We evaluated the mechanical strength of two cortical suspension devices by reproducing clinical situation for ACL reconstruction. A most important factor affecting the displacement during cyclic load was the length of the tendon rather than the length of the device. A definite consensus for the optimal graft fixation technique to the femur in an anterior cruciate ligament (ACL) reconstruction has not been reached, although there have been several fixation techniques such as cortical suspension devices, transfixation devices, and interference screws. The purpose of this study was to evaluate the mechanical strength of two cortical suspension devices by reproducing actual clinical situation for ACL reconstruction in order to compare the TightRopeTM as a new adjustable-length loop device and the EndoButtonTM as a well-known fixed-length loop device under the consistent conditions.Summary Statement
Introduction
