Clinical comparison between six-strand hamstring tendon and patellar tendon autograft in arthroscopic anterior cruciate ligament reconstruction: a prospective, randomized clinical trial

J Med Assoc Thai. 2009 Apr;92(4):491-7.


Objective: Many randomized clinical trials demonstrated that 4-strand hamstring tendon grafts have comparable results both subjectively and objectively with the patellar tendon grafts. The authors hypothesized that the increment of hamstring tendons strength with 6-strand graft could improve the knee stability compared to the result from using the gold standard patellar tendon.

Material and method: Thirty-four patients were prospectively randomized into two groups for arthroscopic anterior cruciate ligament reconstruction. Seventeen patients underwent reconstruction with 6-strand hamstring tendons and the remaining seventeen were treated with bone-patellar tendon-bone graft. Patients were followed-up under the similar rehabilitation protocol for at least 12 months. At the time of final follow-up, all the patients in both groups were evaluated in terms of patient's satisfaction, activity level, and knee stability.

Results: Fifteen patients in bone-patellar tendon-bone graft (two lost to follow-up) and thirteen patients used 6-strand hamstring tendons (four were converted to 4-strand hamstring tendons) were evaluated at a mean of 19 months (range 12-31 months). The mean of KT-2000 side-to-side laxity measurement in 6-strand hamstring group (0.96 mm) is less than BPTB group (1.22 mm) significantly (p < 0.05). Eleven of 13 patients (84.62%) that received the 6-strand hamstring tendons could return to sport activities compared to 10 of 15 patients (66.67%) that received BPTB graft. Hamstring group have a lower prevalence of donor-site morbidity resulting in less difficult in kneeling.

Conclusion: The authors concluded that using 6-strand hamstring tendons could improve knee stability in the early clinical outcomes. With no difference in subjective assessment, anterior cruciate ligament reconstruction used hamstring tendons have less donor-site morbidity, which is more compatible to Asian life-style.

Publication types

  • Randomized Controlled Trial

MeSH terms

  • Adolescent
  • Adult
  • Anterior Cruciate Ligament / surgery*
  • Arthroscopy
  • Bone-Patellar Tendon-Bone Grafting*
  • Female
  • Follow-Up Studies
  • Humans
  • Joint Instability / surgery*
  • Knee Injuries / surgery*
  • Male
  • Middle Aged
  • Patient Satisfaction
  • Prospective Studies
  • Reconstructive Surgical Procedures
  • Recovery of Function / physiology*
  • Tendons / physiopathology*
  • Tendons / transplantation*
  • Transplantation, Autologous
  • Treatment Outcome
  • Young Adult