Following anterior cruciate ligament reconstruction, grafts relax and warm from the temperature of the operating room to body temperature. The current study compared graft tension and stiffness between patella tendon and hamstring tendon grafts. Six quadruple strand hamstring tendon grafts and six patella tendon grafts were preconditioned and loaded to 105 N while at 20 degrees C. Graft tension and stiffness were measured after 15 min, after an additional 4 h, and after increasing the temperature to 34 degrees C. A two-way repeated-measures analysis of variance and a post hoc test were used to compare the measurements between the two types of graft and identify significant (p < 0.05) changes for each type of graft. Tension was significantly larger for the patella tendon grafts, although the stiffness values were not significantly different (p > 0.8). For both types of graft, tension and stiffness decreased significantly with time and the temperature increase. The lowest tension and stiffness measurements were 50 +/- 11 N and 129 +/- 35 N/mm, respectively, for the patella tendon grafts, compared to 18 +/- 5 N and 115 +/- 11 N/mm, respectively, for the hamstring tendon grafts. Both types of graft lose tension to relaxation and a temperature increase, but the tension loss is larger for hamstring tendon grafts.

Download full-text PDF

Source
http://dx.doi.org/10.1002/jor.20677DOI Listing

Publication Analysis

Top Keywords

tendon grafts
32
tension stiffness
20
hamstring tendon
20
patella tendon
20
graft tension
16
types graft
12
tendon
10
grafts
9
tension
8
temperature increase
8

Similar Publications

Anterior cruciate ligament (ACL) injuries are common in sports and often require surgical intervention, e.g., ACL reconstruction (ACLR), aimed at restoring knee stability and enabling a return to pre-injury activity levels.

View Article and Find Full Text PDF

Minimizing Unnecessary Harvesting of an Extremely Thin Gracilis Tendon During ACL Reconstruction by Referencing the Diameter of the Doubled Semitendinosus Tendon Alone.

Orthop J Sports Med

January 2025

Department of Orthopaedics & Traumatology, School of Clinical Medicine, Li Ka Shing Faculty of Medicine, The University of Hong Kong, Hong Kong SAR.

Background: The incidence of anterior cruciate ligament reconstruction (ACLR) graft failure is inversely related to the diameter of the ACLR graft. When the diameter of a 4-stranded hamstring tendon graft with a doubled semitendinosus and doubled gracilis tendon (ST×2 + G×2) configuration is <8 mm, the gracilis tendon is often thin.

Hypothesis: (1) The diameter of the doubled semitendinosus tendon (ST×2) alone would be able to predict the probability of a 4-stranded ACLR graft having a diameter of ≥8 mm, and (2) there would be a specific cutoff value for the ST×2 diameter such that the addition of a doubled gracilis tendon (G×2) will not result in a 4-stranded graft with a ≥8-mm diameter.

View Article and Find Full Text PDF

Background: The use of quadriceps tendon (QT) autograft for anterior cruciate ligament (ACL) reconstruction has been increasing since 2014. Studies have shown that QT is comparable to hamstring tendon (HT) and bone-patellar tendon-bone (BTB) autografts in terms of outcomes, although QT autograft has lower rates of donor site morbidity. Systematic reviews and meta-analyses have been previously conducted on this topic, although none have focused solely on data of patients at least 5 years out from surgery.

View Article and Find Full Text PDF

Introduction: therapeutic equivalence has been established in the effectiveness of peripheral nerve blocks in the management of pain in the postoperative period of anterior cruciate ligament reconstruction. However, it is unknown whether this effect is modulated by the anesthesiologist's experience. The objective was to describe the effectiveness of peripheral nerve blocks during the first 24 hours of the postoperative period, considering patient characteristics and the anesthesiologist's experience.

View Article and Find Full Text PDF

Background: The Latarjet procedure is considered the gold standard for treating patients with anterior shoulder instability in the presence of critical glenoid bone loss. Proponents of the Latarjet contend that its efficacy is in-part attributable to the "sling effect" of the conjoint tendon; however, recent studies have demonstrated similar restoration of anterior stability in patients undergoing free bone block (FBB) procedures. The purpose of this systematic review was to evaluate the biomechanical and clinical evidence for the sling effect.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!