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Updated: Feb 3, 2026

Harvesting of Peroneus Longus Tendon Autograft
Published on: September 2, 2025
Contrast-Enhanced MRI Evaluation of Bone-Patellar Tendon-Bone and Hamstring ACL Autograft Healing in Humans: A
Dana Curtis Covey1, Korina Erin Sandoval1, Robert H Riffenburgh2,3
1Department of Orthopaedic Surgery, University of California San Diego, San Diego, California, USA.
This study found no significant difference in revascularization between bone-patellar tendon-bone (BPTB) and semitendinosus and gracilis (STG) autografts after anterior cruciate ligament (ACL) reconstruction. Both graft types show increased vascularization between 6-9 months post-surgery.
Area of Science:
- Orthopedic surgery
- Sports medicine
- Radiology
Background:
- Gadolinium-enhanced MRI assesses graft healing after anterior cruciate ligament (ACL) reconstruction.
- Bone-patellar tendon-bone (BPTB) and semitendinosus and gracilis (STG) tendon autografts are common for ACL repair.
Purpose of the Study:
- To compare the revascularization patterns and timing of BPTB versus STG autografts after ACL reconstruction using gadolinium-enhanced MRI.
Main Methods:
- A randomized controlled trial involving 73 patients undergoing ACL reconstruction with either BPTB or STG autografts.
- Gadolinium-enhanced MRI scans were performed at 3-month intervals for one year post-surgery.
- Graft enhancement was assessed to evaluate revascularization, timing, and pattern.
Main Results:
- No statistically significant differences in gadolinium-enhanced MRI signal enhancement were observed between BPTB and STG autografts.
- Graft enhancement, indicating revascularization, varied in intensity and location over time.
Conclusions:
- Autograft revascularization after ACL reconstruction is a dynamic process.
- Increased contrast uptake between 6-9 months postoperatively suggests neovascularization and ligamentization.
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