Hamstring muscle function after tendon harvest for anterior cruciate ligament reconstruction: evaluation with T2 relaxation time of magnetic resonance imaging
| Autor: | Takeshi Higashida, Akira Minato, Yoshitsugu Takeda, Shinji Kashiwaguchi, Tetsuya Matsuura |
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| Rok vydání: | 2005 |
| Předmět: |
musculoskeletal diseases
Adult Male Anterior cruciate ligament reconstruction Adolescent Knee Joint medicine.medical_treatment Anterior cruciate ligament Tendon Transfer Physical Therapy Sports Therapy and Rehabilitation Knee Injuries Arthroplasty Tendons 03 medical and health sciences 0302 clinical medicine Tendon transfer medicine Humans Regeneration Orthopedics and Sports Medicine Anterior Cruciate Ligament Range of Motion Articular Muscle Skeletal 030222 orthopedics medicine.diagnostic_test business.industry Magnetic resonance imaging Muscle belly 030229 sport sciences Anatomy musculoskeletal system Magnetic Resonance Imaging Tendon Exercise Therapy medicine.anatomical_structure Treatment Outcome Female Range of motion business Hamstring |
| Zdroj: | The American journal of sports medicine. 34(2) |
| ISSN: | 0363-5465 |
| Popis: | Background Regeneration of the semitendinosus and gracilis tendons after harvesting for anterior cruciate ligament reconstruction has been reported; however, muscle belly function after tendon regeneration has not been well documented. Hypothesis The semitendinosus and gracilis muscles are highly activated during knee flexion if their tendons are well regenerated after anterior cruciate ligament reconstruction. Study Design Descriptive laboratory study. Methods Hamstring muscle activation in 11 patients who had undergone anterior cruciate ligament reconstruction with semitendinosus and gracilis tendons was evaluated by measuring the increase of T2 relaxation time measured via magnetic resonance imaging after knee flexion exercise. Tendon regeneration was evaluated via magnetic resonance imaging. Results Both muscles increased T2 relaxation time after knee flexion exercise in the operated legs, and there was no significant difference in those values between the operated and nonoperated legs. All the semitendinosus tendons were regenerated at or below the joint line, but no gracilis tendons were observed beyond the joint line. The results indicated that both muscles were highly recruited during knee flexion, regardless of the degree of their tendon regeneration. Conclusion The semitendinosus and gracilis muscles are able to restore or maintain their contractile capability after harvest of their tendons for anterior cruciate ligament reconstruction, regardless of the degree of regeneration. |
| Databáze: | OpenAIRE |
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