Effect of suprascapular nerve injury on rotator cuff enthesis
| Autor: | Beril Okur, Yon-Sik Yoo, Baris Kocaoglu, Arel Gereli, Tekin Kerem Ulku, Serap Uslu |
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| Rok vydání: | 2020 |
| Předmět: |
Male
medicine.medical_specialty Rotator Cuff Injuries Rotator Cuff 03 medical and health sciences 0302 clinical medicine Atrophy Peripheral Nerve Injuries medicine Animals Orthopedics and Sports Medicine Rotator cuff Rats Wistar 030222 orthopedics business.industry Fibrocartilage 030229 sport sciences General Medicine Anatomy Nerve injury Suprascapular nerve musculoskeletal system Enthesis medicine.disease Rats Tendon Disease Models Animal medicine.anatomical_structure Orthopedic surgery Tears Surgery Collagen medicine.symptom business |
| Zdroj: | Journal of Shoulder and Elbow Surgery. 29:1584-1589 |
| ISSN: | 1058-2746 |
| DOI: | 10.1016/j.jse.2019.12.028 |
| Popis: | Numerous reports have shown that retracted rotator cuff tears may cause suprascapular nerve injury, and nerve injury causes atrophy and fat accumulation in the rotator cuff muscles. However, the effect of suprascapular nerve injury on rotator cuff enthesis has not been directly defined. This study aimed to investigate the effect of suprascapular nerve injury on rotator cuff enthesis.Twenty-four Wistar albino rats underwent bilateral transection of the suprascapular nerve. Additional 6 rats were used as the sham group. Bilateral supraspinatus and infraspinatus entheses were examined after 1, 4, 8, and 12 weeks of nerve transection. Histomorphometric analyses were performed for each zone of enthesis.Compared with normal enthesis, significant and consistent decrease in cellularity were observed in the tendon and bone at all time points (P.001). Collagen bundle diameter in the tendon also decreased in a similar manner (P.001). Apart from the tendon and bone zones, fibrocartilage and calcified fibrocartilage zones showed similar response, and significant decrease in cellularity was observed 8 weeks after nerve transection (P.001).This study identifies suprascapular nerve injury as an underlying mechanism leading to compromise of the rotator cuff enthesis structure. Suprascapular nerve injury may be considered as an etiologic factor for the impaired healing after repair of a massive tear. |
| Databáze: | OpenAIRE |
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