Abstract:

BACKGROUND: Pervious studies have showed stress can promote tendon-bone repair, but studies related to ultrasonic testing during tendon-bone repair are few.
OBJECTIVE: To study the changes in ultrasonic testing of tendon-bone in rabbits with postreconstructive acute ruptured rotator cuff under stress.
METHODS: Adult male New Zealand white rabbits were selected for establishing animal models of tendon-bone repair with postreconstructive acute ruptured rotator cuff under stress, and then were randomly divided into two groups: stress group and non-stress group. Rabbits in the stress group were trained at 2 weeks after operation. Non-stress group was with caging and free.
RESULTS AND CONCLUSION: At 2 weeks after operation, the echoes at the site of the rabbit supraspinatus tendon-bone were still discontinuous and the signals of inflammatory exudation appeared more evidently than before in the two groups. At 4 weeks after operation, the linear continuous echoes appeared at the site of the rabbit supraspinatus tendon-bone in two groups, which showed more obvious in the stress group than that in the non-stress group. At 6 weeks after operation, the echoes at the site of the rabbit supraspinatus tendon-bone were still discontinuous in two groups, the areas of discontinuous echoes in stress group tendon significantly reduced. At 8 weeks after operation, the echoes at the site of the rabbit supraspinatus tendon-bone were still discontinuous in two groups, the areas of echoes of the tissues combined tendon and bone is more spacious than before. A certain degree of stress stimulation plays an active role in the repairing of postoperative actue ruptured rabbit rotator cuff tendon-bone and ultrasonic testing can detect the dynamic role of tendon-bone repair with non-invasive and accurate.