A Comparison Study Of Tranosseous Suture Bridge Technique And Modified Mason-Allen Technique Repair The Rotator Cuff Tears In Rabbit

BACKGROUND:The modified Mason-Alien technique is commonly used for repairing rotator cuff tears,while the suture bridge technique is seldomly reported in small animal modelsOBJECTIVE:To explore a new method for repairing rotator cuff injuryMETHODS:48 New male Zealand white rabbits were used to make rotator cuff injury models and randomly divided into two groups:the modified Mason-Allen technique was used in the control group,and the tranosseous suture bridge technique was used in the experimental group.16 animals were sacrificed at 4,8,and 12 weeks respectively,and the proximal humerus specimens were used for specimen observation,histological examination,and modified maturity of tendon-bone healing scoreRESULTS AND CONCLUSION:Specimens observation:2 cases of fixation failure in the control group.Histology examination:At the 12 weeks after operation,the tendon-bone interface of suture bridge technique group were tending to normal columnar structure,which the regeneration fibrocartilage and the collagen fibers were orderly and compact.In the modified Mason-Allen technique group,there were fewer disordered fibrocartilage,and the tendon-bone interface was healing with scar.At weeks of 4,8 and 12,the scores of tendon-bone healing of the experimental group were significantly better than the control group(P<0.01).Conclusion Compared with modified Mason-Allen technique,the transosseous suture bridge technique improved the rotator cuff tendon-bone healing rate,and the fixation failure rate was lower.