A biomechanical and histological comparison of the suture bridge and conventional double-row techniques of the repair of full-thickness rotator cuff tears in a rabbit model
نویسندگان
چکیده
BACKGROUND The suture bridge (SB) technique and conventional double-row (DR) are both effective in repair of full-thickness rotator cuff tears . However, increasing numbers of scholars believe that the SB technique produces better results than conventional DR because of the higher bone-tendon contact area and pressure. However, The clinical outcomes have been mixed and little direct evidence has been supplied in vivo. This study was designed using the SB and DR techniques to determine which is the better technique. METHODS Sixty-four New Zealand white rabbits were randomly divided into 2 groups, the SB group and DR group. SB and DR were then used to repair their rotator cuff tears. Rabbits were then sacrificed at the 2(nd), 4(th), or 8(th) week after surgery and a histological comparison was made. The biomechanical comparison was made at the 8(th) week. RESULTS The load to failure of the SB group was 134.59 ± 17.69 N at the 8(th) postoperative week, and that was significantly higher than in the DR group (103.83 ± 6.62, P = 0.001), but both repair groups remained lower than in the control group (199.25 ± 14.81). Histological evaluation showed that both the SB and DR groups healed at the bone-tendon interface. But there were subtle differences between the two groups in the structure and morphology of collagen fibers and cartilage cells at bone-tendon interface. In general, the collagen fibers of the SB group were more compact than those of the DR group at all times tested. At the 4(th) and 8(th) weeks, the collagen fibers and cartilage cells in the SB group were arranged in a column modality, but those in the DR group were distributed horizontally. CONCLUSION The SB technique facilitated healing more effectively than the conventional DR technique. The difference in morphology of collagen fibers and cartilage cells may be related to the difference in bone-tendon contact pressure.
منابع مشابه
Arthroscopic Rotator Cuff Repair: A Biomechanical Comparison of Single Row and Suture-Bridge Tendon Repair Constructs
INTRODUCTION: Rotator cuff tears are a very common source of pain and loss of function of the shoulder. As arthroscopic instrumentation and repair techniques have evolved, many studies have demonstrated success in repairing rotator cuff tears using these arthroscopic techniques alone compared with an open repair method. Despite these successful clinical outcomes, both open and arthroscopic rota...
متن کاملPreliminary Results of a Consecutive Series of Large & Massive Rotator Cuff Tears Treated with Arthroscopic Rotator Cuff Repairs Augmented with Extracellular Matrix
Background: Recurrence rate of rotator cuff tears is still high despite the improvements of surgical techniques, materials used and a better knowledge of the healing process of the rotator cuff tendons. Large to massive rotator cuff tears are particularly associated with a high failure rate, especially in elderly. Augmentation of rotator cuff repairs with extracellular matrix or synthetic patc...
متن کاملPosterosuperior rotator cuff tears: classification, pattern recognition, and treatment.
The posterosuperior rotator cuff, composed of the supraspinatus and infraspinatus tendons, is the most common site for full-thickness rotator cuff tears and represents a significant source of shoulder disability worldwide. Recognition of and classification of full-thickness tear patterns are essential in order to optimize surgical treatment and to improve prognosis. Until recently, tear pattern...
متن کاملComparison of the Clinical and Radiological Oucomes of Conventional Double row and Double row Suture Bridge Repairs in Rotator Cuff Tears
This open-access article is published and distributed under the Creative Commons Attribution NonCommercial No Derivatives License (http://creativecommons.org/licenses/by-nc-nd/3.0/), which permits the noncommercial use, distribution, and reproduction of the article in any medium, provided the original author and source are credited. You may not alter, transform, or build upon this article witho...
متن کاملBiomechanical Performance of Medial Row Suture Placement Relative to the Musculotendinous Junction in Transosseous Equivalent Suture Bridge Double-Row Rotator Cuff Repair.
PURPOSE To compare the biomechanical performance of medial row suture placement relative to the musculotendinous junction (MTJ) in a cadaveric transosseous equivalent suture bridge (TOE-SB) double-row (DR) rotator cuff repair (RCR) model. METHODS A TOE-SB DR technique was used to reattach experimentally created supraspinatus tendon tears in 9 pairs of human cadaveric shoulders. The medial row...
متن کامل