Bankart lesion repair: biomechanical and anatomical analysis of Mason-Allen and simple sutures in a swine model

Abstract

ObjectiveTo evaluate the labral height and pullout resistance after the repair of Bankart lesions in the glenohumeral joint of swine models, using double-loaded anchors with two suture configurations: simple and Mason-Allen.MethodsTen swine shoulders were used, in which Bankart lesions were created. For each specimen, the lesion was sutured randomly with Mason-Allen sutures or simple sutures. The labral height was measured before the lesion was created and after the labral repair. The specimens were submitted to a tensile test for biomechanical evaluation.ResultsIn specimens submitted to simple suture (n = 5), the mean labral height observed before the lesion was 3.86 mm, and after suturing, 3.33 mm. In specimens submitted to Mason-Allen suture (n = 5), it was observed that the mean labral height before the lesion was 3.92 mm, and after suturing, 3.48 mm. When comparing the labral height after simple suture and Mason-Allen suture, no significant difference was observed. The pullout force at the end of the tensile test on specimens with single suture was 130 N, and in specimens with Mason-Allen suture, 128.6 N. No statistically significant differences were observed between the shoulders treated with single suture and Mason-Allen suture; p = 0.885.ConclusionsRepair of Bankart lesions with Mason-Allen suture provides increased labrum height; however, it does not increase the pullout strength.

Functional Results of Modified Mason-Allen Suture versus Horizontal Mattress Suture in the Arthroscopic Broström-Gould Procedure for Chronic Ankle Instability

“…In open rotator cuff repair, the modi ed Mason-Allen suture showed better pull-out strength than simple suture and horizontal mattress suture [15]. In addition, Santos et al [13] studied the biomechanics of simple suture and modi ed Mason-Allen suture in the Bankart lesions swine model, and found that the modi ed Mason-Allen suture provides increased labrum height, and meanwhile, the modi ed Mason-Allen suture had the same biomechanical strength advantage as simple suture. Siripipattanamongkol et al [14] retrospectively analyzed 80 patients with Bankart lesions, followed up for at least 2 years, and conducted a comparative study on the e cacy of modi ed Mason-Allen suture and simple suture in the treatment of shoulder glenolip lesions.…”

“…Modi ed Mason-Allen suture was originally used for hand surgery tendon suture, but now it is mainly used for rotator cuff tear, labrum of shoulder joint, meniscus posterior root and achilles tendon repair. Its characteristics are mainly characterized by "straddle" locking, strong tissue holding force and pull force, small suture cutting force and relatively simple execution [13][14][15]. Now, no clinical studies have reported functional outcomes of modi ed Mason-Allen suture therapy for CAI in ABG.…”

Microfracture in Linear, Isolated, Narrow, Engaging Hill-Sachs Lesion

“…Overall, 4 anchors are applied ( Fig 3 F), and the most superior anchor is tied with a modified Mason-Allen technique for reinforcement. 8 …”

“…Knots are tied arthroscopically using the SMC knot technique, with care taken to keep the knots away from the glenoid face (Fig 3E). Overall, 4 anchors are applied (Fig 3F), and the most superior anchor is tied with a modified Mason-Allen technique for reinforcement 8 …”

Arthroscopic Bankart repair: A matched cohort comparison of the modified Mason Allen method and the simple stitch method

“… 13 Recently, the modified Mason Allen stitch has come into favor and has been theorized to be superior to the simple stitch technique. 9 , 14 , 15 The concept of combining capsular shift and arthroscopic Bankart repair (ABR) with the modified Mason Allen stitch technique has been challenged. 16 However, clinical studies are still sparse.…”