CC BY-NC-ND 4.0 · Revista Chilena de Ortopedia y Traumatología 2021; 62(01): 019-026
DOI: 10.1055/s-0041-1728736
Original Article | Artículo Original

Pressure on the Rotator Cuff Repair with Transosseous and Modified Mason-Allen Sutures

Article in several languages: español | English
Julio José Contreras Fernández
1  Instituto Traumatológico, Santiago, Región Metropolitana, Chile
,
Oscar Sepúlveda Osses
2  Hospital del Trabajador, Santiago, Región Metropolitana, Chile
,
Nicolás Prado Esper
2  Hospital del Trabajador, Santiago, Región Metropolitana, Chile
,
Ricardo Guzmán Silva
1  Instituto Traumatológico, Santiago, Región Metropolitana, Chile
,
Rodrigo Liendo Verdugo
3  Pontificia Universidad Católica de Chile, Santiago, Región Metropolitana, Chile
,
Francisco Soza Rex
3  Pontificia Universidad Católica de Chile, Santiago, Región Metropolitana, Chile
› Author Affiliations

Abstract

Objective To compare the average contact pressure curve and the percentage of final residual contact pressure at the tendon-footprint interphase of a transosseous (TO) repair performed with crossover suture or a modified Mason-Allen (MMA) configuration.

Methods Eight lamb shoulders were used to simulate a rotator cuff tear. The pressure was measured with a digital sensor. The baseline pressure was recorded during the application of the cyclic load and at the end of the intervention. Two repairs were compared: 2 crossover TO sutures (CTOs) (n = 4) and 2 MMA sutures MMA (n = 4), using MaxBraid #2 (Zimmer Biomet, Warsaw, IN, US) sutures. A thousand cycles were performed, with a frequency of 2 Hz and a 30-N load. The Student t-test was used, and significance was set at p < 0.05.

Results The average contact pressure curve was of 86.01 ±  8.43% for parts repaired with CTO sutures, and of 73.28 ±  12.01% for those repaired with MMA sutures (p < 0.0004). The mean residual percentage at the end of cycling was of 71.57% for CTO sutures, and of 51.19% for MMA sutures (p < 0.05).

Conclusion The CTO repair shows a higher average contact pressure curve and a higher percentage of final residual contact pressure at the tendon-footprint interphase than the MMA suture repair after standardized cyclic loading, potentially resulting in improved tendon healing.

Level of Evidence Basic Science Study.



Publication History

Received: 28 June 2020

Accepted: 21 January 2021

Publication Date:
02 June 2021 (online)

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