TY - JOUR
T1 - Biomechanical effect of rotator cuff augmentation with an acellular dermal matrix graft
T2 - A cadaver study
AU - Omae, Hiromichi
AU - Steinmann, Scott P.
AU - Zhao, Chunfeng
AU - Zobitz, Mark E.
AU - Wongtriratanachai, Prasit
AU - Sperling, John W.
AU - An, Kai Nan
N1 - Funding Information:
This study was supported by funding from Wright Medical Technology (Arlington, TN, USA). Wright Medical had no involvement in the study design, specimen collection, analysis or interpretation of the data, the writing of the manuscript, or the decision to submit the manuscript for publication.
PY - 2012/10
Y1 - 2012/10
N2 - Background: Acellular human dermal matrix grafts (Graftjacket; Wright Medical Technology, Arlington, TN, USA) are used clinically for rotator cuff augmentation without a detailed understanding of their biomechanical effects. The purpose of this study was to evaluate the effect of augmentation with dermal grafts on the biomechanical effects of rotator cuff repairs. Methods: Nine matched pairs of human cadaveric shoulders were used. A single-row rotator cuff repair combined with an augmentation graft was performed on one shoulder, and a single-row repair was performed on the contralateral shoulder as a control. An acellular dermal matrix graft was sutured to the tendon medially and fixed to the humerus laterally. The constructs were preloaded at 10 N and then cyclically loaded between 10 and 180 N for 1000 cycles, followed by tensile testing to failure at 1.0 mm/s. Findings: The maximum load of the augmentation group (560.2 N, SD 95.5) was greater than that of the control group (345.7 N, SD 60.8), while the linear stiffness of the augmentation group (65.2 N/mm, SD 15.6) was less than that of the control group (77.2 N/mm, SD 15.7). Reliable gap distance data were not obtained during cyclic loading in 5 of 9 augmented repairs due to the elasticity of the dermal matrix graft. Interpretation: The dermal matrix graft augmentation increased the maximum load but did not increase the linear stiffness. The elasticity of the dermal matrix graft affected the biomechanical effects of the augmented rotator cuff repairs.
AB - Background: Acellular human dermal matrix grafts (Graftjacket; Wright Medical Technology, Arlington, TN, USA) are used clinically for rotator cuff augmentation without a detailed understanding of their biomechanical effects. The purpose of this study was to evaluate the effect of augmentation with dermal grafts on the biomechanical effects of rotator cuff repairs. Methods: Nine matched pairs of human cadaveric shoulders were used. A single-row rotator cuff repair combined with an augmentation graft was performed on one shoulder, and a single-row repair was performed on the contralateral shoulder as a control. An acellular dermal matrix graft was sutured to the tendon medially and fixed to the humerus laterally. The constructs were preloaded at 10 N and then cyclically loaded between 10 and 180 N for 1000 cycles, followed by tensile testing to failure at 1.0 mm/s. Findings: The maximum load of the augmentation group (560.2 N, SD 95.5) was greater than that of the control group (345.7 N, SD 60.8), while the linear stiffness of the augmentation group (65.2 N/mm, SD 15.6) was less than that of the control group (77.2 N/mm, SD 15.7). Reliable gap distance data were not obtained during cyclic loading in 5 of 9 augmented repairs due to the elasticity of the dermal matrix graft. Interpretation: The dermal matrix graft augmentation increased the maximum load but did not increase the linear stiffness. The elasticity of the dermal matrix graft affected the biomechanical effects of the augmented rotator cuff repairs.
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U2 - 10.1016/j.clinbiomech.2012.05.001
DO - 10.1016/j.clinbiomech.2012.05.001
M3 - Article
C2 - 22607908
AN - SCOPUS:84865148167
SN - 0268-0033
VL - 27
SP - 789
EP - 792
JO - Clinical Biomechanics
JF - Clinical Biomechanics
IS - 8
ER -