Pullout strength of all suture anchors in the repair of rotator cuff tears: a biomechanical study.
Int Orthop
; 37(10): 2017-23, 2013 Oct.
Article
en En
| MEDLINE
| ID: mdl-23835556
ABSTRACT
PURPOSE:
We evaluated the biomechanical strength of two all suture anchors (ASA) of reduced diameter (1.4 mm) and compared them with the standard screw anchor (SA) with larger diameter (5.5 mm) used in rotator cuff tears.METHODS:
We conducted 30 uniaxial vertical pullout tests using Material Testing System Instron 5566A until failure of the anchorage defined as rupture of the threads or anchor or detachment of the anchor. Anchor fixation was on tuberosities of fresh bovine humerus bone. ASAs were spaced four millimetres apart and were compared with a control SA implanted on the same greater tubercle at two centimetres. The tests were all performed at room temperature in a dry environment. Tensile loads (10 mm/min) were applied parallel to the axis of insertion. A preloading of 10 N was used to overcome loading artifacts of the test sample at the beginning of the test.RESULTS:
Student's t test showed no statistically significant difference between anchors in terms of load to failure (ASA force 265.06 ± 87.25 N versus SA 325.35 ± 113.46 N; p = 0.09) and mean elongation at rupture (ASA 23 ± 7 mm versus SA 21 ± 6 mm; p = 0.46).CONCLUSIONS:
In vitro, this experimental study showed no statistically significant difference in pullout strength and displacement between ASA and SA at a chosen level of significance (p < 0.05).
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Resistencia a la Tracción
/
Ensayo de Materiales
/
Manguito de los Rotadores
/
Anclas para Sutura
/
Lesiones del Manguito de los Rotadores
Tipo de estudio:
Evaluation_studies
Límite:
Animals
Idioma:
En
Revista:
Int Orthop
Año:
2013
Tipo del documento:
Article