Suture Strength and Angle of Load Application in a Suture Anchor Eyelet

Rotator cuff tears: pathology and repair

“…2 Fiberwire (Arthrex, Naples, FL, USA). These studies [1,19,20,53,55] unanimously agree that UHMWPE sutures have an Fig. 4 The arthroscopic rotator cuff repair.…”

“…Recommendations are for best biomechanical construct, not necessarily best clinical outcome. Data pooled from multiple sources [1,19,20,53,55,81,82] Knee Surg Sports Traumatol Arthrosc (2009) …”

Pullout strength of all suture anchors in the repair of rotator cuff tears: a biomechanical study

“…Traction force was applied perpendicular to the bovine bone surface, which is very different in vivo, where the angle of tendon-force application with respect to the bone surface is more acute, variable according to the position of the shoulder and depends on the type of repair (single or double row). However, application of vertical tension force prevents thread ruptures at the eyelet and potentiates detachment resistance of SAs compared with angular tension tests [25,26]. Applying the pullout test at one angle only did not allow us to determine ASA behaviour during a pullout test at a greater angle and thus its absolute detachment resistance in vivo.…”

Reconstruction of the Retracted Nasal Alar Margin

“…These are the anchor to bone strength, the suture to anchor strength, and the tissue to suture strength. 17 The absorption characteristics of a bioabsorbable polymer vary with its chemical composition, molecular weight, crystalline to amorphous ratio, implant geometry, and other factors. 18 To the extent that the bioabsorbable suture and anchor materials differ, there will be a dynamic relationship between the degradation rates of the two polymers that may change the relative strength of the bone/anchor and anchor/suture interface strengths over time which can influence clinical performance.…”

“…16,25 In reality, there is probably no clinical application in which the in situ force vector will exactly mimic this, as it will generally contain components parallel to and perpendicular to the axis of the device. 17 In the case of the brow lift procedure, there would be little force vector directed to extract the anchor, but rather, most of the tissue force would be perpendicular to the bone tunnel and parallel to the bone surface. It is also important to direct the angle of suture pull with respect to the anchor in a direction that mimics the anticipated clinical vector since the integrity of the suture/anchor eyelet interface will depend on the presence of local stress concentrators within the eyelet that may change with angular position.…”