The activation of stretch-activated calcium channels (SACs) in keratocytes can induce spatially coordinated increases in traction stress that promote protrusion at the cell front, while simultaneously inducing retraction at the rear. To investigate how this occurs, we correlated calcium-induced changes in traction stress with alterations in cell speed and shape. Cyclic changes in these paramete...

This paper describes the design, modeling, fabrication and characterization of a micromachined array of high-density 3-dimensional microposts (100×100) made of flexible material (silicone elastomers) for use to measure quantitatively the cellular traction force and contractile events in isolated vascular smooth muscle cells (VSMCs). The micropost array was fabricated with diameters ranged from ...

This study was designed to measure the efficacy of a nasal valve suspension technique and determine the adequate traction length without creation of nasofacial fullness in a cadaveric model. Seven fresh frozen cadaveric heads were evaluated. Minimal cross-sectional (MCA) areas were measured with a transient-signal acoustic rhinometer (Ecco Vision; Hood Instruments, Pembroke, MA) before and afte...

This paper reports a case of late vitreomacular traction in a young patient secondary to toxoplasma retinochoroiditis resolved by vitrectomy. A 17-year-old female with chronic inflammatory bowel disease developed severe vitreomacular traction 8 months after resolution of ocular toxoplasmosis with medical therapy. Best-corrected visual acuity, full ophthalmic slit-lamp examination, colour fundus...

background: low back pain (lbp) is one of the most common musculoskeletal complications of today’s societies which, poses a big portion of health expenses and work absentees. lumbar disc herniation is claimed to be one of the several causes of lbp. conservative therapies like physiotherapy are found to be beneficial for treatment in such a kind of lbp. however, there is low evidence proving tra...

patients and methods sixty elderly patients with intertrochanteric fractures were randomized for treatment with either skeletal traction (group a) or an external fixation (group b). in this study patients at least 60 years of age, with ao/ota a1 or a2 type fracture and intertrochanteric fracture as a result of minor trauma, were enrolled. results acceptable reduction was achieved in eight and 2...

BACKGROUND SUMMARY The use of preoperative halo-gravity traction (HGT) improves both spinal deformity and pulmonary function and is a helpful adjuvant in the treatment of complex spinal deformity. Despite the benefits of preoperative HGT, there is no consensus on the optimal traction protocol. METHODS We evaluated the treatment of 33 patients treated with preoperative HGT to determine the saf...

the purpose of this study is to summarize the treatment options for scoliosis and spine deformities from antiquity through medieval times up to the renaissance. furthermore, it is to present the contribution of “the father of modern surgery”, ambroise paré (1510-1590), to this field. paré was a distinguished surgeon of the renaissance with many contributions to surgery, including war trauma, ob...

o bjectives: this study sought to assess distal and lateral forces and moments of asymmetric headgears by variable outer bow lengths. materials and methods : four 3d finite element method (fem) models of a cer- vical headgear attached to the maxillary first molars were designed in solidworks2010 software and transferred to ansys workbench ver. 11 software. modelscontained the first molars, thei...

Colorectal endoscopic submucosal dissection (ESD) still remains a technically difficult procedure. The maintenance of tissue tension and good submucosal exposure during dissection is one of the most important factors for an effective and safe dissection. Although various traction methods have been developed, traction by gravity is one of the most useful method for colorectal ESD. Traction using...