PURPOSE To compare corneal biomechanical properties following three different transplantation techniques, including Descemet stripping automated endothelial keratoplasty (DSAEK), deep anterior lamellar keratoplasty (DALK) and penetrating keratoplasty (PK) in comparison to normal eyes. METHODS This cross-sectional comparative study included 118 eyes: 17 eyes of 17 patients received DSAEK, 23 e...

Cervical fusion is a traditional procedure for the treatment of singleand multi-level spondylotic myleopathy or radiculopathy. The stand-alone graft has been shown to be less effective in providing the stability to construct especially with multi-level decompression. Additional stabilization of stand-alone grafting with anterior instrumentation (plate and screws), posterior instrumentation (rod...

Autologous bone-patellar tendon-bone autograft is a common choice for anterior cruciate ligament reconstruction and from both biologic and biomechanical perspectives is well-suited for this purpose. A centrally harvested, 10 mm wide patellar tendon graft has an estimated initial load-to-failure of 2977 N, and interference screw fixation of associated bone blocks provides initial pull-out streng...

purpose: to compare intraocular pressure (iop) readings measured by the ocular response analyzer (ora) with those measured by the goldmann applanation tonometer (gat) in keratoconic eyes following penetrating keratoplasty (pkp) and to evaluate the influence of anatomical and biomechanical properties of the grafts on iop measurements. methods: this cross-sectional study was conducted on 45 kerat...

Background: Several conduit configurations, such as straight graft (SG), Valsalva (VG), anticommissural plication (ACP), and the Stanford modification (SMOD) technique, have been described for valve-sparing aortic root replacement (VSARR) procedure. Prior ex vivo studies evaluated impact of configurations on biomechanics, but mock coronary artery circuits used could not replicate physical prope...

PURPOSE To quantify long-term changes in stromal collagen ultrastructure following penetrating keratoplasty (PK), and evaluate their possible implications for corneal biomechanics. METHODS A pair of 16 mm post-mortem corneo-scleral buttons was obtained from a patient receiving bilateral penetrating keratoplasty 12 (left)/28 (right) years previously. Small-angle x-ray scattering quantified col...

STUDY DESIGN Comparative evaluation of in vitro and in vivo biomechanics, resulting fusion and histomorphometric aspects of polyetheretherketone (PEEK) versus titanium (Ti) interbody fusion devices in an animal model with similar volumes of bone graft. OBJECTIVE Identify differences in the characteristics of fusion and biomechanics immediately following implantation (time 0) and at 26 weeks w...

purpose : to compare intraocular pressure (iop) readings measured by the ocular response analyzer (ora) with those measured by the goldmann applanation tonometer (gat) in keratoconic eyes following penetrating keratoplasty (pkp) and evaluate the influence of anatomical and biomechanical properties of the grafts on the iop measurements methods : in this cross-sectional study conducted on 45 kera...