IMPORTANCE Visual acuity is the most frequently performed measure of visual function in clinical practice and most people worldwide living with visual impairment are living in low- and middle-income countries. OBJECTIVE To design and validate a smartphone-based visual acuity test that is not dependent on familiarity with symbols or letters commonly used in the English language. DESIGN, SETT...

Background High tibial osteotomy (HTO) is a valuable treatment option in the high-demand patient with chondral damage and an altered mechanical axis. Traditional opening wedge HTO performed with metal plates has several limitations, including hardware irritation, obscuration of detail on magnetic resonance imaging, and complexity of revision surgery. Recently, an all-polyetheretherketone (PEEK)...

Introduction: Polyetheretherketone (PEEK) as a biomaterial has been used in spinal implants since the 1990s. Initially, it was used for plating and interbody systems, but recently PEEK has been utilized in the posterior regions of the spine as spinal rods. The concepts of “better load sharing” and “less bone-screw interface stresses” are terms that have arisen to describe lumbar PEEK spinal dev...

BACKGROUND Both the material and geometry of a total knee arthroplasty (TKA) component influence the induced periprosthetic bone strain field. Strain, a measure of the local relative deformation in a structure, corresponds to the mechanical stimulus that governs bone remodeling and is therefore a useful in vitro biomechanical measure for assessing the response of bone to new implant designs and...

Abstract Polyether-etherketone (PEEK) is a corrosion-resistant material that has been widely used in aqueous lubrication. However, its anti-wear performance must be improved for application the industry. In this study, to improve of PEEK boundary lubrication, PEEK/MoS 2 composites were prepared by ball-milling and spark plasma sintering processes. A competitive MoS mechanism between low shear s...

BACKGROUND Anterior cervical discectomy with fusion (ACDF) is challenging with respect to both patient selection and choice of surgical procedure. The aim of this study was to evaluate the clinical outcome of ACDF, with respect to both patient selection and choice of surgical procedure: fusion with an autologous iliac crest graft (AICG) versus fusion with an artificial cage made of polyethereth...

Orthopedic implants should have sufficient strength and promote bone tissue regeneration. However, most conventional are optimized for use either under high mechanical load or active osseointegration. To achieve the dual target of durability biocompatibility, polyether ether ketone (PEEK) filaments reinforced with internal titanium dioxide (TiO2) nanoparticles via dopamine-induced polymerizatio...

Aysha Arif, Zainab Haji and Robia Ghafoor* Author Affiliations Department of Surgery, Aga Khan University Hospital, Pakistan Received: May 23, 2022 | Published: June 01, Corresponding author: Ghafoor, BDS, FCPS (Operative Dentistry & Endodontics), Assistant Professor Karachi, DOI: 10.26717/BJSTR.2022.44.007023

Electrically conductive polymers reinforced with carbon nanotubes (CNTs) have generated a great deal of scientific and industrial interest in the last few years. Advanced thermoplastic composites made of three different weight percentages (8%, 9%, and 10%) of multiwalled CNTs and polyether ether ketone (PEEK) were prepared by shear mixing process. The temperature- and pressure-dependent electri...

Objective Surgical treatments for early onset scoliosis (EOS) typically require multiple operations and many complications. A more flexible growing rod construct might result in a more flexible spine with fewer complications. Polymer rods (polyetheretherketone, PEEK) are relatively flexible in bending, and so might allow for greater range of motion (ROM) during treatment. The purpose of this st...