Publications by authors named "U K Dhar"

Article Synopsis
  • The study investigates the biomechanical effects of different internal fixation techniques for high-grade L5-S1 spondylolisthesis, focusing on how stiffness and hardware stress impact outcomes.
  • A finite element model of the lumbar spine was created to simulate high-grade spondylolisthesis and assess three treatment methods: anterior plate system (APS), bilateral pedicle screw system (BPSS), and transdiscal screw system (TSS).
  • Results showed that while all treatments reduced range of motion, TSS had the best resistance to shear forces and lower internal fixation stress, although it increased stress on the adjacent annulus compared to APS and BPSS.
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Objectives: Lumbar spinal stenosis (LSS) refers to a narrowing of the space within the spinal canal, which can occur at any level but is most common in the lumbar spine. Open laminectomy and minimally invasive laminectomy (MIL) procedures are the most common surgical gold standard techniques for treating LSS. This study aims to review clinical and biomechanical literature to draw comparisons between open laminectomy and various MIL techniques.

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Introduction: S1-L5 transdiscal screw fixation is a direct stabilization technique used for surgical treatment of high-grade (III-IV) L5-S1 spondylolisthesis. It has not been used for nonspondylolisthetic cases or in combination with an interbody cage (IC). This study aimed to develop a novel, direct S1-L5 sacrolumbar interbody fusion (SLIF) technique, a combination of IC and sacrolumbar transdiscal screw.

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Aim: (1) To compare the temperature rise in the pulp chamber with different resin materials used for making provisional fixed partial dentures in anterior and posterior region while using Polyvinylsiloxane impression materials as matrix. (2) To identify a superior provisionalization material based on the amount of heat dissipated suitable for anterior and posterior provisional fixed partial denture fabrication.

Settings And Design: Temporary crowns and bridges are integral to Fixed Prosthodontics.

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Cervical degenerative disc diseases such as myelopathy and radiculopathy often require conventional treatments like artificial cervical disc replacement or anterior cervical discectomy and fusion (ACDF). When designing a medical device, like the stand-alone cage, there are many design inputs to consider. However, the precise biomechanics of the force between the vertebrae and implanted devices under certain conditions require further investigation.

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