Sökning: "pedicle screw"

Hittade 5 avhandlingar innehållade orden pedicle screw.

  1. 1. Fixation of Spinal Implants : Clinical and Experimental Studies on the Effects of Hydroxyapatite Coating

    Författare :Bengt Sandén; Acke Ohlin; Uppsala universitet; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; Surgery; Hydroxyapatite; pedicle screw; histomorphometry; fixation; radiolucent zones; screw loosening; Kirurgi; Surgery; Kirurgi; Orthopaedics; ortopedi;

    Sammanfattning : Loosening of implants is a frequent complication in orthopaedic surgery. The aim of this thesis was to evaluate hydroxyapatite coating of pedicle screws with mechanical and histological methods and to correlate the results with the radiological findings.Hydroxyapatite (HA) coating of pedicle screws was investigated in experimental studies in sheep. LÄS MER

  3. 2. Adolescent Idiopathic Scoliosis. The Role of Low Dose Computed Tomography

    Författare :Kasim Abul-Kasim; Malmö Diagnostisk radiologi; []
    Nyckelord :MEDICIN OCH HÄLSOVETENSKAP; MEDICAL AND HEALTH SCIENCES; low-dose spine CT; effective dose; screw misplacement; adolescent idiopathic scoliosis; outcome.; titanium screws; image quality; neurovascular complication; phantom;

    Sammanfattning : Continuous implementation of new operative methods for correction and stabilization of spinal deformities in young patients with AIS demands a detailed morphological analysis of the vertebral column. CT spine according to protocols available in daily clinical practice means high radiation dose to these young individuals. LÄS MER

  4. 3. Augmented navigation

    Författare :Gustav Burström; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : Spinal fixation procedures have the inherent risk of causing damage to vulnerable anatomical structures such as the spinal cord, nerve roots, and blood vessels. To prevent complications, several technological aids have been introduced. LÄS MER

  5. 4. Lumbar fusion for chronic low-back pain in isthmic spondylolisthesis

    Författare :Per Ekman; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :Exercise; Outcome; Long-term; interbody fusion; spinal fusion; lumbar; Adjacent segment degeneration; Isthmic spondylolisthesis; Degenerative disc disease; Chronic low back pain; predictor; prospective; pain drawing; sciatica; psychologic screening; Randomized controlled trial;

    Sammanfattning : Manifestation of isthmic spondylolisthesis (IS), with a prevalence of 5% in the general population, varies from totally asymptomatic to severe disability. Although fusion has positive short-term effects, the long-term outcome of such treatment, as well as possible accelerated degeneration of adjacent segment discs (ASD) and its clinical significance, are unknown. LÄS MER

  7. 5. Idiopathic scoliosis : aspects on surgical and non-surgical treatment

    Författare :Anastasios Charalampidis; Karolinska Institutet; Karolinska Institutet; []
    Nyckelord :;

    Sammanfattning : The term scoliosis has been used to describe conditions that lead to deformation of the spine. It derives from the ancient Greek ‘σκολίωσις’ and the root word ‘σκολιός’ which means ‘bent or crooked’. In its most common form, scoliosis is of unknown - idiopathic - cause and origin. LÄS MER