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At least 1,711 records · Page 95Linked to original sources
PubMed1986

Internal fixation of the lumbar spine. The Hartshill rectangle.

The Hartshill rectangle fixation is a modification of the Luque system of segmental spinal instrumentation. The rectangle is formed from a 3/16-in stainless steel rod and incorporates a roof that allows it to fit snugly against the lamina and provides good rotational stability. The rectangle is secured to the spine by means of doubled 0.91-mm-diameter stainless steel wires. The technique of the Hartshill system in the lumbar spine is described in detail. The system has been used in 71 patients with good relief of pain and without major complication. In the first 45 cases, a simple, flat, unwelded rectangle was used, and in the last 26 the Hartshill rectangle was employed.

Adolescent↗
PubMed1986

Internal fixation of the lumbar spine with pedicle screw plating.

The results and complications of pedicle screw plate (PSP) stabilizations were investigated in lumbar fresh fractures, malunions, lumbar metastases, primary tumors, lumbosacral fusions, and highgrade spondylolisthesis. The low incidence of neurologic complications of PSP is noteworthy, and a reason for recommending the method.

Bone Plates↗
PubMed1986

An internal fixator for posterior application to short segments of the thoracic, lumbar, or lumbosacral spine. Design and testing.

A new spinal implant has been designed and biomechanical testing completed, intended for application to "short-segment" spinal defects such as disc degeneration, fracture, spondylolisthesis, or tumor. Major improvements over currently available devices include: only 2-3 vertebrae are spanned, not 5-7 as with Harrington rods; true three-dimensional fixation is achieved, preventing such problems as hook or rod dislocation; three-dimensional adjustment is easily accomplished, allowing fracture or spondylolisthesis reduction to be readily performed; attachment to vertebrae is by means of transpedicular screws eliminating deliberate encroachment into the spinal canal, such as Luque wires or Harrington hooks; no special alignment between screws is needed (such as with holes or slots in a plate), allowing screw placement to fully conform to anatomic structures; and laminectomy sites and lumbosacral junction are readily instrumented. Background investigations presented here for design of this device include: CT-defined pedicle morphometry showing that screws may be larger than those currently used; effect of pitch, minor diameter, and tooth profile on screw pull-out strength; mechanical testing of a compact, three-dimensionally adjustable, strong, nonloosening articulating clamp; and establishing of the relationship between depth of penetration and strength of fixation of transpeduncular screws.

Adolescent↗