Biomaterial Database

[Screwing into the pedicles of the lower lumbar spine (L3-L4-L5) and the lumbosacral joint]. 1984

J M Fuentes, and F Bonnel

In cases in which fixation of the lower lumbar vertebrae by plates is performed, the insertion of screws into the pedicles may be difficult. After an anatomical study the authors conclude that a partial resection of the articular facet of the superior vertebra allows improved insertion of antero-posterior screws in the pedicles. At the level of the fifth lumbar vertebra, the direction of the screws should be 10 degrees downwards. At the level of the sacrum it should be 30 degrees downwards. Screws of 15 mm length can be used in adults.

UI	MeSH Term	Description	Entries
D008159	Lumbar Vertebrae	VERTEBRAE in the region of the lower BACK below the THORACIC VERTEBRAE and above the SACRAL VERTEBRAE.	Vertebrae, Lumbar
D011859	Radiography	Examination of any part of the body for diagnostic purposes by means of X-RAYS or GAMMA RAYS, recording the image on a sensitized surface (such as photographic film).	Radiology, Diagnostic X-Ray,Roentgenography,X-Ray, Diagnostic,Diagnostic X-Ray,Diagnostic X-Ray Radiology,X-Ray Radiology, Diagnostic,Diagnostic X Ray,Diagnostic X Ray Radiology,Diagnostic X-Rays,Radiology, Diagnostic X Ray,X Ray Radiology, Diagnostic,X Ray, Diagnostic,X-Rays, Diagnostic
D001860	Bone Plates	Implantable fracture fixation devices attached to bone fragments with screws to bridge the fracture gap and shield the fracture site from stress as bone heals. (UMDNS, 1999)	Bone Plate,Plate, Bone,Plates, Bone
D001863	Bone Screws	Specialized devices used in ORTHOPEDIC SURGERY to repair bone fractures.	Bone Screw,Screw, Bone,Screws, Bone
D006801	Humans	Members of the species Homo sapiens.	Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000328	Adult	A person having attained full growth or maturity. Adults are of 19 through 44 years of age. For a person between 19 and 24 years of age, YOUNG ADULT is available.	Adults
D012447	Sacrum	Five fused VERTEBRAE forming a triangle-shaped structure at the back of the PELVIS. It articulates superiorly with the LUMBAR VERTEBRAE, inferiorly with the COCCYX, and anteriorly with the ILIUM of the PELVIS. The sacrum strengthens and stabilizes the PELVIS.	Sacra,Sacral Vertebra,Sacral Vertebrae,Sacrums,Vertebra, Sacral,Vertebrae, Sacral
D013123	Spinal Fusion	Operative immobilization or ankylosis of two or more vertebrae by fusion of the vertebral bodies with a short bone graft or often with diskectomy or laminectomy. (From Blauvelt & Nelson, A Manual of Orthopaedic Terminology, 5th ed, p236; Dorland, 28th ed)	Spondylodesis,Spondylosyndesis,Fusion, Spinal,Fusions, Spinal,Spinal Fusions,Spondylodeses,Spondylosyndeses
D013131	Spine	The spinal or vertebral column.	Spinal Column,Vertebrae,Vertebral Column,Vertebra,Column, Spinal,Column, Vertebral,Columns, Spinal,Columns, Vertebral,Spinal Columns,Vertebral Columns