LeFort fracture

fracture,

n a break or rupture of a part. In the oral region, fracture is most often seen in teeth and bones.

fracture, avulsion,

n the loss of a section of bone.

fracture, blow-out,

n a fracture involving the orbital floor, its contents, and the superior wall of the maxillary antrum, in which orbital contents are incarcerated in the fracture area, producing diplopia.

fracture, bulk,

n a fracture or failure in the amalgam of a restoration. An improperly finished restoration by the dental professional, poor cavity design, or improper loading of the restoration can lead to a bulk fracture.

fracture, cementum,

n the tearing of fragments of the cementum from the tooth root.

fracture, clasp,

n failure of a clasp arm because of stresses that have exceeded the elastic limit of the metal from which the arm was made.

fracture, closed reduction of,

n a reduction and fixation of fractured bones without making a surgical opening to the fracture site.

fracture, comminuted,

n a fracture in which the bone has several lines of fracture in the same region; a fracture in which the bone is crushed and splintered.

fracture, compound,

n a fracture in which the bony structures are exposed to an external environment.

fracture, craniofacial dysjunction (transverse facial fracture),

n a complex fracture in which the facial bones are separated from the cranial bones; a LeFort III fracture.

fracture, dislocation,

n a fracture of a bone near an articulation, with dislocation of the condyloid process.

fracture, fissured,

n a fracture that extends partially through a bone, with no displacement of the bony fragments.

fracture fixation,

n the fractured fragments of bone are stabilized in close proximation to promote healing.

fracture, greenstick,

n a fracture in which the bone appears to be bent; usually only one cortex of the bone is broken.

fracture, Guérin's

(gāraz´),
n.pr a LeFort I fracture of the facial bones in which there is a bilateral horizontal fracture of the maxillae.

fracture, impacted,

n a fracture in which one fragment is driven into another portion of the same or an adjacent bone.

fracture, indirect,

n a fracture at a point distant from the primary area of injury caused by secondary forces.

fracture, intraarticular,

n a fracture of the articular surface of the condyloid process of a bone.

fracture, intracapsular,

n a fracture of the condyle of the mandible occurring within the confines of the capsule of the temporomandibular joint.

fracture, LeFort,

n.pr a transverse fracture involving the orbital, malar, and nasal bones.

LeFort classifications.

fracture, midfacial,

n fractures of the zygomatic, maxillary, nasal, and associated bones.

fracture, pyramidal,

n a fracture of the midfacial bones, with the principal fracture lines meeting at an apex in the area of the nasion; a LeFort II fracture.

fracture, root,

n a microscopic or macroscopic cleavage of the root in any direction.

fracture, simple,

n a linear fracture that is not in communication with the exterior.

fracture, stress,

n 1. a type of stress usually occuring from sudden, strong, violent, endogenous force, such as a simple fracture of the fibula in a runner.
2. the fracture of metallic parts as a result of fatigue of prolonged or frequent stress.

Tooth fracture.

fracture, tooth,

n a traumatic injury to a tooth that manifests itself as a chip, crack, or break. Manifestations may also include dislocation or complete displacement of a tooth.

fracture toughness,

n the quality of the material used for brackets that indicates its ability to withstand applied force without cracking.

fracture, transverse facial,

n See fracture, craniofacial dysjunction.

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LeFort fracture

Orthopedics A bilateral fracture of the maxilla, which is divided into 3 types, defined by R LeFort in 1901

LeFort fractures  

I  Dentoalveolar dysjunction Fracture lines are transverse through the pyriform aperature above the alveolar ridge and pass posteriorly to the pterygoid region; the diagnosis is suggested by lip lacerations, clinical malocclusion, mobility of the fractures bone when the examiner moves the incisor teeth

II Pyramidal fracture Superior fracture lines are transverse through the nasal bone and/or maxillary articulation; diagnosis is suggested by free mobility of anterior maxilla

III Craniofacial dysjunction Central third of face is separated from base of skull; diagnosis is suggested by major facial edema, ecchymosis, and facile mobility of middle third of face by examiner; LeFort III is the most severe midfacial fracture, and may require open reduction and internal fixation Sabiston, Ed, Textbook of Surgery, 14 th ed, WB Saunders, 1991