
1) Bone fracture
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https://www.crosswordclues.com/clue/sequestrum

A sequestrum (plural: sequestra) is a piece of dead bone that has become separated during the process of necrosis from normal or sound bone. It is a complication (sequela) of osteomyelitis. The pathological process is as follows: The sequestra are surrounded by sclerotic bone which is relatively avascular (without a blood supply). Within the bone ...
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http://en.wikipedia.org/wiki/Sequestrum

a piece of dead bone lying alongside, but separated from, the osseous bed whence it came. It is formed when a section of bone is deprived of its blood supply and the natural processes create a cleavage between the dead and the living bone. A sequestrum may be aseptic (sterile), as for example beneath a plate when there has been massive periosteal s...
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http://orthopaedics.org.uk/service/glossary/

• (n.) A portion of dead bone which becomes separated from the sound portion, as in necrosis.
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http://thinkexist.com/dictionary/meaning/sequestrum/

a piece of dead bone that has become separated during the process of necrosis from the sound bone.
Found on
http://users.ugent.be/~rvdstich/eugloss/DIC/dictio79.html

A piece of dead bone lying alongside, but separated from, the osseous bed whence it came. It is formed when a section of bone is deprived of its blood supply and the natural processes create a cleavage between the dead and the living bone. A sequestrum may be aseptic (sterile), as for example beneath a plate when there has been massive periosteal s...
Found on
http://www.encyclo.co.uk/local/20605

<orthopaedics, radiology> A piece of dead bone that has become separated during the process of necrosis from the sound bone. ... Sequelae of osteomyelitis, sequestrum, necrotic bone, often denser than surroundings, may be resorbed, discharged through a sinus tract, or persist as a focus of continued infection, involucrum, bone formed beneath ...
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http://www.encyclo.co.uk/local/20973

(se-kwes´trәm) a piece of dead bone that has become separated from sound bone during the process of necrosis. Formation of a sequestrum: (A), sound bone; (B), new bone; (C), granulations lining involucrum; (D), cloaca; (E), sequestrum. any tissue that has become seque...
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http://www.encyclo.co.uk/local/21001

A piece of dead tissue which has become isolated from the surrounding living tissue.
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http://www.encyclo.co.uk/visitor-contributions.php

Piece of dead bone
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http://www.encyclo.co.uk/visitor-contributions.php
Se·ques'trum noun ;
plural Sequestra . [ New Latin See
Sequester .]
(Medicine) A portion of dead bone which becomes separated from the sound portion, as in necrosis.
Found on
http://www.encyclo.co.uk/webster/S/71

A portion of dead bone which has become detached from the healthy bone tissue.
Found on
http://www.gadsbywicks.co.uk/uploaded/3822.pdf

Type: Term Pronunciation: sē-kwes′trŭm, -tră Definitions: 1. A piece of necrotic tissue, usually bone, which has become separated from the surrounding healthy tissue.
Found on
http://www.medilexicon.com/medicaldictionary.php?t=81160

sequestrum A piece of dead bone that has become separated during the process of necrosis from sound bone.
Found on
http://www.wordinfo.info/words/index/info/view_unit/1939/
No exact match found.