Glossary entry (derived from question below)
English term or phrase:
distraction cage
Portuguese translation:
dispositivo de distração óssea
English term
Portugal
Translating is my life
Native in: Portuguese (Variant: European/Portugal) 
Works in: Spanish to Portuguese, English to Portuguese, French to Portuguese, and 6 more.
distraction cage
a An extended dorsal laminectomy
b A fenestration of the C6-C7 space and the two adjacent spaces
c A ventral corpectomy
d Placement of a distraction cage
Proposed translations
Portugal
Maria Teresa Borges de Almeida 
30+ years translating EU documents
Native in: Portuguese (Variant: European/Portugal)
Works in: English to Portuguese, French to Portuguese, Spanish to Portuguese, and 1 more.
dispositivo de distração óssea
https://www.google.com/search?q="dispositivo de distração ós...
A Fig. 11 do documento seguinte apresente o dispositivo em questão:
https://repositorium.sdum.uminho.pt/bitstream/1822/76454/1/D...
Brazil
32 years engineering/law/contracts
Native in: English (Variant: US) , Portuguese (Variant: Brazilian) 
Works in: English to Portuguese, Portuguese to English
Brazil
Technical & Game Translations
Native in: Portuguese (Variant: Brazilian)
Works in: English to Portuguese
gaiola/cage de distração
| agree |
Dora Matos
: Certíssimo. Não há porque omitir "distração", afuncionalidade da cage.
17 mins
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United States
BA in Transl., MA in ESL, 15 yrs of exp.
Native in: Portuguese
Works in: English to Portuguese, Portuguese to English, Spanish to Portuguese, and 2 more.
caixa de osteossíntese expansiva
Distraction cages:
"The cages can distract the disc spaces to normal heights, apply tension to the annulus and spinal ligaments, widen the neural foramen, place the implants under compression, and eliminate segmental motion to stabilize the spine." https://www.barrowneuro.org/for-physicians-researchers/educa...
Note o uso de "distract" e "widen" no parágrafo anterior.
Termos correlatos em francés e português:
EP97919092A 1996-09-13 1997-09-12 Cage d'osteosynthese expansive
PT97919092T 1996-09-13 1997-09-12 Caixa de osteo-sintese expansiva https://patents.google.com/patent/FR2753368B1/pt
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Note added at 1 hr (2023-08-03 23:56:54 GMT)
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Outra opção seria "caixa cervical". Baseado na explicação acima, penso que "caixa de osteossíntese expansiva" faz mais sentido.
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Note added at 1 hr (2023-08-04 00:04:38 GMT)
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distract: draw away or divert https://www.dictionary.com/browse/distract
Conforme explicado na citação em inglês, as caixas de osteossíntese expansivas "afastam os espaços entre os discos [vertebrais]".
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