Intra-operative measurement of vertebral bone strength.
Stud Health Technol Inform
; 88: 326-30, 2002.
Article
en En
| MEDLINE
| ID: mdl-15456055
A significant complication of surgical correction of the deformed spine is pull out of the vertebral hooks or screws. This complication can be partly attributed to poor bone stock. Currently, there are few methods available for surgeons to assess the mechanical strength and stiffness of the vertebra, and even fewer methods that provide in-vivo measurements. An "upbiter" is often used to form a seat in the lamina for the hook. A typical upbiter was modified and instrumented with strain gauges to investigate the feasibility of determining the forces and displacements needed to cut through laminar bone during surgical procedures. The calibration showed that the system was repeatable and could highly correlated with applied force (R2=0.98) and displacement (R2=0.99) with resolutions of 0.72 N and 0.40 mm respectively. This system was tested on three females, on lamina ranging from T4 to T12 regions. The average maximum force for bone failure was at 470+/-128N.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Escoliosis
/
Columna Vertebral
Límite:
Female
/
Humans
Idioma:
En
Revista:
Stud Health Technol Inform
Asunto de la revista:
INFORMATICA MEDICA
/
PESQUISA EM SERVICOS DE SAUDE
Año:
2002
Tipo del documento:
Article
Pais de publicación:
Países Bajos