Biomechanical study of the funnel technique applied in thoracic pedicle screw replacement.
Afr Health Sci
; 14(3): 716-24, 2014 Sep.
Article
en En
| MEDLINE
| ID: mdl-25352893
ABSTRACT
BACKGROUND:
Funnel technique is a method used for the insertion of screw into thoracic pedicle.AIM:
To evaluate the biomechanical characteristics of thoracic pedicle screw placement using the Funnel technique, trying to provide biomechanical basis for clinical application of this technology.METHODS:
14 functional spinal units (T6 to T10) were selected from thoracic spine specimens of 14 fresh adult cadavers, and randomly divided into two groups, including Funnel technique group (n = 7) and Magerl technique group (n = 7). The displacement-stiffness and pull-out strength in all kinds of position were tested and compared.RESULTS:
Two fixed groups were significantly higher than that of the intact state (P < 0.05) in the spinal central axial direction, compression, anterior flexion, posterior bending, lateral bending, axial torsion, but there were no significant differences between two fixed groups (P > 0.05). The mean pull-out strength in Funnel technique group (789.09 ± 27.33) was lower than that in Magerl technique group (P < 0.05).CONCLUSIONS:
The Funnel technique for the insertion point of posterior bone is a safe and accurate technique for pedicle screw placement. It exhibited no effects on the stiffness of spinal column, but decreased the pull-out strength of pedicle screw. Therefore, the funnel technique in the thoracic spine affords an alternative for the standard screw placement.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Enfermedades de la Columna Vertebral
/
Vértebras Torácicas
/
Tornillos Óseos
/
Procedimientos Ortopédicos
Tipo de estudio:
Clinical_trials
/
Diagnostic_studies
Límite:
Adult
/
Female
/
Humans
/
Male
/
Middle aged
Idioma:
En
Revista:
Afr Health Sci
Asunto de la revista:
MEDICINA
/
SERVICOS DE SAUDE
Año:
2014
Tipo del documento:
Article
País de afiliación:
China