Morphological evaluation of eccentric sets guide-plates of dcp-l 4.5 mm.
OBJECTIVE
To carry out isolated and comparative evaluations of the measurements of the set eccentric guide plates used in 4.5mm surgical implants, and to determine the effect of these measurements on compression strength.


METHODS
Four eccentric guides, four large dynamic compression plates (L-DCP) from four local manufacturers, and a Vonder(®) 200 mm caliper brand were used. Five standard parameter measurements were created for the set eccentric guide-plate, which were identified as A to E. Four sets were made, using materials of the same factory, and identified as groups I to IV. The analyses were performed by measuring all the parameters from a ventral view of the plate, with the eccentric guide placed in the plate hole.


RESULTS
Groups I and II showed the same values for all the parameters. All the groups showed the same measurements for E = 8.15 e B = 3.60. Group III: A = 8.10mm, C = 3.25mm, D = 1.25mm. Group IV: A = 7.00mm, C = 3.10mm, D = 0.30mm. Maximum compression force was (F Max.): Group I 80.58 N, Group. II: F Max. 81.63 N, Group. III: F Max. 36.32N, Group. IV: F Max. 37.52N.


CONCLUSIONS
The measurements evaluated show a lack of standardization in the manufacture of orthopedic instruments and its effects on the values for compression strength.


METHODS
Level III, analytical study.
Department of Orthopedic and Traumatology of Hospital Regional do Gama do Distrito Federal (HRG -DF) - Brasília, DF, Brazil.
José Humberto de Souza
JH
Borges
Department of Orthopedic and Traumatology of Hospital Regional do Gama do Distrito Federal (HRG -DF) - Brasília, DF, Brazil.
Antonio Lisboa
AL
da Silva Filho
Department of Orthopedic and Traumatology of Hospital Regional do Gama do Distrito Federal (HRG -DF) - Brasília, DF, Brazil.
Francisco
F
Pereira Neto
Department of Orthopedic and Traumatology of Hospital Regional do Gama do Distrito Federal (HRG -DF) - Brasília, DF, Brazil.
Walter Rodrigo
WR
Daher
Department of Orthopedic and Traumatology of Hospital Regional do Gama do Distrito Federal (HRG -DF) - Brasília, DF, Brazil.
Alessandro Queiroz
AQ
de Mesquita
Department of Orthopedic and Traumatology of Hospital Regional do Gama do Distrito Federal (HRG -DF) - Brasília, DF, Brazil.
Anderson
A
Freitas
Biomechanics; Bone plates; Bone screws; Fracture fixation, internal/methods