A biomechanical evaluation of a Hybrid Dynamic Compression Plate and a CastLess Arthrodesis Plate for pancarpal arthrodesis in dogs.
Vet Surg
; 41(6): 738-44, 2012 Aug.
Article
em En
| MEDLINE
| ID: mdl-22642497
ABSTRACT
OBJECTIVE:
To determine mechanical differences between two plates with different requirements for supplementary casting after pancarpal arthrodesis (PCA) the Veterinary Instrumentation Hybrid Dynamic Compression Plate (HDCP), and the OrthoMed CastLess Arthrodesis Plate (CLP). STUDYDESIGN:
In vitro mechanical analysis. SAMPLE POPULATION HDCP(n = 10), CLP(10).METHODS:
Single-cycle load to failure using a materials-testing machine and cyclic loading between 38 and 380 N ± 5% to simulate estimated in vivo loads until failure or 10(6) cycles.RESULTS:
Single-cycle to failure bending stiffness was significantly higher for the HDCP(2269 ± 175 N/mm) than CLP(1754 ± 88 N/mm; P < .001). Bending structural stiffness was higher for the HDCP(3.8 ± 0.3 Nm(2) ) versus CLP(2.9 ± 0.2 Nm(2) ; P= .0022). A difference between the 2 plates for bending strength was not demonstrated; HDCP= 13.9 ± 1.4 Nm, CLP13.2 ± 0.5 Nm (P= .24). Cyclic Loading no failures occurred with either plate type when plates were cycled to 10(6) cycles.CONCLUSION:
There is no mechanical advantage in bending resistance afforded by the CLPover the HDCP. Fatigue failure of either plate during the convalescent period of an estimated 150,000-250,000 cycles is unlikely. Based on the bending performance, there is no evidence to support the use of the CLPover the HDCPfor castless PCA.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Artrodese
/
Placas Ósseas
/
Teste de Materiais
/
Cães
/
Instabilidade Articular
Limite:
Animals
Idioma:
En
Revista:
Vet Surg
Ano de publicação:
2012
Tipo de documento:
Article
País de afiliação:
Reino Unido