Portal de Periódicos da CAPES

Artigo Acesso aberto Produção Nacional Revisado por pares

BIBTEX RIS

A influência da incompatibilidade do macho de rosca na resistência à extração do parafuso pedicular

2022; Thieme Medical Publishers (Germany); Volume: 57; Issue: 02 Linguagem: Inglês

10.1055/s-0041-1732390

1982-4378

Rômulo Pedroza Pinheiro, Raffaello de Freitas Miranda, Antônio Carlos Shimano, Thibault Chandanson, Keri George, Helton Luíz Aparecido Defino,

Scoliosis diagnosis and treatment

Objective We aimed to study the "in vitro" pullout strength of SpineGuard/Zavation Dynamic Surgical Guidance Z-Direct Screw (DSG Screw, SpineGuard Inc, Boulder, Colorado, USA), a screw designed to be inserted using a direct insertion technique. Methods Dynamic Surgical Guidance Screws of 5.5 and 6.5 mm were introduced into polyurethane blocks with a density of 10 PCF (0,16g/cm 3 ). According to the experimental group, screws were inserted without pilot hole, with pilot without tapping, undertapping and line-to-line tapping. Screw pullout tests were performed using a universal test machine after screw insertion into polyurethane blocks. Results Screws inserted directly into the polyurethane blocks without pilot hole and tapping showed a statistically higher pullout strength. Insertion of the screw without tapping or with undertapping increases the pullout screw strength compared with line-to-line tapping. Conclusion Dynamic Surgical Guidance Screw showed the highest pullout strength after its insertion without pilot hole and tapping.