SciELO - Scientific Electronic Library Online

 
vol.46 número1Lavage drain extension for local anaesthetic instillation into abdominal woundsIs total glossectomy for advanced carcinoma of the tongue justified? índice de autoresíndice de materiabúsqueda de artículos
Home Pagelista alfabética de revistas  

Servicios Personalizados

Articulo

Indicadores

Links relacionados

  • En proceso de indezaciónCitado por Google
  • En proceso de indezaciónSimilares en Google

Compartir


South African Journal of Surgery

versión On-line ISSN 2078-5151

Resumen

LOWNIE, J. F.; BETTS, P. A.; BRYANT, R. S.  y  CLEATON-JONES, P.. Torque removal force for osseointegrated implants - two experimental studies. S. Afr. j. surg. [online]. 2008, vol.46, n.1, pp. 18-20. ISSN 2078-5151.

OBJECTIVE: To introduce a rabbit-based model for testing the torque removal force (TRF) of implants and to compare the TRF of a series of titanium implants. METHODS: Two experiments were performed at the University of the Witwatersrand. In the first, a Swedish- (SSM-N) or a South African-manufactured (SSM-S) implant was implanted into the tibiae of 12 rabbits and the TRF measured at 1, 3 and 6 months. In the second experiment, the TRF of 4 South African-manufactured titanium implants in the tibia or femur of 32 rabbits were compared at 3 and 6 weeks. The implants were: 1 threaded machined (SSM-S), and 3 surface-enhanced - 1 threaded (SLA), 1 threaded tapered (MTT) and 1 pitted (RI). RESULTS: In experiment 1, TRF increased significantly with time (p<0.05) but there was no significant difference between TRF for the South African and Swedish machined-surface implant types. In experiment 2, the TRF of the MTT implant was significantly greater (p<0.0001) than the other 3 types, which did not differ significantly from each other. Time had no significant effect. CONCLUSION: In an internationally used rabbit-based model, South African and Swedish machined-surface titanium implants were equivalent; surface-enhanced implants produced higher TRF, and a tapered implant showed the highest TRF.

        · texto en Inglés     · Inglés ( pdf )

 

Creative Commons License All the contents of this journal, except where otherwise noted, is licensed under a Creative Commons Attribution License