Changes in surface characteristics of moderately roughened grade iv titanium disc following a standardised implantoplasty technique: an in-vitro study

Aim: To analyze the changes in surface characteristics of moderately roughened grade IV titanium discs following a standardized implantoplasty protocol. Materials and Method: Nine moderately roughened titanium discs (ø9.0 mm; 2-mm thickness) with a comparable surface to commercially available oral implants (Southern Implants (Pty) Ltd, Irene, South Africa) were used. One disc was used as a control sample while the remaining 8 discs were modified using a standardized technique. Each disc was divided into 4 sections of which each quadrant was instrumented in the same manner. Regular grit and superfine grit diamond burs were used for 10s each, followed by brown and green silicone burs for 15s respectively. The surface characteristics of all samples were analysed using scanning electron microscopy (SEM), confocal laser scanning microscopy (CLSM), and energy dispersive x-ray spectroscopy (EDS). Results: SEM analysis of the surfaces showed that as the instrumentation progressed from diamond burs to silicone burs, surface irregularities began to diminish. However, using silicone burs tended to increase the amount of surface debris and the roughness still remained significantly higher than the control sample. EDS identified some foreign elements originating from the silicone burs that were used. Conclusion: The proposed standardized implantoplasty protocol did not decrease the roughness of the surface below that of the control disc. The clinical implications of foreign elements remaining on the titanium surfaces need further investigation.

Estudio de la copa Fitek en artroplastía total de cadera. Informe preliminar / A study of the Fitek cup in total hip arthroplasty. Preliminary report

La cadera desempeña un papel importante en la transmisión del peso corporal, y la movilidad del individuo, la destrucción de ésta por cualquier causa, hará necesario el uso de un implante que se busca, tenga mínimas complicaciones, como el aflojamiento y el desgaste, hoy en día el uso de nuevas copas que se adhieren cada vez mejor al hueso por medio de presión con el consecuente depósito de nuevo hueso en su interior hace ofrecer una mejor estabilidad a los pacientes. En este estudio se analizó clínica y radiológicamente la osteointegración de la copa con cubierta de Sulmesh Fitek en pacientes con coxartrosis mixta, sin osteoporosis o con fracturas de cadera. Mostrando que el éxito depende de que el defecto quirúrgico sea muy pequeño, que se preserve el hueso subcondral en el acetábulo, que la fijación sea perfecta. Los resultados a corto y mediano plazo, fueron excelentes y la colocación es sencilla