Abstract: A method of preparing a polymer powder composition suitable for selective laser sintering and a powder composition obtained from the same. The polymer composition comprising at least two polyetherketoneketone polymorphs, each of the polymorphs having a different melting peak in a melting temperature range. The polymer is heated at a temperature below the lowest of the polymorphs melting peaks thereby decreasing the melting temperature range of the polymer composition. The treatment is especially useful with Cake B PEKK powder, which is otherwise unusable in SLS. Parts built from the treated powder using SLS have reduced surface anomalies and are easier to remove from the Cake bed.

Abstract: A medical/surgical irrigator comprising a handpiece and a tip assembly that is removably attached to the handpiece. Internal to the handpiece is a variable speed pulse pump from which irrigation fluid is discharged through the tip assembly. A single, variable speed motor regulates the pumping rate of the pump. The tip assembly includes a suction wand through which the discharged fluid is drawn away from the site to which the fluid is applied.