Evaluation of a new power-operated PMMA vacuum mixing and delivery system for cemented femoral stem insertion.

Variations exist in the manual preparationand delivery of cement during primary total hip arthroplasty. The incorporation of a power source may standardize cement mantle manufacturing. This study prospectively compared the use of a new power-operated polymethylmethacrylate vacuum mixing and delivery system to a commonly used manually powered industry standard. The study did not reveal a significant difference in the quality of cement mantle grades when comparing the use of this power-operated system to an industry standard manual system. However, the benefit of the new preparation and delivery system may be in consistent porosity reduction and not in the improvement of cement mantle grading.