title: Cement pressurization after provisional repair of femoral cortical defects.
abstract: Cortical defects are common and problematic in cemented revision hip arthroplasty. Extruded cement can cause thermal injury, pain, and impingement. Decreased cement pressure limits bony interdigitation and leads to loosening. Historically, surgeons have used a finger to contain cement and improve pressure, and decrease porosity, but, with large or multiple defects, fingers are ineffective. Novel solutions--such as wrapping foil suture packaging or half a syringe barrel around the defects--have been previously published. In the study reported here, we used modern cementing techniques, continuous pressure monitoring, and porosity calculations to analyze the utility of the 3 provisional defect-fixation techniques. The foil and the hemisyringe worked as well as a finger (P > .05). All 3 techniques enhanced pressurization and maintained the porosity reduction. Although manually pressurizing cement and feeling resistance provide the surgeon with more tactile feedback, using the gun and a proximal adapter was more effective in improving pressure. Using these provisional defect-fixation techniques as well as a cement gun and proximal adapter can improve cement pressure and decrease porosity. These techniques are particularly useful with large or multiple cortical defects encountered in revision arthroplasty or total hip arthroplasty after open reduction.
authors.affiliation: Department of Orthopaedic Surgery, Providence Hospital, Southfield, Michigan, USA.
authors.forename: David C
authors.initials: DC
authors.lastname: Markel
authors.forename: Jeff
authors.initials: J
authors.lastname: Critchfield
authors.forename: Abby
authors.initials: A
authors.lastname: Chaffin
authors.forename: Paul H
authors.initials: PH
authors.lastname: Wooley
authors.forename: Michele J
authors.initials: MJ
authors.lastname: Grimm
mesh_terms: D000818:Animals; D002484:Cementation; D005269:Femur / Q000601:surgery*; D019637:Orthopedic Procedures; D011312:Pressure; D012756:Sheep