title: PAIN AT THE TIP OF THE STEM AFTER REVISION TOTAL KNEE ARTHROPLASTY.
abstract: OBJECTIVE
  To correlate parameters of implants with incidence of pain.
  
  
  METHODS
  32 knees (31 patients) operated on between 2006 to 2008 in a serie of cases of TKA revision surgery were monitored for evidence of pain at the tip of the stem. In all we used uncemented stem Scorpio TS Total Knee ® Revision System (Stryker ®). Criteria assessed: pain in the leg or thigh without other causes, diameter and length of the nail; position of the rod in the medullary canal, intramedullary canal diameter.
  
  
  RESULTS
  Mean age was 66.7 years and mean follow-up was 2.6 years.21,87% of patients reported leg pain, 9.37% thigh pain. The group of pacients with leg pain presented with shaft diameter 14.7 mm, length 80 mm in 71.42% and 155 mm in 28,58%, stem diameter/ intramedullary canal diameter average relation of 0,76, 42.8% had stem malalignment. The group without leg pain presented with shaft diameter 15.2 mm, length 80 mm in 68% and 155 mm in 32%, diameters average relation of 0.80, 20.8% had stem malalignment. The group with thigh pain presented with shaft diameter 18.3 mm, length 80 mm in 66.67% and 155 mm in 33,33%,diameters average relation of 0.75, 0% had stem malalignment The group without thigh pain presented with shaft diameter 16.56 mm, length 80 mm in 70.37% and 155 mm in 29,63%, diameters average relation of 0.79, 14,2% had stem malalignment.
  
  
  CONCLUSIONS
  There was no association between the assessed criteria and pain in the tip of the stem.
authors.affiliation: Resident Physicians of the Institute of Orthopedics and Traumatology, HC/FMUSP.
authors.forename: Rômulo Ballarin
authors.initials: RB
authors.lastname: Albino
authors.affiliation: Resident Physicians of the Institute of Orthopedics and Traumatology, HC/FMUSP.
authors.forename: Lívia Souza
authors.initials: LS
authors.lastname: Santos
authors.affiliation: Assistant Physicians of the Institute of Orthopedics and Traumatology, HC/FMUSP.
authors.forename: Riccardo Gomes
authors.initials: RG
authors.lastname: Gobbi
authors.affiliation: Assistant Physicians of the Institute of Orthopedics and Traumatology, HC/FMUSP.
authors.forename: Maurício
authors.initials: M
authors.lastname: Lamaguchi
authors.affiliation: Assistant Physicians of the Institute of Orthopedics and Traumatology, HC/FMUSP.
authors.forename: Marco Kawamura
authors.initials: MK
authors.lastname: Demange
authors.affiliation: Assistant Physicians of the Institute of Orthopedics and Traumatology, HC/FMUSP.
authors.forename: Luis Eduardo
authors.initials: LE
authors.lastname: Tirico
authors.affiliation: Assistant Physician and Head of the Knee Group of the Institute of Orthopedics and Traumatology, HC/FMUSP.
authors.forename: José Ricardo
authors.initials: JR
authors.lastname: Pécora
keywords: Arthroplasty; Knee; Knee Joint; Pain; Replacement