BACKGROUND: The design of the Exeter stem may facilitate distal migration, but radiostereometric analysis (RSA) studies have been limited to 2 years of follow-up. PATIENTS AND METHODS: We followed migration of the Exeter femoral stems in 22 primary hip arthroplasties for 5 years with RSA. RESULTS: All stems migrated distally and the median migration at 2 years was 1.34 mm, while at 5 years it was 1.77 mm. 7 stems migrated above accuracy between 3 and 5 years. (RSA) evaluation of the cement mantle could be performed in 14 cases, and in 5 slight migration was found. Most of the stems rotated towards retroversion and the median rotation at 2 years was 1.2 degrees, while at 5 years it was 1.6 degrees. We found 1 patient with impending clinical failure but no deviation in the RSA migration pattern, and 1 patient with unstable migration pattern but no clinical symptoms. INTERPRETATION: We found a greater distal migration of the Exeter stem for longer periods of time than seen with other types of cemented implants. Copyright 2004 Taylor & Francis
BACKGROUND: The design of the Exeter stem may facilitate distal migration, but radiostereometric analysis (RSA) studies have been limited to 2 years of follow-up. PATIENTS AND METHODS: We followed migration of the Exeter femoral stems in 22 primary hip arthroplasties for 5 years with RSA. RESULTS: All stems migrated distally and the median migration at 2 years was 1.34 mm, while at 5 years it was 1.77 mm. 7 stems migrated above accuracy between 3 and 5 years. (RSA) evaluation of the cement mantle could be performed in 14 cases, and in 5 slight migration was found. Most of the stems rotated towards retroversion and the median rotation at 2 years was 1.2 degrees, while at 5 years it was 1.6 degrees. We found 1 patient with impending clinical failure but no deviation in the RSA migration pattern, and 1 patient with unstable migration pattern but no clinical symptoms. INTERPRETATION: We found a greater distal migration of the Exeter stem for longer periods of time than seen with other types of cemented implants. Copyright 2004 Taylor & Francis
Authors: Stefan Budde; Frank Seehaus; Michael Schwarze; Christof Hurschler; Thilo Floerkemeier; Henning Windhagen; Yvonne Noll; Max Ettinger; Fritz Thorey Journal: Int Orthop Date: 2015-09-25 Impact factor: 3.075
Authors: David Campbell; Graham Mercer; Kjell G Nilsson; Vanessa Wells; John R Field; Stuart A Callary Journal: Int Orthop Date: 2009-12-13 Impact factor: 3.075