This prospective study conducted on 108 consecutive implantations of a straight, cementless, taper-designed stem with variable lateral-flare (Pegasus, DePuy, Warsaw, Indiana) at an 8- to 10-year follow-up; DEXA scanning was performed at 3 and 12 months on a second cohort of 40 patients. The mean Harris hip score was 94.2, and no revision was performed. Measurable subsidence of the stem was found in three (2.8%) patients; the subsidence was always measured within the first year of follow-up, and did not progress at the subsequent controls. Bone mineral density decreased at 1 year, 15.1% in zone 1, and 3.4% in zone 7. Uncemented stems with a taper design, which provide a high metaphyseal fit, lead to comparable and reproducible long-term results independently from other design characteristics.

Eight- to ten-year results of a variable geometry stem

GALLINARO, Paolo;MASSE', Alessandro;
2007

Abstract

This prospective study conducted on 108 consecutive implantations of a straight, cementless, taper-designed stem with variable lateral-flare (Pegasus, DePuy, Warsaw, Indiana) at an 8- to 10-year follow-up; DEXA scanning was performed at 3 and 12 months on a second cohort of 40 patients. The mean Harris hip score was 94.2, and no revision was performed. Measurable subsidence of the stem was found in three (2.8%) patients; the subsidence was always measured within the first year of follow-up, and did not progress at the subsequent controls. Bone mineral density decreased at 1 year, 15.1% in zone 1, and 3.4% in zone 7. Uncemented stems with a taper design, which provide a high metaphyseal fit, lead to comparable and reproducible long-term results independently from other design characteristics.
30
954
958
P. GALLINARO; A. MASSE'; F. LEONARDI; C.A. BURATTI; F. BOGGIO; R. PIANA
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2318/44354
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