TY - JOUR
T1 - Randomised trial comparing bone remodelling around two uncemented stems using modified Gruen zones
AU - ten Broeke, Rene H. M.
AU - Hendrickx, Roel P. M.
AU - Leffers, Pieter
AU - Jutten, Liesbeth M. C.
AU - Geesink, Rudolph G. T.
PY - 2012
Y1 - 2012
N2 - For assessment of bone remodelling around total hip arthroplasty using dual-emission X-ray absorptiometry (DEXA), a variety of different systems to identify regions of interest (ROI) have been used, making comparisons between stem designs difficult. The Gruen zones are now widely used for this purpose. We present the results of a randomised clinical trial comparing 2 uncemented stem designs with proximal coating, using a modification of the Gruen zones to allow improved representation of the effect of the implant on bone mineral density (BMD) over time. DEXA-data were used in a randomised trial with 2 years follow up, comparing the uncemented Symax (TM) (n=25) and Omnifit (R) (n=24) stems. The effect on BMD was determined using the 'standard' adapted Gruen zones, and a modification which studied an equal length and position for zones 1 and 7 around both stems, assuring that the same regions in terms of cancellous and cortical bone were compared. The 'modified' regions of interest give lower BMD values around the Omnifit (R) than using the 'standard' Gruen zones (3.6 % in zone 7, p
AB - For assessment of bone remodelling around total hip arthroplasty using dual-emission X-ray absorptiometry (DEXA), a variety of different systems to identify regions of interest (ROI) have been used, making comparisons between stem designs difficult. The Gruen zones are now widely used for this purpose. We present the results of a randomised clinical trial comparing 2 uncemented stem designs with proximal coating, using a modification of the Gruen zones to allow improved representation of the effect of the implant on bone mineral density (BMD) over time. DEXA-data were used in a randomised trial with 2 years follow up, comparing the uncemented Symax (TM) (n=25) and Omnifit (R) (n=24) stems. The effect on BMD was determined using the 'standard' adapted Gruen zones, and a modification which studied an equal length and position for zones 1 and 7 around both stems, assuring that the same regions in terms of cancellous and cortical bone were compared. The 'modified' regions of interest give lower BMD values around the Omnifit (R) than using the 'standard' Gruen zones (3.6 % in zone 7, p
KW - Total hip arthroplasty
KW - DEXA scan
KW - Regions of interest
U2 - 10.5301/HIP.2012.9103
DO - 10.5301/HIP.2012.9103
M3 - Article
C2 - 22383318
SN - 1120-7000
VL - 22
SP - 41
EP - 49
JO - Hip International
JF - Hip International
IS - 1
ER -