Acetabular Revision Surgery with the Uncemented Oblong Bofor Cup - Early to Midterm Results

Abstract

This study shows that the BOFOR cup provided good clinical results and showed satisfactory stability at early to midterm follow-up.

Long-term results of isolated acetabular revisions with reinforcement rings: a 10- to 15-year follow-up

“…32 Potential advantages of isolated acetabular revisions such as shorter surgical time, less blood loss, and fewer complications in femoral revision have been widely discussed in the last decade. [6][7][8] Leaving in place a well-fixed femoral stem could lead to a difficult exposure of the acetabulum and a more complex restoration of hip geometry. This may result in cup malposition and subsequent increased risk of postoperative dislocation.…”

“…5 Isolated acetabular revision has several reported advantages such as lower operative time, reduced blood loss and lower costs. 6,7 Retaining a well-fixed stem preserves bone stock and reduces the risk of intraoperative fractures and femoral perforation. 8 On the other hand, in isolated acetabular revision more experience is needed in order to obtain adequate exposure of the acetabulum and proper restoration of hip geometry, especially when severe bone defects have to be managed.…”

“…9,10 Moreover, increased rates of postoperative dislocation have been reported. 6,8 Several methods have been developed for the management of mild and massive acetabular bone stock loss including large or jumbo hemispherical uncemented sockets together with morsellised bone grafts and screws, 6,11 oblong or bilobed cups, 7,12 massive bulk allografts, and metallic reinforcement rings and cages. [13][14][15][16] Recently, trabecular metal augments and cup-cage constructs have been employed in severe acetabular bone loss or pelvic discontinuity with good mid-term outcomes.…”

Reconstruction options and outcomes for acetabular bone loss in revision hip arthroplasty

“… 51 , 55-61 Three types of Oblong Cups have been described: the bilobed oblong acetabular component, the longitudinal oblong revision cup (LOR) and the BOFOR cup. 56 In a recent systematic review, Volpin et al , 11 reported good results for oblong cups in term of overall failure rate (5.9%, 12 of 203 hips) with an aseptic loosening rate of 3.9% (8 of 203 hips) and a dislocation rate of 2.4% (5 of 203 hips) at a mean follow-up of 7.6 years. These results are probably due to the ability of these cups to restore the hip center and achieve osseointegration through sufficient bone implant contact.…”

“…Oblong cups are indicated in large superior segmental bone defects with a prevalent superior migration and a longitudinal diameters that are greater than their transverse diameters (Paprosky Types IIA, IIB and IIIA). 55 , 56 Oblongs cups adapt better to large and oblong bone defects, that cannot be filled with hemispherical cups, avoiding marked reaming of the anterior and posterior columns. 51 , 55-61 Three types of Oblong Cups have been described: the bilobed oblong acetabular component, the longitudinal oblong revision cup (LOR) and the BOFOR cup.…”