Roentgen stereophotogrammetric analysis and clinical assessment of unipolar versus bipolar hemiarthroplasty for subcapital femur fracture: a randomized prospective study

Abstract

This study suggests that while the bipolar prosthesis performs slightly better than the unipolar in terms of acetabular cartilage wear and clinical outcomes, it remains debatable whether the benefits are worth the increased cost of the prosthesis.

Meta-analysis of randomised controlled trials comparing unipolar with bipolar hemiarthroplasty for displaced femoral-neck fractures

“…Our search strategy found 107 articles; nine studies [9][10][11][12][13][14][15][16][17] involving 1,100 patients met inclusion criteria (Fig. 1).…”

“…Table 2 summarises study methodological quality and characteristics. All nine studies were randomised, and six [9][10][11][12][13]16] had adequate randomisation procedures; Seven had concealed allocation, and two [16,17] did not. Six studies used blinding, and three [9,15,17] did not.…”

“…Second, seven RCTs were identified in their study, two of which were only reported as a conference abstract with no data; eventually, only five were included for the final analysis. Therefore, that report should be updated, as a number of new, well-designed RCTs [13][14][15][16] have since been published. Compared with the Cochrane report, we included four other studies [13][14][15][16] and excluded that reported no data.…”

“…Mortality data were provided in four studies [9,[11][12][13]. The number of events was 41 for bipolar (n=318) and 38 for unipolar (n=294) HA.…”

“…Numerous studies [9][10][11][12][13][14][15][16][17] have compared clinical results of bipolar with unipolar HA. In a long-term follow-up trial comparing bipolar with unipolar prostheses, LaBelle et al [7] found there was less pain and decreased acetabular protrusion in the bipolar group.…”