Comparison of Modular Neck Stem and Nonmodular Neck Stem in Primary Total Hip Arthroplasty: Findings of a Meta-Analysis

Modular neck stem in total hip arthroplasty (THA) can offer variable option to reconstruct hip anatomy. However, concerns have been raised about the higher risk of revision of modular neck stem due to corrosion recently. We conducted this meta-analysis to supply a quantitative evaluation regarding this issue.We systematically searched PubMed, the Cochrane Library, EMBASE, Web of Science, Scopus, EBSCO from inception to January 2021. The trials comparing the survivorship and complications between modular-neck THA and nonmodular-neck THA were involved in the analysis.6 studies with 820523 participants were included. The outcomes of meta-analysis revealed that there were no significant differences between modular neck stem and nonmodular neck stem in revision rate (RR, 1.43; 95% CI, 0.99 to 2.04; P<0.00001), dislocation rate (RR, 1.38; 95% CI, 0.3 to 2.36; P<0.0001) and infection rate (RR, 1.12; 95% CI, 0.94 to 1.34; P=0.59).The utility of modular neck stem in THA offers similar survivorship compared to nonmodular neck stem. Current study demonstrated that utilization of modular neck stem is a reasonable choice in primary THA.