Contemporary Dual Mobility Head Penetration at Five Years: Concern for the Additional Convex Bearing Surface?
dc.contributor.author | Deckard, Evan R. | |
dc.contributor.author | Azzam, Khalid A. | |
dc.contributor.author | Meneghini, R. Michael | |
dc.contributor.department | Orthopaedic Surgery, School of Medicine | en_US |
dc.date.accessioned | 2018-04-19T14:20:59Z | |
dc.date.available | 2018-04-19T14:20:59Z | |
dc.date.issued | 2018 | |
dc.description.abstract | Background Dual mobility (DM) bearings are increasingly popular and second-generation designs contain highly cross-linked polyethylene. The purpose of this study is to report head penetration rates in modern DM bearings. Methods A review of 63 consecutive DM bearings was performed. Radiographs were analyzed for head penetration using Martell methodology at regular postoperative intervals. Results Thirty-four DM bearings were analyzed. Mean linear head penetration was 1.59 mm/y at 1 year, 1.07 mm/y at 2 years, and 0.27 mm/y at 5 years following an exponential regression model (R2 = 0.999). Mean volumetric wear was 783 mm3/y at 1 year, 555 mm3/y at 2 years, and 104 mm3/y at 5 years following an exponential regression model (R2 = 0.986). Conclusion Initial head penetration of DM bearings is larger than contemporary cross-linked polyethylene bearings; however, rates approach steady state after 2 years, analogous to traditional bearings. The larger “bedding-in” head penetration may be due to the additional convex bearing surface, creating 2 surfaces for deformation/wear. | en_US |
dc.eprint.version | Author's manuscript | en_US |
dc.identifier.citation | Deckard, E. R., Azzam, K. A., & Meneghini, R. M. (2018). Contemporary Dual Mobility Head Penetration at Five Years: Concern for the Additional Convex Bearing Surface? The Journal of Arthroplasty. https://doi.org/10.1016/j.arth.2018.02.061 | en_US |
dc.identifier.uri | https://hdl.handle.net/1805/15867 | |
dc.language.iso | en | en_US |
dc.publisher | Elsevier | en_US |
dc.relation.isversionof | 10.1016/j.arth.2018.02.061 | en_US |
dc.relation.journal | The Journal of Arthroplasty | en_US |
dc.rights | Publisher Policy | en_US |
dc.source | Author | en_US |
dc.subject | dual mobility | en_US |
dc.subject | total hip arthroplasty | en_US |
dc.subject | bearing wear | en_US |
dc.title | Contemporary Dual Mobility Head Penetration at Five Years: Concern for the Additional Convex Bearing Surface? | en_US |
dc.type | Article | en_US |