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- W1986989601 abstract "Cobalt-chrome modular distal ulnar head replacement arthroplasty is a surgical option to restore stability to the distal radioulnar joint rendered unstable by hemi-resection arthroplasty or a total resection arthroplasty. However, the revision of dislocated modular cobalt-chrome ulnar head implants may pose an important intraoperative challenge. The Morse-taper disassembly force of modular ulnar head implants is not available in the current published literature. We present a case in which tremendous difficulty was encountered while revising a dislocated modular cobalt-chrome distal ulnar head implant. The mean Morse-taper disassembly force of the retrieved modular cobalt-chrome implant was 2958 N ± 1272. At nearly 4.5 times the average body weight, the modular ulnar head Morse-taper disassembly strength presented a formidable force to overcome intraoperatively. Cobalt-chrome modular distal ulnar head replacement arthroplasty is a surgical option to restore stability to the distal radioulnar joint rendered unstable by hemi-resection arthroplasty or a total resection arthroplasty. However, the revision of dislocated modular cobalt-chrome ulnar head implants may pose an important intraoperative challenge. The Morse-taper disassembly force of modular ulnar head implants is not available in the current published literature. We present a case in which tremendous difficulty was encountered while revising a dislocated modular cobalt-chrome distal ulnar head implant. The mean Morse-taper disassembly force of the retrieved modular cobalt-chrome implant was 2958 N ± 1272. At nearly 4.5 times the average body weight, the modular ulnar head Morse-taper disassembly strength presented a formidable force to overcome intraoperatively. Distal Ulna Prosthesis: Issues Related to Uncoupling of the Ulnar HeadJournal of Hand SurgeryVol. 35Issue 5PreviewWe noted a recent scientific article in the Journal by Naidu and Rodin.1 In this report, the authors described replacement of the head of the ulna with a modular ulnar head implant for the purpose of restoring stability to the distal radioulnar joint. Despite 6 weeks in a supportive cast and further splinting, instability of the distal radioulnar joint resulted, which the authors attributed to “poor soft tissue envelope.” They returned the patient to the operating room 12 weeks after the original surgery. Full-Text PDF" @default.
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- W1986989601 date "2009-07-01" @default.
- W1986989601 modified "2023-09-26" @default.
- W1986989601 title "Modular Ulnar Head Decoupling Force: Case Report" @default.
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- W1986989601 doi "https://doi.org/10.1016/j.jhsa.2009.02.013" @default.
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