Comparison of Early Fatigue Failure of the TFNa and Gamma 3 Cephalomedullary Nails in the United States From 2015 to 2019.

Abstract:

OBJECTIVES:To compare reports of implant fatigue failure submitted to the FDA of 2 commonly used cephalomedullary nails. METHODS:In total, 2724 medical device reports from the FDA's MAUDE database from Jan 2015 to Oct 2019 were reviewed for the Trochanteric Femoral Nail-Advanced (TFNa) and Gamma 3 implants. RESULTS:Data from 342 implant failures included in the MAUDE database were analyzed. TFNa and Gamma 3 had 183 and 159 reported fatigue failures, respectively. All failed implants fractured in the same location through the proximal screw aperture. Time from implantation to failure was on average 2 months shorter for TFNa implants that were reported fractured than for Gamma 3 implants reported, a difference that was statistically significant (P < 0.05). In total, 100 implants were reported to have failed within the first 4 months (53 and 47 for TFNa and Gamma 3, respectively). For Gamma 3 implants that failed in the first 4 months, almost all of the available manufacturers' inspection reports revealed implant notches at the point of failure from drilling. For TFNa implants that failed early, only one reported notch was noted in the available inspection reports. CONCLUSIONS:In contrast to other studies regarding fatigue failure, reported failures in both TFNa and Gamma 3 occurred earlier than can be attributed to delayed or nonunion. The reported failures of the TFNa in the MAUDE database occurred earlier than did those of the Gamma 3. Early failures of the Gamma 3 seemed to be the result of iatrogenic implant notching. LEVEL OF EVIDENCE:Therapeutic Level III. See instructions for authors for a complete description of levels of evidence.

journal_name

J Orthop Trauma

authors

Klima ML

doi

10.1097/BOT.0000000000001864

subject

Has Abstract

pub_date

2021-02-01 00:00:00

pages

e39-e44

issue

2

eissn

0890-5339

issn

1531-2291

pii

00005131-202102000-00012

journal_volume

35

pub_type

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