Clinical Data

Complaints, iFuse vs iFuse-3D (Cher - MDER 2018)

Postmarket Surveillance of 3D-printed Implants for Sacroiliac Joint Fusion

Cher D, Wroe K, Reckling WC, Yerby S.
Med Devices (Auckl). 2018 Sep 28;11:337-343.
DOI: 10.2147/MDER.S180958. PMCID: PMC6168000


Background: Government regulations require postmarket surveillance for cleared/approved medical devices. Trend analysis of newly marketed devices may help to confirm device-related safety or uncover other device or procedure-related problems.

Methods: Complaints related to the use of 3D-printed triangular titanium implants for sacroiliac joint (SIJ) fusion were compared with those of the prior machined version of the device manufactured with a titanium plasma spray (TPS) coating. Event rates were calculated either by dividing event counts by numbers of surgeries or, for late events, using Kaplan-Meier survival analysis.

Results: Three types of complaints with nontrial frequencies were identified. Issues in instruments occurred at a low and constant rate (1.3%). Using Kaplan-Meier analysis, pain-related complaints occurred at a low and similar rate in both groups (<0.5%). The 1-year cumulative probability of surgical revision was low in both the 3D and machined versions of the device (1.5% for machined and 1% for 3D printed, P=0.0408 for difference). No implant breakages or migrations were identified in either group, and overall rates were similar to a previously published report.

Conclusion: The 3D-printed version of triangular titanium implant was associated with complaint and adverse event rates similar to those for the prior machined version of the device.

KEYWORDS: adverse events; complaint analysis; permanent implants; postmarket surveillance; quality system; sacroiliac joint fusion

Author Information

Cher D – Clinical Affairs, SI-BONE, Inc., Santa Clara, CA, USA.

Wroe K – Quality Assurance, SI-BONE, Inc., Santa Clara, CA, USA.

Reckling WC – Medical Affairs, SI-BONE, Inc., Santa Clara, CA, USA.

Yerby SA – Research and Development, SI-BONE, Inc., Santa Clara, CA, USA.

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