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A five-year review of the OMX temporomandibular prosthetic total joint replacement system

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Abstract

Purpose

The aim of this study was to undertake a 5-year review of the OMX temporomandibular prosthetic total joint replacement system (OMX-TMJ).

Methods

Data was collected from patients who had an OMX-TMJ implanted between May 2015 and November 2020 at Epworth-Freemasons and St. Vincent’s hospitals in Melbourne, Australia. The data points included patient demographics, primary diagnosis, and clinical outcomes in terms of visual analogue scale (VAS) for pain, maximum inter-incisal mouth opening, and complication events.

Results

There were 206 OMX-TMJ devices implanted in 151 patients over the 5-year study period. The vast majority were female patients (n = 137, 90.7%) with a mean age of 44.8 years (range 20–76 years) at the time of surgery. Most patients presented with primary (idiopathic) osteoarthritis (119 joints—57.8%) that failed to respond to conservative measures. Based on a mean follow-up period of 36 months (range 12 months to 73 months), the average mouth opening improved from 30.8 mm pre-surgery to an average of 39.1 mm following OMX-TMJ surgery (p < 0.05). Joint pain (VAS: 0–10) significantly improved from 6.14 pre-surgery to 0.87 following OMX-TMJ surgery (p < 0.001). Twenty-one patients (13.9%) experienced device-related complications which resulted in explantation of 7 (3.4%) OMX-TMJ devices over the 5-year period.

Conclusion

This study shows that the OMX-TMJ prosthetic total joint replacement system is a reasonably safe, versatile, and reliable implant that effectively improves mandibular opening and reduces joint pain across a broad range of end-stage TMJ disorders.

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Authors and Affiliations

  1. Oral and Maxillofacial Surgery, Ground Floor, Epworth-Freemasons Hospital, Suite 1, 124 Grey Street, East Melbourne, VIC, 3002, Australia

    Gary Brierly, Aaron Thomas & George Dimitroulis

Authors
  1. Gary Brierly
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  2. Aaron Thomas
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  3. George Dimitroulis
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Corresponding author

Correspondence to George Dimitroulis.

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Ethics approval

Epworth Hospital Melbourne—EH2020-576.

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Not required, data collection de-identified.

Conflicts of interest

The senior author (GD) holds shares in MAXONIQ, the company that manufactures the device discussed in this article.

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Brierly, G., Thomas, A. & Dimitroulis, G. A five-year review of the OMX temporomandibular prosthetic total joint replacement system. Oral Maxillofac Surg 27, 131–139 (2023). https://doi.org/10.1007/s10006-021-01032-z

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  • DOI: https://doi.org/10.1007/s10006-021-01032-z

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