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Accuracy and safety of in-house surgeon-designed three-dimensional-printed patient-specific implants for wafer-less Le Fort I osteotomy

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Abstract

Objectives

The design and fabrication of three-dimensional (3D)-printed patient-specific implants (PSIs) for orthognathic surgery are customarily outsourced to commercial companies. We propose a protocol of designing PSIs and surgical guides by orthognathic surgeons-in-charge instead for wafer-less Le Fort I osteotomy. The aim of this prospective study was to evaluate the accuracy and post-operative complications of PSIs that are designed in-house for Le Fort I osteotomy.

Materials and methods

The post-operative cone beam computer tomography (CBCT) model of the maxilla was superimposed to the virtual surgical planning to compare the discrepancies of pre-determined landmarks, lines, and principal axes between the two models. Twenty-five patients (12 males, 13 females) were included.

Results

The median linear deviations of the post-operative maxilla of the x, y, and z axes were 0.74 mm, 0.75 mm, and 0.72 mm, respectively. The deviations in the principal axes for pitch, yaw, and roll were 1.40°, 0.90°, and 0.60°, respectively. There were no post-operative complications related to the PSIs in the follow-up period.

Conclusions

The 3D-printed PSIs designed in-house for wafer-less Le Fort I osteotomy are accurate and safe.

Clinical relevance

Its clinical outcomes and accuracy are comparable to commercial PSIs for orthognathic surgery.

Trial registration

Clinical trial registration number: HKUCTR-2113. Date of registration: 29 July 2016.

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Funding

This study was supported by the Health and Medical Research Fund (Food and Health Bureau, The Government of Hong Kong Special Administrative Region). Grant no. No. 05161626.

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Authors and Affiliations

  1. Oral and Maxillofacial Surgery, Faculty of Dentistry, The University of Hong Kong, Hong Kong, Hong Kong

    Yiu Yan LEUNG, Jasper Ka Chai LEUNG, Alvin Tsz Choi LI, Nathan En Zuo TEO, Karen Pui Yan LEUNG, Shun Wai AU, Dion Tik Shun LI & Yu-Xiong SU

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  1. Yiu Yan LEUNG
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Correspondence to Yiu Yan LEUNG.

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Ethics approval was granted by the local institutional review board (HKU/HA HKW IRB UW16-315).

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LEUNG, Y.Y., LEUNG, J.K.C., LI, A.T.C. et al. Accuracy and safety of in-house surgeon-designed three-dimensional-printed patient-specific implants for wafer-less Le Fort I osteotomy. Clin Oral Invest 27, 705–713 (2023). https://doi.org/10.1007/s00784-022-04798-y

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