Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Accuracy of Patient-Specific Implants in Virtually Planned Segmental Le Fort I Osteotomies

Reinald Kuehle
* ORCID logo ,
Mats Scheurer
,
Frederic Bouffleur
,
Jennifer Fuchs
,
Michael Engel
,
Jürgen Hoffmann
ORCID logo ,
Christian Freudlsperger
Version 1 : Received: 11 August 2023 / Approved: 14 August 2023 / Online: 14 August 2023 (10:18:08 CEST)

A peer-reviewed article of this Preprint also exists.

Kuehle, R.; Scheurer, M.; Bouffleur, F.; Fuchs, J.; Engel, M.; Hoffmann, J.; Freudlsperger, C. Accuracy of Patient-Specific Implants in Virtually Planned Segmental Le Fort I Osteotomies. J. Clin. Med. 2023, 12, 6038. Kuehle, R.; Scheurer, M.; Bouffleur, F.; Fuchs, J.; Engel, M.; Hoffmann, J.; Freudlsperger, C. Accuracy of Patient-Specific Implants in Virtually Planned Segmental Le Fort I Osteotomies. J. Clin. Med. 2023, 12, 6038.

Abstract

(1) Background: In orthognathic surgery, segmental Le Fort I osteotomies are a valuable method to correct maxillary deformities or transversal discrepancies. However, these procedures are technically challenging, and osteosynthesis can be prone to error. (2) Methods: In this retrospective, monocentric cohort study, patients were enrolled who underwent a virtually planned segmental maxillary osteotomy during their combined treatment. Positioning and osteosynthesis were achieved by either a 3D-printed splint and conventional mini plates or Patient-Specific Implants (PSI). The preoperative CT data, virtual planning data, and postoperative CBCT data were segmented. The deviation of all segments from the desired virtually planned position was measured using the analysis function of the IPS Case Designer. (3) Results: 28 Patients in the PSI Group and 22 in the conventional groups could be included. The PSI group showed significantly lower deviation from the planned position anteroposteriorly (-0.63±1.62mm vs. -1.3±2.54mm) and craniocaudally (-1.39±1.59mm vs. -2.7±3.1mm). For rotational deviations, the Pitch (0.64±2.59° vs. 2.91±4.08°) as well as the inward rotation of the lateral segments was positively influenced by PSI. (4). Conclusions: The presented data show that patient-specific osteosynthesis significantly reduces deviations from the preoperative plan in virtually planned cases. Especially transversal expansions and vertical positioning can be addressed better.

Keywords

orthognathic surgery; Le-Fort I osteotomy; segmental osteotomy; cohort studies; Spiral Cone-Beam Computed Tomography; maxilla; osteotomy

Subject

Medicine and Pharmacology, Dentistry and Oral Surgery

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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