Precision and Efficacy of Digital Technology in Orthognathic Surgery for Facial Asymmetry Correction: A Quantitative Analysis.

Objectives: To evaluate the efficacy of digital technology-assisted design in orthognathic surgery for patients with facial asymmetry.

Materials and methods: The study comprised 30 patients with facial asymmetry. Mimics software was used to digitally simulate surgical plans and create guide plates for orthognathic surgery. The midsagittal plane, Frankfurt horizontal plane, and coronal plane of the perosseous nasion point served as reference planes to evaluate three-dimensional consistency between preoperative simulation designs and postoperative three-dimensional cranial models, specifically examining bilateral maxillary and mandibular canine cusps and mesiobuccal cusps of first molars. Distance differences between bilateral corresponding landmarks on postoperative models and the three reference planes were measured, asymmetry rates calculated, and the distance from pogonion to midsagittal plane measured to evaluate facial hard tissue symmetry after surgery.

Results: No significant differences were observed between preoperative simulation designs and postoperative three-dimensional cranial models regarding the distances between bilateral corresponding landmarks and the three reference planes. Postoperatively, distance differences between bilateral corresponding landmarks and the three reference planes were ≤ 1 mm. Seventy-five percent of asymmetry rate indicators were less than 10%. The mean distance from pogonion to midsagittal plane was 1.82 ± 1.16 mm.

Conclusion: The application of digital technology in orthognathic surgery for patients with facial asymmetry enhances operative precision and ensures favorable treatment outcomes.

Clinical relevance: Digital technology in orthognathic surgical planning improves treatment effectiveness for patients with facial asymmetry.

Level of evidence iii: This journal requires that authors assign a level of evidence to each article. For a full description of these Evidence-Based Medicine ratings, please refer to the Table of Contents or the online Instructions to Authors www.springer.com/00266 .