[Guided correction of maxillo-mandibular asymmetries, precision and long-term stability: Use of 3D digital planning combined with custom guides].

OBJECTIVE To evaluate the accuracy and long-term stability of guided surgical correction of maxillo-mandibular asymmetry using 3D virtual planning combined with patient-specific guides.

MATERIALS AND METHODS A single-center retrospective study was conducted on ten female patients with maxillomandibular facial asymmetry, treated between 2019 and 2023 with a protocol combining orthodontic preparation, 3D surgical planning, and guided bimaxillary surgery. Accuracy was assessed by comparing one-year postoperative outcomes with the virtual plan, using seven standardized anatomical landmarks. Clinical and radiological follow-up was performed for five years.

RESULTS The mean deviation between virtual planning and postoperative outcomes was 0.79mm for the maxilla and 1.33mm for the mandible. No recurrence was observed after five years. The technique reduced intraoperative adjustments and optimized postoperative occlusal stability.

CONCLUSION 3D virtual planning combined with patient-specific guides is a reliable and accurate approach for the correction of complex facial asymmetries, providing stable long-term outcomes with reduced morbidity. Multicenter studies with longer follow-up are warranted to confirm these findings.