Comparison of postoperative skeletal stability of maxillary segments after Le Fort I osteotomy, using patient-specific implant versus mini-plate fixation.

Affiliation

Department of Oral and Maxillofacial Diseases, Head and Neck Center, Helsinki University Hospital, Finland; Orthodontics, Department of Oral and Maxillofacial Diseases, Clinicum, Faculty of Medicine, University of Helsinki, Finland. Electronic address: [Email]

Abstract

BACKGROUND : Three-dimensionally (3D) designed osteotomies and customised osteosynthesis are rapidly becoming standard in maxillofacial reconstructive and deformity surgery. Patient-specific implants (PSIs) have been in use for a few years in orthognathic surgery as well. In Le Fort I osteotomy, wafer-free fixation of the maxillary segment can be performed by individually manufactured cutting and drill guides together with PSIs.
OBJECTIVE : This retrospective study was performed to compare the postoperative skeletal stability of the maxillary segment fixed by patient-specific implants versus mini-plates after Le Fort I osteotomy.
METHODS : Fifty-one patients were divided into subgroups according to the fixation method and the advancement of the sub-spinal point. The postoperative skeletal stability of the maxillary segment was evaluated from lateral cephalometric radiographs one year postoperatively.
RESULTS : No statistically significant differences were found between the postoperative skeletal stability of the PSI and mini-plate fixed maxillae. Prospective studies, possibly with 3D fusion analysis, are warranted to confirm the results.
CONCLUSIONS : The choice between the two fixation methods does not seem to affect the postoperative skeletal stability of the maxillary segments.

Keywords

3D,Le Fort I osteotomy,Orthognathic surgery,Patient-specific implant,Relapse,Stability,