47559

Conventional versus computer-assisted techniques forreconstruction of orbitozygomaticfractures

Thesis

Last updated: 05 Jan 2025

Subjects

-

Tags

Oral & Maxillofacial Surgery

Authors

Nassar, Yasmin Ahmad

Accessioned

2018-08-26 05:48:02

Available

2018-08-26 05:48:02

type

M.D. Thesis

Abstract

Objectives: The aim of this study was to compare the conventional (free-hand) technique to the computer-assisted technique in reconstructing orbitozygomatic complex fractures.Patients and methods: Ten patients with unilaterally displaced orbitozygomatic complex and indicated for internal orbital reconstruction were included and divided into 2 equal groups:-Group 1: Received a computer-assisted reconstruction.Group 2: Received a conventional “free-hand” reconstruction.For both groups pre- and postoperative high resolution CT scans were performed. In group 1 the preoperative CT scan was used in association with surgical planning using specialized software and stereolithography were used for the production of corrected orbital models and zygomatic templates. Titanium meshes were bent onto the models preoperatively, while the templates were used intraoperatively for guidance of zygomatic reduction into the pre-planned position. In group 2 bending of the titanium meshes was carried out intraoperatively and “free-hand” reduction of the zygomatic complex was accomplished. Pre- and postoperative CT based volumetric assessment of the intact, traumatized and reconstructed orbits were executed. In addition, CT based linear measurement of the degree of enophthalmous was done pre- and postoperatively.Results: Results showed that both techniques lead to a statistically significant decrease in orbital volume following orbitozygomatic reconstruction. Though, there was no statistically significant difference between the accuracy of both techniques in posttraumatic reconstruction of orbitozygomatic complexes. Results also revealed a statistically insignificant decrease in the degree of enophthalmous with no statistically significant difference among both groups.Conclusion: Both reconstruction techniques result in significant correction of the orbital volume, though the improvement in the globe projection was not significant. Computer-assisted reconstruction could be helpful in cases with massive internal orbital disruption and in delayed cases when some degree of bone resorption hinders anatomical reduction.

Issued

1 Jan 2012

DOI

http://dx.doi.org/10.21473/iknito-space/39970

Details

Type

Thesis

Created At

28 Jan 2023