Cartesian three-dimensional method to quantify displacements between cone beam computed tomography models.

Introduction: Research in Orthodontics and Oral Surgery has been relying on three-dimensional (3D) models to evaluate treatment results with displacement color map techniques, even though it has important limitations.

Objectives: This study proposed a method of tracking translational movements of 3D objects to evaluate displacements in surfaces with no shape modification.

Methods: Cone Beam Computed Tomography (CBCT) data of ten patients were imported to the Dolphin software.

The influence of the model superimposition method on the assessment of accuracy and predictability of setup models.

Introduction: The aim of this study was to evaluate the influence of different superimposition methods on the accuracy and predictability of conventional and virtual diagnostic setups.

Materials And Methods: Ten finished cases were used to make a conventional setup and a virtual setup. Second molars were not moved in the two setup situations to allow a reference for superimposition.

Orthodontic-surgical treatment for a patient with Class II malocclusion and inadequate maxillary incisor inclination.

Dental health and patient satisfaction at the end of orthodontic treatment are needed if the treatment is to be considered successful. This case report highlights the importance of proper diagnosis for a patient initially treated with camouflage, despite the indications for surgery. A 16-year-old male patient sought treatment complaining about his appearance.

Superimposition of 3D cone-beam CT models in orthognathic surgery.

INTRODUCTION: Limitations of 2D quantitative and qualitative evaluation of surgical displacements can be overcome by CBCT and three-dimensional imaging tools. OBJECTIVES: The method described in this study allows the assessment of changes in the condyles, rami, chin, maxilla and dentition by the comparison of CBCT scans before and after orthognathic surgery. METHODS: 3D models are built and superimposed through a fully automated voxel-wise method using the pre-surgery cranial base as reference.

Assessment of mandibular advancement surgery with 3D CBCT models superimposition.

OBJECTIVES: To assess surgery and short-term post-surgery changes in the position of the condyles, rami and chin after mandibular advancement. METHODOLOGY: Pre-surgery (T1), 1 week post-surgery (T2), and 6 week post-surgery (T3) CBCT scans were acquired for 20 retrognathic patients with short or normal face height. 3D models were built and superimposed through a fully automated voxel-wise method using the cranial base of the pre-surgery scan as reference.