Impact of post-orthodontic dental occlusion on masticatory performance and chewing efficiency.

Background: Whether precise orthodontic detailing of occlusion impacts masticatory function is unknown. In this study, we aimed to assess the impact of post-orthodontic dental occlusion on masticatory performance and chewing efficiency.

Materials And Methods: Fifty-four adults who completed orthodontic treatment were categorized into two groups using the American Board of Orthodontics (ABO) model grading system: one meeting ABO standards (ABO, N = 29), the other failing to meet them (non-ABO, N = 25).

Correlation between three-dimensional morphological changes of the hyoid bone with other skeletal maturation methods in adolescents.

Objective: The study compares growth changes of hyoid bone in cone-beam computed tomography (CBCT) with conventional skeletal maturation methods to examine their potential implications in the development of a three-dimensional method.

Study Design: Subjects (n = 62, 11-17 years of age) were exposed to CBCT at a six-month interval (T1/T2/T3). Ten-hyoid distances were compared with age, hand wrist skeletal maturation index (SMI), and cervical vertebral maturation stage (CS).

Assessment of skeletal maturation based on cervical vertebrae in CBCT.

Diagnosis of skeletal age in adolescents helps orthodontists select and time treatments. Currently this is done using lateral cephalometric radiographs. This study evaluates the application of the conventional method in cone-beam computer tomographic (CBCT) images to bring forth assessment of skeletal maturation in three-dimensions.

Calibration and applications of the ΔMP2 method for calculating core electron binding energies.

We calibrated a method for the evaluation of core electron binding energies, based on the energy differences between the cation and neutral molecule evaluated at the level of Møller-Plesset perturbation theory. The central feature of the method is the use of a mixed basis set: a large all-electron basis set is used for the atom whose core electron is removed, while the model core potential basis set is employed for all remaining atoms. Calibration was carried out for 55 molecules and 114 binding energies of 1s core electrons for the atoms C, N, O, and F.