A digital technique to adjust the disc-condyle relationship based on CBCT-MRI fused 3D images.

A digital workflow that can adjust the disc-condyle relationship rapidly and precisely is described. Cone beam computed tomography (CBCT), magnetic resonance imaging (MRI), and an intraoral scan at maximal intercuspal position are superimposed depending on the anatomic structure, and the disc-condyle relationship is adjusted on the fused display of the articular disc and condyle in the CBCT-MRI 3-dimensional spatial environment. An occlusal device is then directly designed and fabricated on the achieved maxillomandibular position, and the occlusal device is finely adjusted intraorally to improve function as needed.

A digital chairside repair protocol for removable partial dentures with polyetheretherketone frameworks.

Polyetheretherketone (PEEK) has become popular for removable partial denture (RPD) frameworks but reports on their clinical follow-up and repair are lacking. Two defective PEEK-framework RPDs were repaired with computer-aided design and manufacturing technology, saving costs and time and simplifying the treatment process.

Effects of loupes and microscopes on a dental technician's working posture from ergonomic aspects.

Objectives: This work aimed to study the effects of loupes and microscopes on a dental technician's working posture during practical operation from ergonomic aspects. The technician's working postures under the conditions of the naked eye, loupes, and microscopes were compared. The practical value of loupes and microscopes was assessed based on the evaluation index of working posture from ergonomic aspects.

Application of polymeric porcelain color-masking cast posts in the aesthetic repair of anterior teeth: a case report.

Many patients with large-area tooth defect need cast post-core crown restoration. However, the color defect of the cast post-core will affect the final restorative result, especially that of the anterior teeth. A new technology of color masking by applying CERAMAGE polymeric porcelain to the cast metal post-core surface improves the color of a full-ceramic restoration of anterior teeth and may provide a new alternative for the aesthetic repair of anterior teeth with a large area of defective tooth.

Theoretical investigation on the structural and thermodynamic properties of FeSe at high pressure and high temperature.

A theoretical investigation on structural and thermodynamic properties of 11-type iron-based superconductor FeSe at high pressure and high temperature was performed by employing the first-principles method based on the density functional theory. Some structural parameters of FeSe in both tetragonal and hexagonal phases are reported. According to the fourth-order Birch-Murnaghan equation of states, the transition pressure P(t) of FeSe from the PbO-type phase to the NiAs-type phase was determined.