Clinical Application to Improve the "Depth Perception Problem" by Combining Augmented Reality and a 3D Printing Model.

Unlabelled: In our experience with intraoperative evaluation and educational application of augmented reality technology, an illusion of depth has been a major problem. To improve this depth perception problem, we conducted two experiments combining various three-dimensional models and holograms and the observation angles using an augmented reality device.

Methods: In experiment 1, when observing holograms projected on the surface layer of the model (bone model) or holograms projected on a layer deeper than the model (body surface model), the observer's first impression regarding which model made it easier to understand positional relationships was investigated.

Clinical Applications of Meshed Multilayered Anatomical Models by Low-Cost Three-Dimensional Printer.

In recent years, even low-cost fused deposition modeling-type three-dimensional printers can be used to create a three-dimensional model with few errors. The authors devised a method to create a three-dimensional multilayered anatomical model at a lower cost and more easily than with established methods, by using a meshlike structure as the surface layer. Fused deposition modeling-type three-dimensional printers were used, with opaque polylactide filament for material.

Simulation Surgery Using 3D 3-layer Models for Congenital Anomaly.

Unlabelled: We made realistic, three-dimensional, computer-assisted 3-layered elastic models of the face. The surface layer is made of polyurethane, the intermediate layer is silicone, and the deep layer is salt, representing the skin, subcutaneous tissue, and the bone. We have applied these 3-layer models to congenital anomaly cases and have understood that these models have a lot of advantages for simulation surgery.

Intraoperative 3-dimensional Projection of Blood Vessels on Body Surface Using an Augmented Reality System.

Preoperative understanding of the running pattern of blood vessels is an important factor to approach surgical fields safely. In 2 cases where the vascular abnormalities were estimated, we projected the blood vessels onto the surgical field using an augmented reality device HoloLens. A splint was made to allow the patient to be fixed while undergoing computed tomographic angiography.

17-year Follow-up after Mandibular Distraction Performed in an Infant with Robin Sequence.

Robin sequence is a congenital anomaly, first described by Pierre Robin as a triad of micrognathia, upper airway obstruction and glossoptosis. The most significant airway management technique is the use of distraction osteogenesis to advance the mandible. On the other hand, late complications such as permanent dentition loss and malformation of the damaged teeth have been reported.

Functional Temporomandibular Joint Reconstruction in Costochondral Grafting of Micrognathia.

Rib bone and costochondral complex grafting has been used to treat micrognathia classified as Pruzansky type III. To acquire more physiological joint movement, we reconstructed a temporomandibular joint with the glenoid fossa in addition to the mandibular ramus. The patient underwent a tracheostomy to correct her airway obstruction at 2 months of age.

Physicochemical characteristics of carbonaceous adsorbent for dioxin-like polychlorinated biphenyl adsorption.

It has been known that dioxin-like polychlorinated biphenyls (DL-PCBs) are present in almost all types of environments worldwide. Activated carbon treatment has been expected for the removal of DL-PCBs because it is a simple and low-cost removal technology. In the present study, the physicochemical properties of activated carbon were investigated to identify the characteristics of 16 different types of activated carbon on adsorption properties for DL-PCBs.