Abstract: A system stores clustering information obtained by clustering multiple sets of viewpoints relative to teeth of a three-dimensional model of a patient and projection images of a head including the teeth from the respective viewpoints. At the time of a surgery, the system creates comparative images from a photographed image taken by a monocular camera and searches for any viewpoint having a projection image similar to the comparative image sequentially from a first hierarchy to a final hierarchy in the clustering information. The system sets a representative viewpoint based on the viewpoint of the final hierarchy, restores position and posture of the teeth of the patient relative to the monocular camera as position and posture of the teeth of the three-dimensional model relative to the representative viewpoint, and generates and outputs a navigation image based on position and posture of surgical information relative to the teeth after the restoration.

Abstract: A system stores clustering information obtained by clustering multiple sets of viewpoints relative to teeth of a three-dimensional model of a patient and projection images of a head including the teeth from the respective viewpoints. At the time of a surgery, the system creates comparative images from a photographed image taken by a monocular camera and searches for any viewpoint having a projection image similar to the comparative image sequentially from a first hierarchy to a final hierarchy in the clustering information. The system sets a representative viewpoint based on the viewpoint of the final hierarchy, restores position and posture of the teeth of the patient relative to the monocular camera as position and posture of the teeth of the three-dimensional model relative to the representative viewpoint, and generates and outputs a navigation image based on position and posture of surgical information relative to the teeth after the restoration.

Abstract: A method, according to an embodiment, for evaluating a regenerated cartilage includes allowing a group of cells containing auricular chondrocytes to stand in the presence of a culture medium, subsequently collecting at least a portion of a liquid component from the culture medium, measuring the GFAP content of the collected liquid component, and determining whether a regenerated cartilage that has been obtained or can be obtained from the group of cells is suitable for transplantation based on the GFAP content.

Abstract: A method, according to an embodiment, for evaluating a regenerated cartilage includes allowing a group of cells containing auricular chondrocytes to stand in the presence of a culture medium, subsequently collecting at least a portion of a liquid component from the culture medium, measuring the GFAP content of the collected liquid component, and determining whether a regenerated cartilage that has been obtained or can be obtained from the group of cells is suitable for transplantation based on the GFAP content.

Abstract: The object of the invention is to provide a redifferention medium and a redifferention method for making dedifferentiated chondrocyte to be redifferentiated into original chondrocyte, the dedifferentiated chondrocyte having attenuated cartilage characteristics due to dedifferentiation during in vitro culture. Accordingly, the invention provides a redifferention medium which is used for redifferentiating the dedifferentiated chondrocyte into the original chondrocyte, and contains insulin and at least one selected from BMP-2 and analogues thereof. The invention also provides a method for redifferentiating the dedifferentiated chondrocyte into the chondrocyte by culturing the dedifferentiated chondrocyte using the redifferentiation medium. The redifferentiation medium preferably further contains T3.