Media Co., Ltd.

Gifu University

Other

Hironobu Tsuji

Tatsuro Hayashi

Yosuke Tsuji

Akitoshi Katsumata

Hiroshi Fujita

Takeshi Hara

Chisako Muramatsu

Kazuki Horiba

Shinya Saito

Kaoru Kobayashi

Kazuhumi Suzuki

Shinji Shimoda

Toshihisa Fujiwara

Vladimir Volevich

Provided is an apparatus for measuring the thickness, roughness, and morphology index of the mandibular cortical bone using a dental panorama image to assist in the diagnosis of osteoporosis, wherein the thickness, roughness, and morphological index of the cortical bone is measured more accurately and the diagnosis of osteoporosis can be supported more accurately. An osteoporosis diagnostic support apparatus, wherein the apparatus has a contour extraction unit adapted to extract a mandibular contour from an image of a mandibular cortical bone photographed by a photographic apparatus adapted to photograph the mandibular cortical bone and surroundings thereof, a line segment extraction unit adapted to extract line segments from the image of the mandibular cortical bone photographed by the photographic apparatus; and a cortical bone thickness calculation unit adapted to calculate a thickness of the cortical bone based on the extracted mandibular contour and line segments.

Osteoporosis diagnostic support apparatus

Provided are: a device () and a system () for quantitatively calculating bone density by using an X-ray image of a bone pail, in particular, an alveolar bone; and an imaging assisting tool () for accurately and easily performing X-ray imaging of an alveolar bone. This bone density measurement device () comprises: an image display unit () for displaying X-ray images for an imaged bone part and a reference body on the same screen; a reference body density measurement unit () for measuring the density of the displayed X-ray image for the reference body; a bone part density measurement unit () for measuring the density of the displayed X-ray image for the bone part; and a bone density calculation unit () for calculating the hone density of the bone part by comparing the density of the X-ray image for the bone part with the density of the X-ray image for the reference body.

Bone density measurement device, bone density measurement system, and imaging assisting tool

The method for periodontal disease measurement of the present invention includes: using a plurality of cross-sectional images provided by x-ray CT images of teeth and periodontal tissues to detect a contour of each tooth in each cross-sectional image, detect a dentition, and provide a dental formula; detecting the positions of the root apex, the alveolar crest, and the crown of each tooth from the detected tooth contour data; calculating at least one of a distance indicator, a volume indicator, a surface area indicator, a first moment indicator, a center-of-gravity indicator, and an alveolar bone indicator from the detected tooth contour data, and the position data of the root apex, the alveolar crest, and the crown of the tooth; and measuring the progression of periodontal disease based on at least one calculated indicator.

Method for periodontal disease measurement

A periodontal disease testing apparatus of the present invention includes: an X-ray CT scanner photographing a portion including a tooth, a gingiva, and alveolar bone within an oral cavity to generate volume data of the portion; region setting means setting a related region of a subject tooth based on the volume data; defining means defining a principal axis of the subject tooth; correcting means correcting the related region so as to align the principal axis of the subject tooth with a normal direction of a cross-section of an X-ray CT image; multi-planar reconstruction image generating means generating a multi-planar reconstruction image of the corrected related region; means for generating developed image and the like transforming a coordinate of the related region to generate a developed image and a rotated image; and navigating means indicating correspondences of a spatial coordinate among the multi-planar reconstruction image, the developed image, and the rotated image.

Periodontal disease testing apparatus and image processing program used therein

In a test for supporting diagnosis of periodontal disease, a test method, whose measurement result has reproducibility and can be an objective index, is achieved and the loss of a tooth is predicted by use of the obtained objective index. A periodontal disease diagnosis supporting device supports diagnosis of periodontal disease by use of a captured three-dimensional image of a tooth part. The device includes a tooth root adhesion degree measuring part for measuring a degree of adhesion between a tooth root and alveolar bone by use of the image. The device further includes a periodontal disease diagnosis supporting part for supporting diagnosis of periodontal disease by use of a measurement result of the measuring part.

Periodontal disease diagnosis supporting device, periodontal disease diagnosis supporting system, periodontal disease diagnosis supporting program, and periodontal disease diagnosis supporting method

The present invention provides a teeth mark impression recording member, the teeth mark impression recording member may improve a measuring accuracy of an ideal diffusion-type laser light system and has excellent properties in fixing the member into the abutment teeth and includes a fixing part for fixing and sticking the member into abutment teeth, and an impression recording part for recording an impression of the opposing teeth, and at least the impression recording part includes reflection modifier as an additive.

Growing community of inventors

Tokyo, Japan

Hironobu Tsuji