[Problem]

To select a dental cement or a trial test material for easily obtaining high color tone adaptability to peripheral tooth substances, in mounting of or trial test of a prosthesis device

[Solution]

To provide a dental cement set consisting of a plurality of dental cements having color tones including color tones of 3 to n colors for selecting and using a dental cement from the plurality of dental cements having the color tones including the color tones of the 3 to n colors after trial test with trial test materials for the dental cement to be used from the plurality of dental cements having the color tones including the color tones of the 3 to n colors, wherein: the amount of information loss Pin with regard to first principal component determined by principal component analysis is less than 2, and . the dental cement set satisfies following Formula 1.

2((CL*.sub.p1CL*.sub.p).sup.2 +(Ca*.sub.p1Ca*.sub.p).sup.2 +(Cb*.sub.p1Cb*.sub.p).sup.2).sup.1/2<8 Formula 1

(wherein p is an arbitrary integer of 2pn)

A cosmetic tooth cover system includes one or a plurality of kits having a plurality of temporary tooth covers, each of which is configured to engage on and cover a viewable surface of a respective tooth in the mouth of a user. In a plurality of kits each may have a different color shade matchable to that of the teeth of the user, and each may have different sized sets of tooth covers to match the size of the user.

A cosmetic tooth cover system includes one or a plurality of kits having a plurality of temporary tooth covers, each of which is configured to engage on and cover a viewable surface of a respective tooth in the mouth of a user. In a plurality of kits each may have a different color shade matchable to that of the teeth of the user, and each may have different sized sets of tooth covers to match the size of the user.

An oral photography system and method can include: a chassis, the chassis including a chassis base and a vertical chassis extension, the vertical chassis extension extending upward from the chassis base, the vertical chassis extension including a device clamp having a tightening extension coupled to a top clasp and a bottom clasp, the top clasp and the bottom clasp configured to hold an imaging device perpendicular to the vertical chassis extension, a diffusion panel attachment coupled to the vertical chassis extension, and a light panel attachment coupled to the vertical chassis extension; a diffusion panel releasably affixed to the diffusion panel attachment; and a light panel releasably affixed to the light panel attachment.

The present disclosure relates to an LED lighting device for a mobile phone. The LED lighting device for a mobile phone includes a main body to which power is supplied, a fixing portion that is provided at a lower portion of the main body and is detachably coupled to a mobile phone, a lighting unit that is rotatably connected to a front of the main body and emits light when DC power is applied thereto, and a connection bar that connects the main body to the lighting unit.

A process for determining a tooth color of a filling or another restoration is provided which in particular is produced using composite materials, wherein at least one tooth is scanned or is visually detected. The process is characterized in that natural teeth are spectrally measured in advance, that the color values measured within a color space are classified into several, in particular four, categories which each form a color cloud extending in a three-dimensional fashion within the color space, which is done with the help of a structuring algorithm, in particular a Nearest Neighbour Algorithm, or a symmetry recognition algorithm, and that the tooth color of the filling is determined by means of evaluating to which category the tooth scanned has the smallest color distance, or to which color cloud the tooth scanned belongs.

A cover device formed of a plastic or similar composition is structured for removable attachment over a bracket of an orthodontic appliance and includes a main plate with an outer front face, and top and bottom claws integrally formed with the main plate, curling behind the main plate, and each terminating at distal ends in spaced, opposing relation to each other behind the main plate. The main plate is bowed outwardly from top to bottom to allow the claws to flex away from each other and snap over the bracket upon application of inward pressure on the front face while the claws are pressed against the bracket, to thereby attach the cover to the bracket, with the bracket concealed from view behind the cover device. The front face may include an ornamental design. In another embodiment, the cover device includes a bottom tab for cooperating engagement with a removal tool.

The present invention relates to a method for producing a dental prosthesis part (100), comprising the steps of determining a natural tooth color value with respect to a specified region (101) of the dental prosthesis part (100); and electronically converting the natural tooth color value into a color value of a coloring liquid (103) for coloring the region (101).

The invention concerns a process for the approach to an oriented relative position between a camera or scanning device and a dental assistance element (10), in particular via an app on a smartphone, for recording the dental assistance element (10), such as a miniature shade guide (10). A mark (4) is attached to the dental assistance element (10), and/or at least one part of the dental assistance element (10) is used as a mark (4). A stencil (6) which is congruent with or mathematically similar to the mark (4) is displayed on a display device of the camera or scanning device. For the approach to the oriented relative position between the camera or scanning device and the dental assistance element, a modification of the degree of coverage of the stencil (6) with the mark (4) or the one part of the dental assistance element (10) is detected.

An auxiliary color selection body (10) is provided for target objects (34) such as dental objects, having a base body. The base body (12) has at least two inner walls (16, 18, 20) which extend transversely, in particular at right angles to each other, from which inner walls the base body extends outwardly as far as to the outer walls (22).

The base body (12) extends in two dimensions between the inner walls and the outer walls, with color selection areas (30) and reference features (32) arranged on the auxiliary color selection body. The auxiliary color selection body can be arranged in the vicinity of a target object (34) such that a straight line passing through two target object proximity points (38, 40, 42) on the inner walls sweeps across the target object.