Man ModelTrimming/pt-br

Modelo Aparamento

A ferramenta de aparamento de modelo faz parte dos módulos adicionais Ortodontia e Moldagem. Ela pega uma ou duas arcadas alinhadas adquiridos do escaner e fecha a malhas da arcada com uma base aparada.

A ferramenta é lançada clicando no botão Template:Inline, nas Barra de Ferramentas Principal que aparece quando o projeto tem pelo menos uma malha de arcada pronta.

Interface

A interface da ferramenta de corte é diferente do resto do software. No canto superior direito, existem 4 guias, uma para cada etapa do processo. O resto da tela é feita por um ou três Vistas 3D:

• Uma Vista : durante a fase de corte das margens, ele mostra apenas uma arcada de cada vez
• Três Vistas : durante as outras etapas, eles mostram todas as informações juntas e permite ao usuário ver tudo a partir de três pontos de vista diferentes ao mesmo tempo

Passos

O procedimento é feito em 4 passos:

1. Move Jaws : adjusts the acquisition position of the jaws to respect some reference planes (occlusal plane and simmetric plane)
2. Cut Margins : draws a margin line on the mesh to cut away all the information that will be replaced by the trimmed base
3. Adjust Bases : changes the shape/position of the trimmed bases to adapt to the specific jaws to trim
4. Finalize : creates the finalized meshes, merging the cut jaws with the trimmed bases

Move Jaws

The positions of the jaw meshes, acquired from the scanner, are not always the same. This tool allows the user to adjust the position of the meshes with the aid of some commands.

For every movement there are 4 buttons (-10, -, +, +10), which apply a specific movement at the objects.

All the movements (rotations and translations) are defined according to an Axis. The axis can be seen in the 3D views, on the bottom-left angle.

There's an additional option, Show Bases, that allows the user to see a preview of where the trimmed bases will be, in order to aid the positioning process.

Cut Margins

The jaw meshes acquired from the scanner may have a part of the surfaces that is not part of the jaw but of the old base or support. This parts have to be removed before merging the data with the new trimmed base.

This page gives the user an interactive tool that can draw a line on the mesh surface:

1. The first left mouse click on the mesh surface creates a point and starts the margin definition
2. Any additional left mouse click adds a point to the margin and connects it to the previous one
3. A left mouse click on the first point closes the margin
4. After the margin is closed, the user can:
   • drag one point with the left mouse button to move it to a different position
   • click between two points, to add a new point in the middle
   • press ESC to delete the margin and start again

When the margin is defined, a click on the Cut button will cut away all the part of the mesh below the margin.

Adjust Bases

In this page the user can change 4 different parameters of the bases. When a parameter is changed, the 3D view is updated after 2 seconds.

• Width : the maximum width of the base
• Length : the maximum length of the base
• Height : the base height
• Distance : the bases are always positionated symmetric to the occlusal plane. This is the distance between the two bases

The jaw meshes, after the cut, have to be completely fitted in the bases. If the bases are too small a warning message will appear below the parameters.

Finalize

This last page has only one button: Finalize. When the button is clicked, the software takes all the data and computes the new, closed, mesh. This can take up to 2 minutes.

If the result is not good enough, the user can return to one of the previous steps and change some parameters and positions and then return to the Finalize step and compute the meshes again.

When the result after the Finalize button click is good, the user can click Ok to confirm the base trimming and save the new meshes.