Model Trimming

模型底座修剪

模型修整工具是正畸與印模附加模塊的一部分.它需要從掃描儀獲得的一或兩個對準的顎與封閉顎嚙合修剪底座。

該工具啟動通過點擊 鈕, 在 主工具列 ,出現在專案至少有一個顎網格做好準備

界面

模型修整工具的界面與軟體的其餘部分是不同的.在右上方有4個標籤,一個用於過程的每一步.在螢幕的其餘部分可以是一個或三個3D視角：

• 單一視角 : 在修剪多餘步驟期間, 他一次只顯示一個顎
• 三方視角 : 在其他步驟期間, 所有的訊息被顯示在一起允許使用者從三個不同的視角觀點同時看見一切

步驟

過程展開有4個步驟:

1. 移動顎 : 調整顎的位置去符合一些參考平面 (咬合面與對稱面)
2. 修剪多餘 : 在網格上劃邊緣線以剪去將被修剪底座替換的所有的訊息
3. 調整底座 : 變化修整底座的形狀/位置以適應顎
4. 完成 : 創建完成網格, 合併切好的顎與修剪底座

移動顎

顎網格的位置與從掃描儀的採集,可能會有所不同.此工具允許用戶使用一些輔助命令調整網格的位置

對於每一個動作有4個按鈕(-10, -, +, +10),適用於物件的特定移動

所有的動作(旋轉和平移)根據一個軸被定義.此軸在三維視圖中可以看出,在左下角

還有一個額外的選項,顯示底座,允許用戶看到修整底座的預覽,有助於定位處理

Cut Margins

The jaw meshes acquired from the scanner often have residual unnecessary parts of information. This parts have to be removed before merging the data with the new trimmed base.

Fort his purpose, an interactive tool that can draw a line on the mesh surface is provided:

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 remove all the parts of the mesh below the margin.

Adjust Bases

The user can change 4 different parameters of the bases. When a parameter is changed, the 3D view updates in approximately 2 seconds.

• Width : the maximum width of the base
• Length : the maximum length of the base
• Height : the base height
• Distance : distance between the two bases, which are symmetric to the occlusal plane

After the cut, the jaw meshes 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 shows only the Finalize button. When clicked, the software takes all the data and computes the new, closed, mesh. This process can take up to 2 minutes.

If the result is not satisfactory for the user, it is possible to return to one of the previous steps, change parameters and positions and then return to the Finalize step and compute the meshes again.

Otherwise, if the finalized mesh is satisfactory, click Ok to confirm the base trimming and save the new meshes.