Objectives of Surveying the Diagnostic cast

1. To determine the most desirable path of placement that will eliminate or minimize interference.決定可以消除或減少干擾之最適當帶入假牙的路徑
   

2. To determine the most suitable path of placement for retention & esthetics決定最適合的置入途徑以便美觀與固位
   

3. To determine whether tooth & bony areas of interference will need to be eliminated surgically or by selecting a different path of placement.決定是否有任何骨頭或牙齒之干擾需要手術消除,或是選擇另外的置入途徑
   

4. To identify proximal tooth surface that are, or need to be, made parallel確定鄰接牙牙齒表面互相平行
   

5. To delineate the height of contour畫出 height of contour
   

6. To locate & measure areas that may be used for retention定位及測量出牙齒哪些區域可以作為固位之用
   

7. To permit an accurate charting of the mouth preparation to be made製作一份mouth preparation的精確圖表
   

8. To record the cast position in relation to the selected path of placement for further reference記錄下牙齒模型與置入途徑之間的相關位置,做為未來參考用