first premolar 中文意思是什麼
first premolar
解釋
第一前磨牙-
For an orthodontic case with the discrepancy of the discoordination between the length of palate bone and tooth size or for a case with skeletal discrepancy of the unsymmetry upper and lower jaw in their size and position, the most common treatment is to extract the upper ahd lower first or the second premolar
摘要一般矯正治療，對于齒槽骨和牙齒大小長度總和的不調和或上下顎骨骨骼性大小、位置不對稱，其處置原則通常都以上下顎第一小臼齒或第二小臼齒等4齒做為拔除對象來進行矯正治療。 -
The long axises of miniature pigs teeth are 6. 1 in the upper first molar, 6. 5 in the lower first molar, 7. 3 in the upper third premolar, 3. 8 in the lower third premolar
結論小型豬咀嚼肌的形態、起止點、肌力方向都與人類有較大的相似性；第三前磨牙與第一磨牙長軸為近中傾斜，與人類第一前磨牙和第一磨牙近似。 -
Results : with three different retainer designs, the retainer on the second premolar and the first molar exerted the smallest stress on the abutment and its periodontal tissue, while the retainer on the first premolar and the first molar had the largest stress
結果：在3種不同的固位體設計方式中，固位體放置在第二前磨牙與第一磨牙之間時，基牙及牙周組織受力最小；固位體放置在第一前磨牙與第一磨牙上，基牙與牙周組織受力最大。
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