Lauer H C, Kraft E, Rothlauf W, Zwingers T
Ludwig-Maximilians University, School of Dentistry, Munich, Fed. Rep. Germany.
J Prosthet Dent. 1990 Apr;63(4):407-14. doi: 10.1016/0022-3913(90)90228-5.
In vitro measurements of heat production in the pulp chamber during tooth preparation were performed on intact third molars. The experiments were designed to simulate physiologic temperature conditions in the tooth and oral cavity and to standardize parameters of tooth preparation. Two drive systems, the turbine and the high-speed angle, were compared by using two ranges of cooling water temperature. The critical temperature of 41 degrees C to 42 degrees C that is irreversibly harmful to pulpal tissue was not reached with a cooling water temperature of 30 degrees C to 34 degrees C. Because the temperature elevation during turbine preparation was dependent on the diminishing thickness of remaining dentin, in preparing teeth close to the pulp, a high-speed angle was advantageous.
在完整的第三磨牙上进行了牙齿预备过程中髓腔内产热的体外测量。实验旨在模拟牙齿和口腔中的生理温度条件，并规范牙齿预备参数。通过使用两个冷却水温度范围，比较了两种驱动系统，即涡轮机和高速机头。当冷却水温度为30℃至34℃时，未达到对牙髓组织有不可逆损害的41℃至42℃的临界温度。由于涡轮机预备过程中的温度升高取决于剩余牙本质厚度的减小，因此在接近牙髓的牙齿预备中，高速机头具有优势。
