Soldatos Nikolaos, Heydari Amanda, Horton LeRoy, Sarrami Shayda, Nordlie Luke, Choi Dongseok, Weltman Robin
Department of Regenerative and Reconstructive Sciences, School of Dentistry, Oregon Health Science University (OHSU), 2730 SW Moody Ave., Portland, OR 97201, USA.
Department of Oral Rehabilitation and Biosciences, School of Dentistry, Oregon Health Science University (OHSU), 2730 SW Moody Ave., Portland, OR 97201, USA.
J Funct Biomater. 2024 Aug 22;15(8):237. doi: 10.3390/jfb15080237.
(1) Background: OD burs are used in two different modes: (i) CW and (ii) CCW. The purpose of the study was to evaluate the Δ during the preparation of implant osteotomies in a four-way interaction. (2) Methods: Three hundred and sixty osteotomies were prepared at 12 mm depth in human cadaver tibiae. The Δ values were calculated similarly to the method used in two previous studies carried out by our group. Four different variables were evaluated for their effect on Δ. (3) Results: A four-way interaction was observed in the CCW mode, allowing for 1000 RPM to have the least effect in both modes. However, in the CCW mode the use of 3.0 and 4.0 burs after 23 osteotomies showed a statistically significant increase in Δ and significant chatter, compared to the CW mode. In the CCW mode, the Δ was increased significantly as the diameter of the burs increased in 800 and 1200 RPM. (4) Conclusions: The synergistic effect of drills' diameter, CCW mode, 800 and 1200 RPM, and bur usage (over 23 times) had a significant effect on Δ, which exceeded 47 °C. One thousand (1000) RPM had the least effect in both modes. The 3.0 and 4.0 burs in the CCW mode drastically increased the temperature and produced significant chatter.
(1) 背景：外径车针以两种不同模式使用：(i) 顺时针方向（CW）和 (ii) 逆时针方向（CCW）。本研究的目的是评估在四因素交互作用下种植体截骨术制备过程中的Δ。(2) 方法：在人类尸体胫骨上制备360个深度为12毫米的截骨术。Δ值的计算方法与我们小组之前进行的两项研究中使用的方法类似。评估了四个不同变量对Δ的影响。(3) 结果：在逆时针方向模式下观察到四因素交互作用，使得1000转/分钟在两种模式下影响最小。然而，在逆时针方向模式下，与顺时针方向模式相比，在进行23次截骨术后使用3.0和4.0的车针时，Δ有统计学显著增加且有明显震颤。在逆时针方向模式下，当车针直径在800转/分钟和1200转/分钟时增加，Δ显著增加。(4) 结论：钻头直径、逆时针方向模式、800和1200转/分钟以及车针使用次数（超过23次）的协同效应对Δ有显著影响，Δ超过47°C。1000转/分钟在两种模式下影响最小。逆时针方向模式下的3.0和4.0车针会大幅提高温度并产生明显震颤。
