School of Dental Medicine, Department of Prosthodontics and Digital Technology, Stony Brook University, 1103 Westchester Hall, Stony Brook, NY, 11794-8712, USA.
School of Medicine, Department of General Dentistry, Sevilla University, Sevilla, Spain.
Clin Oral Investig. 2018 Jan;22(1):349-359. doi: 10.1007/s00784-017-2119-x. Epub 2017 Apr 22.
To evaluate the real-time bone temperature changes during the preparation of the implant bed with a single-drill protocol with different drill designs and different slow drilling speeds in artificial type IV bone.
For this experimental in vitro study, 600 implant bed preparations were performed in 10 bovine bone disks using three test slow drilling speeds (50/150/300 rpm) and a control drilling speed (1200 rpm). The temperature at crestal and apical areas and time variations produced during drilling with three different drill designs with similar diameter and length but different geometry were recorded with real-life thermographic analysis. Statistical analysis was performed by two-way analysis of variance. Multiple comparisons of temperatures and time with the different drill designs and speeds were performed with the Tukey's test.
T values for the control drilling speed with all the drill designs (D1 + 1200; D2 + 1200; D3 + 1200) were higher compared to those for the controls for 11 ± 1.32 °C (p < 0.05). The comparison of T within the test groups showed that drilling at 50 rpm resulted in the lowest temperature increment (22.11 ± 0.8 °C) compared to the other slow drilling speeds of 150 (24.752 ± 1.1 °C) and 300 rpm (25.977 ± 1.2 °C) (p < 0.042). Temperature behavior at crestal and apical areas was similar being lower for slow drilling speeds compared to that for the control drilling speed. Slow drilling speeds required significantly more time to finish the preparation of the implant bed shown as follows: 50 rpm > 150 rpm > 300 rpm > control (p < 0.05).
A single-drill protocol with slow drilling speeds (50, 150, and 300 rpm) without irrigation in type IV bone increases the temperature at the coronal and apical levels but is below the critical threshold of 47 °C. The drill design in single-drill protocols using slow speeds (50, 150, and 300 rpm) does not have an influence on the thermal variations. The time to accomplish the implant bed preparation with a single-drill protocol in type IV bone is influenced by the drilling speed and not by the drill design. As the speed decreases, then more time is required.
评估在人工 IV 型骨中使用不同钻头设计和不同低速钻速的单钻头方案制备种植床时实时骨温度变化。
在这项体外实验研究中，使用三种测试低速钻速（50/150/300rpm）和一种对照钻速（1200rpm），在 10 个牛骨盘中对 600 个种植床进行了准备。使用实际的热成像分析记录了三种不同钻头设计在钻削过程中在冠部和根尖区域产生的温度和时间变化，这些钻头设计具有相似的直径和长度，但几何形状不同。使用双因素方差分析进行统计分析。使用 Tukey 检验对不同钻头设计和速度的温度和时间进行了多次比较。
所有钻头设计（D1+1200；D2+1200；D3+1200）的对照钻速的 T 值均高于对照的 T 值，差异有统计学意义（11±1.32°C，p<0.05）。在测试组内比较 T 值时，与其他低速钻速（150rpm 的 24.752±1.1°C 和 300rpm 的 25.977±1.2°C）相比，50rpm 导致的温度升高最低（22.11±0.8°C）（p<0.042）。与对照钻速相比，低速钻速在根尖和冠部区域的温度行为相似，均较低。慢速钻削速度完成种植床准备所需的时间明显更长，结果如下：50rpm>150rpm>300rpm>对照（p<0.05）。
在 IV 型骨中，不使用冲洗的单钻头方案低速钻速（50、150 和 300rpm）会增加冠部和根尖水平的温度，但低于 47°C 的临界阈值。在低速（50、150 和 300rpm）下使用单钻头方案时，钻头设计对热变化没有影响。在 IV 型骨中完成种植床准备所需的时间受钻速影响，而不受钻头设计影响。随着速度降低，所需时间增加。
