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首页> 外文期刊>The International journal of oral & maxillofacial implants >Heat transfer to the implant-bone interface during preparation of a zirconia/alumina abutment.
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Heat transfer to the implant-bone interface during preparation of a zirconia/alumina abutment.

机译：在制备氧化锆/氧化铝基台时，热量会传递到植入物-骨的界面。

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PURPOSE: Excessive heat at the implant-bone interface may compromise osseointegration. This study examined the heat generated at the implant surface during preparation of a zirconia/alumina abutment in vitro. MATERIALS AND METHODS: Sixty zirconia/alumina abutments were randomized into 12 experimental groups. The abutments were connected to implants and embedded in an acrylic resin block in a 37 degrees C water bath. The abutments were reduced by 1 mm in height over a period of 1 minute with a high-speed handpiece and then polished for 30 seconds with a low-speed handpiece, both with and without an air/water coolant. Temperatures were recorded via thermocouples at the cervical, middle, and apical part of the implant surfaces. The Mann-Whitney rank-sum test was used to assess the statistical significance of the difference in temperature between the abutment/implant complexes altered with and without coolant. RESULTS: The 1-mm reduction with the high-speed handpiece without coolant resulted in a maximum temperature of 41.22 degrees C at the cervical portion of the implant. Three of four temperatures above 40 degrees C were observed at the cervical part of the implant following use of the high-speed handpiece without coolant. The temperature difference between "with coolant" and "without coolant" during both low-speed polishing and high-speed reduction was statistically significant at the cervical portion of the implant (P = .009). In contrast, the temperature difference between "with coolant" and "without coolant" during both low-speed polishing and high-speed reduction was not statistically significant at the middle and apical parts of the implant (P > .05). CONCLUSIONS: Preparation of a zirconia/alumina abutment caused an increase in temperature within the implant, but this temperature increase did not reach the critical levels described in the implant literature.
机译：目的：植入物-骨界面的热量过多可能会损害骨整合。这项研究检查了在体外制备氧化锆/氧化铝基台时在植入物表面产生的热量。材料与方法：60个氧化锆/氧化铝基台随机分为12个实验组。基台连接到植入物，并在37摄氏度的水浴中嵌入丙烯酸树脂块中。用高速机头在1分钟内将基台高度降低1毫米，然后用低速机头在有或没有空气/水冷却剂的情况下抛光30秒。通过热电偶在植入物表面的颈部，中部和顶部记录温度。使用Mann-Whitney秩和检验来评估使用和不使用冷却剂而改变的基台/植入物复合体之间的温度差的统计显着性。结果：在没有冷却剂的情况下，使用高速手机减小了1毫米，导致植入物子宫颈部位的最高温度达到41.22摄氏度。使用不带冷却剂的高速手机后，在植入物的子宫颈部位观察到40摄氏度以上的四个温度中的三个。在植入物的子宫颈部位，低速抛光和高速还原过程中“有冷却剂”和“无冷却剂”之间的温度差异在统计学上是显着的（P = .009）。相反，在低速抛光和高速还原过程中，“有冷却剂”和“无冷却剂”之间的温度差在植入物的中部和根尖没有统计学意义（P> .05）。结论：制备氧化锆/氧化铝基台引起了植入物内温度的升高，但是这种温度升高并未达到植入物文献中描述的临界水平。

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