Non-extraction treatment protocol has gained a lot of popularity over extraction for orthodontic treatment. Interproximal enamel reduction is one such method that makes it possible to do orthodontic treatment without extractions. This procedure, which can be done by various techniques, leads to a rise in the temperature of the pulp of the teeth. Previously, studies have been done which have evaluated the temperature changes inside the pulp chamber of extracted teeth, during interproximal enamel reduction. However, no documented literature exists that has evaluated these changes in the live pulp of the teeth whilst interproximal enamel reduction (IPR) is being performed. Therefore, this study aimed to evaluate the temperature changes inside the live pulp of the teeth during various interproximal enamel reduction techniques in vivo. Evaluation of temperature rise in the pulp during various interproximal enamel reduction techniques, done in vivo. The study was performed on patients for whom extraction of premolars had been advised for their orthodontic treatment. Fifty-one premolar teeth were randomly divided into three groups of IPR, i.e. using airotor and bur, handheld metal strip and orthodontic IPR kit (oscillating system). IPR was performed on the mesial and distal sides after access opening, temperature change was recorded during IPR and the readings were compared. The Shapiro-Wilk test was utilized for checking whether the data satisfied the requirement of normal distribution. The highest temperature rise was seen in group 1 in which interproximal enamel reduction was performed using airotor and bur. The minimum temperature rise was observed in group 2 in which interproximal enamel reduction was done using the handheld metal strip, whereas the temperature rise observed in group 3, in which interproximal enamel reduction was done using IPR kit, was between the range of group 1 and group 3. The temperature change was in the following order—group 1 (2.08 °C) > group 3 (1.22 °C) > group 2 (0.52 °C). None of the methods used to perform interproximal enamel reduction caused a temperature increase more than 5.5 °C, beyond which pulp necrosis may occur. Therefore, all three methods used in the study for IPR were found to be safe.

中文翻译：

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在各种IPR技术中评估纸浆中的温升-一项体内研究

与正畸治疗的拔牙相比，非拔牙治疗方案已广受欢迎。近端牙釉质的减少是一种这样的方法，使得无需提取即可进行正畸治疗。可以通过各种技术完成的该程序导致牙齿的牙髓的温度升高。以前，已经进行了一些研究，这些研究评估了牙间釉质减少过程中拔出的牙齿的牙髓腔内部的温度变化。但是，在进行近牙间牙釉质减少术（IPR）时，没有文献评估牙齿活髓中的这些变化。因此，本研究旨在评估体内各种近牙间牙釉质减少技术期间牙齿活牙髓内部的温度变化。在体内进行的各种牙间牙釉质还原技术中评估牙髓中的温升。该研究针对已建议拔除前磨牙进行正畸治疗的患者进行。将51颗前磨牙随机分为三组IPR，即使用airotor和bur，手持式金属带和正畸IPR套件（摆动系统）。通路开放后在内侧和远端进行IPR，在IPR期间记录温度变化并比较读数。Shapiro-Wilk检验用于检查数据是否满足正态分布的要求。在第1组中观察到最高的温度升高，其中使用Airotor和Bur进行了牙间牙釉质的减少。在第2组中观察到最小温升，在第2组中使用手持式金属带完成了牙间釉质的减少，而在第3组中观察到了使用IPR套件完成牙间釉质的减少，介于第1组和第2组之间。第3组。温度变化按以下顺序进行：第1组（2.08°C）>第3组（1.22°C）>第2组（0.52°C）。用于进行牙釉质间还原的方法均未导致温度升高超过5.5°C，超过此温度可能会发生牙髓坏死。因此，发现用于知识产权研究的所有三种方法都是安全的。温度在第1组和第3组之间。温度变化按以下顺序进行：第1组（2.08°C）>第3组（1.22°C）>第2组（0.52°C）。用于进行牙釉质间还原的方法均未导致温度升高超过5.5°C，超过此温度可能会发生牙髓坏死。因此，发现用于知识产权研究的所有三种方法都是安全的。温度在第1组和第3组之间。温度变化按以下顺序进行：第1组（2.08°C）>第3组（1.22°C）>第2组（0.52°C）。用于进行牙釉质间还原的方法均未导致温度升高超过5.5°C，超过此温度可能会发生牙髓坏死。因此，发现用于知识产权研究的所有三种方法都是安全的。