The Effect of Water Coolant and Bur Type on Pulp Temperature When Removing Tooth Structure and Restorative Dental Materials.

IF 1.4 4区医学 Q3 DENTISTRY, ORAL SURGERY & MEDICINE

Operative dentistry Pub Date : 2024-01-01 DOI:10.2341/23-033-L

C Mafrici, M Kingston, R Grice, P V Abbott

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引用次数: 0

Abstract

Objective: The aim was to compare intrapulp temperature (IPT) changes when flat-fissure diamond burs and pear-shaped tungsten carbide burs were used to cut tooth structure, amalgam, and composite resin with and without water coolant.

Methods: Thermocouples were inserted into the pulp chamber of extracted intact mandibular molars. The thermocouples were connected to an electronic thermometer that detects temperature every second to an accuracy of 0.1°C. IPT changes were recorded while using a high-speed handpiece during MOD cavity preparations (n=40), composite resin removal (n=40), and amalgam removal (n=40). A two-way ANOVA was used for each procedure to test for the effect of bur (pear-shaped tungsten carbide vs flat-fissured diamond) and water coolant (on vs off), with significant main effects (α=0.05) further analyzed using Tukey's multiple comparison test.

Results: During MOD cavity preparation, water coolant reduced changes in IPT (0.03±0.27°C) compared to no water coolant (1.27±0.29°C) when tungsten carbide burs were used (p<0.05) but not when diamond burs were used. During composite resin removal, tungsten carbide burs had less changes in IPT (0.55±0.18°C) compared to diamond burs (1.66±0.50°C) with no water coolant (p<0.05). Water coolant also reduced changes in IPT (0.09±0.14°C) compared to no water coolant (1.66±0.50°C) when diamond burs were used (p<0.01). Water coolant did not significantly affect IPT when tungsten carbide burs were used. During amalgam removal, tungsten carbide burs had lower changes in IPT (0.56±0.15°C) compared to diamond burs (1.88±0.43°C) with no water coolant (p<0.05). Water coolant also significantly reduced changes in IPT (0.71±0.2°C) compared to no water coolant (1.88±0.43°C) when diamond burs were used (p<0.05) but not when tungsten carbide burs were used.

Conclusions: Water coolant reduced IPT changes when drilling tooth structure with tungsten carbide burs, but not when removing amalgam or composite. Conversely, water coolant reduced IPT changes when drilling with flat fissure diamond burs to remove amalgam and composite, but not when removing tooth structure. When amalgam and composite were removed without water coolant, the tungsten carbide burs resulted in lower IPT changes than when flat fissure diamond burs were used in the same way.

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拔除牙齿结构及牙体修复材料时，水冷却剂及类型对牙髓温度的影响。

目的:比较平裂金刚石毛刺和梨形碳化钨毛刺在有和没有水冷却剂的情况下切割牙体结构、银汞合金和复合树脂时牙体内温度的变化。方法:将热电偶插入拔出的完整下颌磨牙的牙髓腔内。热电偶连接到一个电子温度计，每秒检测温度，精度为0.1°C。在MOD空腔制备(n=40)、复合树脂去除(n=40)和汞合金去除(n=40)期间，使用高速机头记录IPT变化。各工序采用双因素方差分析(ANOVA)检验bur(梨形碳化钨vs平裂金刚石)和水冷剂(开/关)的影响，显著主效应(α=0.05)进一步采用Tukey多重比较检验进行分析。结果:在MOD空腔制备过程中，与未使用水冷剂(1.27±0.29°C)相比，使用水冷剂可降低IPT变化(0.03±0.27°C)。结论:使用碳化钨毛刺钻孔时，水冷剂可降低IPT变化(0.03±0.27°C)，但去除汞合金或复合材料时，水冷剂可降低IPT变化(1.27±0.29°C)。相反，水冷剂在用平裂纹金刚石毛刺钻孔去除汞合金和复合材料时减少了IPT变化，但在去除牙齿结构时则没有。当不使用水冷剂去除汞合金和复合材料时，碳化钨毛刺的IPT变化比使用平裂金刚石毛刺的IPT变化要小。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Operative dentistry 医学-牙科与口腔外科

CiteScore

4.00

自引率

9.10%

发文量

124

审稿时长

6-12 weeks

期刊介绍： Operative Dentistry is a refereed, international journal published bi-monthly and distributed to subscribers in over 50 countries. In 2012, we printed 84 articles (672 pages). Papers were submitted by authors from 45 countries, in the categories of Clinical Research, Laboratory Research, Clinical Techniques/Case Presentations and Invited Papers, as well as Editorials and Abstracts. One of the strong points of our journal is that our current publication time for accepted manuscripts is 4 to 6 months from the date of submission. Clinical Techniques/Case Presentations have a very quick turnaround time, which allows for very rapid publication of clinical based concepts. We also provide color for those papers that would benefit from its use. The journal does not accept any advertising but you will find postings for faculty positions. Additionally, the journal also does not rent, sell or otherwise allow its subscriber list to be used by any other entity