Dental Materials Section, Department of Oral Rehabilitation, Medical College of Georgia, Augusta, GA, USA.
J Esthet Restor Dent. 2010 Oct;22(5):314-22. doi: 10.1111/j.1708-8240.2010.00358.x.
Composite preheating has shown to improve material physical properties in vitro, but no data exist on the use of this technique in vivo during placement.
The study aims to measure in vivo prepared tooth surface temperature during a restorative procedure using resin composite either at room temperature (23.6°C) or preheated to 54.7°C in a commercial compule heating device set to heat at 60°C.
Class I preparations (N=3) were made on a patient requiring multiple posterior restorations. A probe containing two thermocouples was used to record temperature values at the tooth pulpal floor and 2mm higher (top of the tooth preparation/restoration) after tooth preparation (prep), acid etching (etch), placement and curing of a bonding agent (BA), and during placement of composite used at room temperature (RT) or preheated in a commercial device (Calset(TM) , AdDent Inc., Danbury, CT, USA) set to 60°C. Data were compared with two-way analysis of variance, Tukey-Kramer post hoc test (α=0.05).
No significant difference in pulpal floor temperature existed between prep (27.8°±1.3°C) and etch (26.3°±1.3°C), which were significantly lower than BA (30.5°±1.3°C) (p=0.0001). Immediate placement of preheated composite resulted in significantly higher pulpal floor (36.2°±1.9°C) (p=0.0025) and top composite temperatures (38.4°±2.2°C) (p=0.0034) than RT values (30.4°±2.2°C and 29.6°±0.9°C, respectively).
In vivo use and placement of preheated resin composite resulted in temperature increase of 6° to 8°C than room temperature material. These values, however, were much lower than expected.
Although having many potential benefits, composite preheating may not be as clinically effective in delivering resin of predetermined temperature at the time of cure as laboratory experiments would suggest. Despite only moderate composite temperature increase over use of room temperature material, preheating still provides advantages in terms of ease of handling and placement.
复合材料预热已被证明可以改善体外材料的物理性能，但在体内放置过程中使用这种技术的数据尚不存在。
本研究旨在使用商业复合加热设备（设置在 60°C 下加热）将室温（23.6°C）或预热至 54.7°C 的树脂复合材料在修复过程中测量活体内预备牙表面温度。
对需要多个后牙修复的患者进行 I 类预备（N=3）。使用含有两个热电偶的探头记录预备后（prep）、酸蚀（etch）、粘结剂（BA）放置和固化、室温（RT）下放置复合材料以及在商业设备（Calset(TM) ，AdDent Inc.，Danbury，CT，USA）中预热至 60°C 下放置复合材料时牙牙髓底部和牙预备顶部（牙预备/修复的 2mm 高处）的温度值。使用双向方差分析和 Tukey-Kramer 事后检验（α=0.05）比较数据。
牙髓底部温度在预备（27.8°C±1.3°C）和酸蚀（26.3°C±1.3°C）之间无显著差异，明显低于 BA（30.5°C±1.3°C）（p=0.0001）。立即放置预热复合材料会导致牙髓底部（36.2°C±1.9°C）（p=0.0025）和顶部复合材料温度（38.4°C±2.2°C）（p=0.0034）显著高于 RT 值（30.4°C±2.2°C 和 29.6°C±0.9°C）。
与室温材料相比，活体内使用和放置预热树脂复合材料会导致温度升高 6°C 至 8°C。然而，这些值远低于预期。
尽管具有许多潜在的好处，但在治疗时将预定温度的树脂输送到活体内，复合材料预热的效果可能不如实验室实验所表明的那样有效。尽管与使用室温材料相比，复合材料的温度仅适度升高，但预热仍在易于处理和放置方面提供了优势。
