Division of Pediatric and Preventive Dentistry, Centre for Dental Education and Research, All India Institute of Medical Sciences, New Delhi, India.
J Indian Soc Pedod Prev Dent. 2024 Jul 1;42(3):249-254. doi: 10.4103/jisppd.jisppd_176_24. Epub 2024 Sep 9.
Uncomplicated crown fractures of maxillary anterior teeth are common dental injuries, and the bonding of fractured fragments is recommended for management. Rehydration of fragments improves bonding and fracture resistance. Therefore, the aim of this study was to compare the fracture resistance of the reattached tooth fragment of the incisor crown after rehydration using either a steamer or a humidifier.
Bovine teeth were used as a model. Fractured fragments were divided into three groups: Group I (no rehydration), Group II (rehydration by humidifier), and Group III (rehydration by steamer). Fragments were reattached using a standard bonding protocol. Fracture resistance was tested using a universal testing machine. Statistical analysis was performed using analysis of variance and Chi-square tests.
The force required to fracture the reattached fragments was significantly higher in Group II (humidifier) compared to Group I (no rehydration) (P = 0.005). Group III (steamer) had a force value similar to Group I, indicating no significant improvement in fracture resistance with steamer rehydration. The temperature inside the steam-based chamber reached an average of 95.7°C with 95% humidity, whereas the conventional humidification chamber had an average temperature of 39.2°C and 84% humidity.
Within the limitations of the present study, the rehydration protocol using a steam-based chamber was found to have a significantly lower force required to fracture the reattached fragments as compared to humidifier-based chamber. This was not significantly different from the fragments which were reattached without rehydration.
上颌前牙单纯冠折是常见的牙科损伤，推荐对折断的碎片进行粘结处理。碎片的再水化可提高粘结和抗折能力。因此，本研究旨在比较使用蒸汽室或加湿器对再水化的切牙冠折碎片进行再附着后的抗折能力。
使用牛牙作为模型。将折断的碎片分为三组：I 组（无再水化）、II 组（通过加湿器再水化）和 III 组（通过蒸汽室再水化）。碎片使用标准粘结方案进行再附着。使用万能试验机测试抗折能力。采用方差分析和卡方检验进行统计学分析。
与 I 组（无再水化）相比，II 组（加湿器）中再附着碎片断裂所需的力明显更高（P=0.005）。III 组（蒸汽室）的力值与 I 组相似，表明蒸汽室再水化对提高抗折能力没有显著作用。基于蒸汽的腔室内的温度平均达到 95.7°C，湿度为 95%，而传统的加湿腔室的平均温度为 39.2°C，湿度为 84%。
在本研究的限制范围内，与基于加湿器的腔室相比，使用基于蒸汽的腔室的再水化方案发现再附着碎片断裂所需的力明显更低。这与未再水化的碎片无显著差异。
