Pirot C, Sirimahatthanakul N, Naowanirut A, Sirithiantong T
Department of Orthopaedic Surgery, Hatyai Hospital, Songkhla, Thailand.
Malays Orthop J. 2024 Jul;18(2):77-82. doi: 10.5704/MOJ.2407.011.
Plaster of Paris splints are commonly utilised for foot and ankle injuries. However, during follow-ups, some of these splints were found to be broken. Various methods, including splint form or augmentation changes, have been explored to enhance flexural strength. However, the impact of water temperature on the splint's flexural strength still needs to be studied. This research aimed to investigate the effect of water temperature on the flexural strength of the Plaster of Paris splint.
Three groups were set up based on different water temperatures: cold, hot, and room temperature. Posterior ankle splints were created and immersed in water at these varying temperatures, with five pieces tested per group. The splints were then allowed to harden fully over three days. Each splint underwent a tensile strength test using an axial pressure machine, which recorded their flexural strength data.
There were no statistically significant differences in the general characteristics of the splints. The flexural strengths of the three splint groups (pre-cooled, pre-heated, and room temperature) were 182.6N, 162.45N, and 228.91N, respectively. Statistical analysis revealed that room-temperature splints demonstrated a statistically significant increase in flexural strength compared to pre-heated splints (p<0.05). However, they did not differ significantly from pre-cooled splints.
The highest flexural strength was observed in splints immersed in room-temperature water.
巴黎石膏夹板常用于足部和踝关节损伤。然而，在随访过程中，发现其中一些夹板出现断裂。人们探索了各种方法，包括改变夹板形状或增加加固措施，以提高抗弯强度。然而，水温对夹板抗弯强度的影响仍有待研究。本研究旨在探讨水温对巴黎石膏夹板抗弯强度的影响。
根据不同水温设置三组：冷水组、热水组和室温组。制作后踝夹板并将其浸泡在不同温度的水中，每组测试五块。然后让夹板在三天内完全硬化。使用轴向压力机对每个夹板进行拉伸强度测试，记录其抗弯强度数据。
夹板的一般特征在统计学上无显著差异。三组夹板（预冷、预热和室温）的抗弯强度分别为182.6N、162.45N和228.91N。统计分析表明，与预热夹板相比，室温夹板的抗弯强度有统计学意义的增加（p<0.05）。然而，它们与预冷夹板没有显著差异。
浸泡在室温水中的夹板抗弯强度最高。
