Bakri Rasdiana, Ranggang Baharuddin M, Hidayati Nasyrah
Department of Orthodontics, Faculty of Dentistry, Hasanuddin University, Indonesia.
J Orthod Sci. 2025 Mar 25;14:7. doi: 10.4103/jos.jos_58_24. eCollection 2025.
This study aimed to determine the difference in force decay between latex and non-latex elastic bands based on duration of use and salivary pH concentration.
The calculation of the sample size in this study used Federer. Total sample size is 80 and divided into four groups. First group consists of 20 elastic bands made from latex immersed in artificial saliva pH 5.2, second group consists of 20 elastic bands made from latex immersed in artificial saliva pH 6.7, third group consists of 20 elastic bands made from non-latex immersed in artificial saliva pH 5.2, and fourth group consists of 20 non-latex elastic bands immersed in artificial saliva pH 6.7. All samples were incubated at 37°C, and force magnitude was measured with a digital force gauge.
The most force decay occurred in the first 24 hours when immersed in artificial saliva and was constant for up to 72 hours The elastic band immersed in salivary pH concentration showed greater force decay compared with pH 6.7 both latex and non-latex.
There was a significant difference in force decay of elastic bands made from latex and non-latex based on duration of elastic use. Force decay of elastic bands made from non-latex was greater than latex material. There was a difference in force decay elastic bands made from latex and non-latex based on the pH concentration of saliva. Force decay elastic band made from non-latex is greater than latex material and greater at pH 5.2 compared to 6.7.
本研究旨在根据使用时长和唾液pH浓度,确定乳胶和非乳胶弹力带之间的力衰减差异。
本研究样本量的计算采用费德勒法。总样本量为80,分为四组。第一组由20条浸入pH值为5.2的人工唾液中的乳胶弹力带组成,第二组由20条浸入pH值为6.7的人工唾液中的乳胶弹力带组成,第三组由20条浸入pH值为5.2的人工唾液中的非乳胶弹力带组成,第四组由20条浸入pH值为6.7的人工唾液中的非乳胶弹力带组成。所有样本均在37°C下孵育,并用数字测力计测量力的大小。
浸入人工唾液后的前24小时内,力衰减最为明显,且在长达72小时内保持恒定。与pH值为6.7的情况相比,无论是乳胶还是非乳胶,浸入唾液pH浓度中的弹力带都表现出更大的力衰减。
基于弹力带的使用时长,乳胶和非乳胶弹力带在力衰减方面存在显著差异。非乳胶弹力带的力衰减大于乳胶材料。基于唾液的pH浓度,乳胶和非乳胶弹力带在力衰减方面存在差异。非乳胶弹力带的力衰减大于乳胶材料,且在pH值为5.2时比pH值为6.7时更大。