Chancharoen Sarun, Santiwong Peerapong, Seriwatanachai Dutmanee, Khantachawana Anak, Chintavalakorn Rochaya
Department of Orthodontics, Faculty of Dentistry, Mahidol University, Bangkok 10400, Thailand.
Department of Oral Biology, Faculty of Dentistry, Mahidol University, Bangkok 10400, Thailand.
Materials (Basel). 2022 Jul 25;15(15):5151. doi: 10.3390/ma15155151.
A new design of an alveolar distractor using nickel−titanium (NiTi) open-coil springs was developed and investigated to produce distraction forces against the tensile forces of porcine attached gingiva to simulate human gingiva. We subjected 15 mm long NiTi open-coil springs (Highland and ORMCO) with three levels of forces (light, medium and heavy) to mechanical testing in a 37 ± 1 °C water bath. Ten strips of porcine mandibular attached gingiva were subjected to tensile tests to determine the resistance force. The forces from the springs were compared with the tensile forces from the porcine attached gingiva. Data between groups were analyzed with independent-samples T-tests (p-value < 0.05). The tensile strength and the Young modulus were greater in buccal compared to lingual porcine attached gingiva. Compared to other spring dimensions and companies, forces generated from 0.014 × 0.036″ ORMCO springs were the highest and could overcome the tensile resistance from porcine attached gingiva over the longest distraction range of 1.6 mm. This preliminary in vitro study introduced a new design of an alveolar distractor incorporated with NiTi open-coil springs that could generate light and continuous forces to overcome the resistance from porcine attached gingiva.
开发并研究了一种使用镍钛（NiTi）开圈弹簧的新型牙槽骨撑开器设计，以产生对抗猪附着龈拉力的撑开力，从而模拟人类牙龈。我们将15毫米长的NiTi开圈弹簧（Highland和ORMCO），施加三种水平的力（轻、中、重），在37±1°C的水浴中进行力学测试。对十条猪下颌附着龈条进行拉伸试验以确定阻力。将弹簧产生的力与猪附着龈的拉力进行比较。组间数据采用独立样本T检验进行分析（p值<0.05）。猪颊侧附着龈的拉伸强度和杨氏模量高于舌侧。与其他弹簧尺寸和公司相比，0.014×0.036英寸的ORMCO弹簧产生的力最高，并且在最长1.6毫米的撑开范围内能够克服猪附着龈的拉伸阻力。这项初步的体外研究引入了一种结合NiTi开圈弹簧的新型牙槽骨撑开器设计，该设计可以产生轻柔且持续的力来克服猪附着龈的阻力。
