Ben Mohimd Hajar, Kaaouara Yassine, Azaroual Faouzi, Zaoui Fatima, Bahije Loubna, Benyahia Hicham
Institut, université Mohammed V à Rabat, centre de consultation et de traitement dentaire, faculté de médecine dentaire, département d'orthopédie dentofaciale, avenue Allal El Fassi, Mohammed Jazouli street, Al Irfane, BP 6212, Rabat, Morocco.
Institut, université Mohammed V à Rabat, centre de consultation et de traitement dentaire, faculté de médecine dentaire, département d'orthopédie dentofaciale, avenue Allal El Fassi, Mohammed Jazouli street, Al Irfane, BP 6212, Rabat, Morocco.
Int Orthod. 2019 Jun;17(2):243-248. doi: 10.1016/j.ortho.2019.03.007. Epub 2019 Apr 12.
Interproximal enamel reduction (IPR) is a clinical procedure that has been in use since the advent of non-extraction orthodontic techniques. However, such a procedure affects the surface condition of the enamel and may predispose patients to cavities and hypersensitivity. The use of a remineralizing agent is recommended to prevent these side effects. The objective of our study was to evaluate the evolution of stripped proximal dental surfaces after exposure to the oral environment for 4 months with and without fluoride protection.
Our sample consisted of 14 premolars (PM) from 6 patients of the Dentofacial Orthopaedics Department of the Consultation and Dental Treatment Centre of Rabat (CDTC) who required orthodontic treatment with PM extraction and had given their informed consent. The teeth were divided into 5 groups: group 1: intact enamel; group 2: intact enamel+fluoride varnish+4-month oral exposure; group 3: IPR (manual and mechanized)+extraction; group 4: IPR (manual and mechanized) without varnish+4-month oral exposure; group 5: IPR (manual and mechanized)+fluoride varnish+4-month oral exposure. Proximal surfaces were subjected to qualitative analysis by scanning electron microscopy and quantitative analysis by Dispersive Energy Spectroscopy (DES) to quantify the percentage of mineral elements.
Exposure of stripped dental surfaces to the oral environment for 4 months with or without fluoride protection showed the persistence of surface irregularities caused by stripping. We noted an improvement in the percentage of mineral elements for both groups with and without fluoride protection. However, the percentages of calcium (Ca) and phosphorus (P) were close to that of intact enamel in the fluoride varnish group.
Protecting stripped surfaces with fluoride varnish could help preserve the integrity of the enamel surface by restoring some of the mineral elements lost during stripping.
邻面釉质磨除术（IPR）是一种自非拔牙正畸技术出现以来就一直使用的临床操作。然而，这样的操作会影响釉质的表面状况，并可能使患者易患龋齿和过敏。建议使用再矿化剂来预防这些副作用。我们研究的目的是评估在有或没有氟保护的情况下，脱矿的邻面牙表面暴露于口腔环境4个月后的变化情况。
我们的样本包括来自拉巴特咨询与牙科治疗中心（CDTC）牙颌面正畸科的6名患者的14颗前磨牙（PM），这些患者需要拔除前磨牙进行正畸治疗并已签署知情同意书。牙齿被分为5组：第1组：完整釉质；第2组：完整釉质 + 氟漆 + 4个月口腔暴露；第3组：IPR（手动和机械）+ 拔牙；第4组：IPR（手动和机械）无氟漆 + 4个月口腔暴露；第5组：IPR（手动和机械）+ 氟漆 + 4个月口腔暴露。通过扫描电子显微镜对邻面进行定性分析，并通过能量色散光谱（DES）进行定量分析以量化矿物元素的百分比。
脱矿的牙表面在有或没有氟保护的情况下暴露于口腔环境4个月，均显示出由磨除引起的表面不规则持续存在。我们注意到有氟保护组和无氟保护组的矿物元素百分比均有所改善。然而，氟漆组中钙（Ca）和磷（P）的百分比接近完整釉质。
用氟漆保护脱矿表面有助于通过恢复磨除过程中损失的一些矿物元素来保持釉质表面的完整性。
