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首页> 外文期刊>Journal of dentistry >Longitudinal monitoring of demineralization peripheral to orthodontic brackets using cross polarization optical coherence tomography
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Longitudinal monitoring of demineralization peripheral to orthodontic brackets using cross polarization optical coherence tomography

机译：使用交叉偏振光学相干断层扫描对正畸托槽周围的脱矿质进行纵向监测

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Objectives The aim of this study was to test the hypothesis that cross-polarization optical coherence tomography (CP-OCT) can be used to longitudinally monitor demineralization peripheral to orthodontic brackets in an extended clinical study. Methods A high-speed CP-OCT system was used to acquire 3D volumetric images of the area at the base of orthodontic brackets over a period of 12 months after placement. The reflectivity was measured at 3-month intervals for 12 months to determine if there was increased demineralization. Two teeth were monitored on 20 test subjects and the brackets were bonded using two types of adhesives. This was a randomized controlled clinical study with a split mouth design such that each subject served as his or her own control. On one side, the control premolar was bonded with a bonding agent (Adper Scotchbond from 3 M ESPE, St. Paul, MN) and composite (Transbond XT from 3 M Unitek, Monrovia, CA) that lacked fluoride. On the other side, the experimental premolar was bonded with a fluoride releasing glass ionomer cement (GC Fuji Ortho LC from GC America, Alsip, IL). Results There was a small but significant increase in the calculated lesion depth and integrated reflectivity over that depth (ΔR) for both adhesive types (p < 0.0001) indicating increasing demineralization with time. There was no significant difference in the lesion depth (p = 0.22) and ΔR (p = 0.91) between the groups with the fluoride releasing glass ionomer cement and the conventional composite. Conclusions CP-OCT was able to measure a significant increase in demineralization (p < 0.0001) at the base of orthodontic brackets over a period of 12 months.
机译：目的这项研究的目的是检验以下假设：在扩展的临床研究中，交叉偏振光学相干断层扫描（CP-OCT）可用于纵向监测正畸托槽周围的脱矿质。方法在放置后的12个月内，使用高速CP-OCT系统获取正畸托槽底部区域的3D体积图像。每隔3个月测量一次反射率，持续12个月，以确定是否增加了脱矿质。在20位测试对象上监测了两颗牙齿，并使用两种类型的粘合剂将托槽粘合在一起。这是一项具有张口设计的随机对照临床研究，因此每个受试者都可以作为自己的对照。一方面，对照前磨牙用不含氟化物的粘合剂（得自美国明尼苏达州圣保罗市3 M ESPE的Adper Scotchbond）和复合材料（得自加利福尼亚州蒙罗维亚3 M Unitek的Transbond XT）粘接。另一方面，将实验前磨牙与释放氟化物的玻璃离聚物水泥（伊利诺伊州阿尔西普市的GC America的GC Fuji Ortho LC）结合。结果对于两种粘合剂类型（p <0.0001），在该深度（ΔR）上，所计算的病灶深度和积分反射率都有小幅但显着的增加（p <0.0001），表明随着时间的推移，脱矿质增加。含氟释放玻璃离子交联聚合物和传统复合材料的组之间的病变深度（p = 0.22）和ΔR（p = 0.91）没有显着差异。结论CP-OCT能够在12个月内测量出正畸托槽底部脱矿质的显着增加（p <0.0001）。

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