Department of Odontology, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark.
Departments of Pediatric Dentistry, National and Kapodistrian University of Athens, Greece.
Eur J Orthod. 2019 Aug 8;41(4):415-419. doi: 10.1093/ejo/cjy075.
To investigate if the alternating current impedance spectroscopy (ACIS) technology could be used to monitor remineralization of post-orthodontic white spot lesions (WSLs) after debonding of fixed orthodontic appliances.
The study group consisted of 28 adolescents (aged 12-16 years) with at least two WSLs on their maxillary incisors, canines, or first premolars at debonding. Buccal surfaces (n = 194) were visually examined and scored with modified International Caries Detection and Assessment System (ICDAS) criteria and with the CarieScan Pro device by three examiners according to manufactures manual (test method). In addition, 31 surfaces with ICDAS = 0 were monitored by ACIS, serving as controls. Follow-up examinations were carried out after 8 and 16 weeks. Modified ICDAS scores, captured from digital photographs by three independent examiners, served as reference method. Four patients were lost to follow-up. Data were analysed in a mixed statistical model considering systematic effects of visit, tooth and observer, random effects of patients, and visits within patients.
Over 50 per cent of all surfaces had marked WSL at baseline and the corresponding values at 8 and 16 weeks were 33 per cent and 22 per cent. The ACIS readings mirrored the visual scores; the baseline estimate (56.3) was significantly decreased after 8 weeks (P < 0.05). The lateral incisors exhibited the highest values whereas the lowest were recorded for the central incisors.
ICDAS is not the same as a 'true' gold standard. The high prevalence of WSL may jeopardize the external validity.
The ACIS technology may to some extent be used to monitor the regression of post-orthodontic WSLs.
研究交流阻抗光谱（ACIS）技术是否可用于监测固定正畸矫治器拆除后正畸后釉白斑（WSL）的再矿化。
研究组由 28 名青少年（12-16 岁）组成，他们在拆除固定正畸矫治器时至少有两颗上颌切牙、尖牙或第一前磨牙有 WSL。颊面（n=194）根据改良国际龋病检测与评估系统（ICDAS）标准和 CarieScan Pro 设备制造商手册（测试方法）由三位检查者进行肉眼检查和评分（测试方法）。此外，31 个 ICDAS=0 的表面通过 ACIS 进行监测，作为对照。8 周和 16 周后进行随访检查。三位独立检查者从数字照片中捕获改良的 ICDAS 评分，作为参考方法。有 4 名患者失访。数据采用考虑访视、牙齿和观察者系统效应，患者随机效应以及患者内访视的混合统计模型进行分析。
所有表面中超过 50%在基线时有明显的 WSL，相应的 8 周和 16 周的值为 33%和 22%。ACIS 读数与视觉评分相符；基线估计值（56.3）在 8 周后显著降低（P<0.05）。侧切牙的数值最高，而中切牙的数值最低。
ICDAS 与“真正”金标准不同。WSL 的高患病率可能会影响外部有效性。
ACIS 技术在一定程度上可用于监测正畸后 WSL 的消退。
