The aim of the present study was to compare the accuracy of the actual space obtained through interproximal enamel reduction (IPR) compared to the amount of IPR planned through the digital setup during clear aligner treatment (CAT). A total of 10 clinicians were randomly recruited using the Doctor Locator by Align Technology (California). For each clinician, four consecutive patients treated with CAT and manual stripping were selected for a total of 40 subjects and 80 dental arches. For each patient, the amount of planned IPR and the amount of actual IPR performed were recorded. Each arch was considered individually. For each arch, the mesio-distal tooth measurements were obtained from second to second premolars. No systematic measurement errors were identified. In 25 cases, stripping was planned and performed in both arches; in 4 cases only in the upper arch and in the remaining 7 cases only in the lower arch. The difference between planned IPR and performed IPR was on average 0.55 mm (SD, 0.67; P = 0.022) in the upper arch and 0.82 mm (SD, 0.84; P = 0.026) in the lower arch. The accuracy of IPR in the upper arch was estimated to be 44.95% for the upper arch and 37.02% for the lower arch. Overall, this study showed that the amount of enamel removed in vivo did not correspond with the amount of IPR planned. In most cases, the performed IPR amount was lower than planned. When considering the actual amount in millimeter, these differences may not be considered clinically relevant.

中文翻译：

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清除对准剂过程中牙间釉质减少的准确性。

本研究的目的是比较通过近端牙釉质减少（IPR）获得的实际空间的精确度与通过透明对准器处理（CAT）期间通过数字设置计划的IPR量的准确性。使用Align Technology（加利福尼亚州）的Doctor Locator随机招募了总共10名临床医生。对于每位临床医生，选择了四名接受CAT和手动剥离的连续患者，共计40名受试者和80个牙弓。对于每个患者，记录计划的IPR量和执行的实际IPR量。每个拱门都被单独考虑。对于每个牙弓，从第二至第二前磨牙获得近中牙测量值。没有发现系统的测量误差。在25个案例中，计划并在两个拱门中执行剥离；4例仅在上牙弓，其余7例仅在下牙弓。计划的IPR和执行的IPR之间的差异在上牙弓平均为0.55 mm（SD，0.67; P = 0.022），在下牙弓平均为0.82 mm（SD，0.84; P = 0.026）。上弓的IPR精度估计为上弓的44.95％和下弓的37.02％。总体而言，这项研究表明，体内去除的牙釉质与计划的IPR数量不符。在大多数情况下，已执行的IPR数量低于计划。当考虑以毫米为单位的实际数量时，这些差异可能不被认为具有临床意义。下牙弓82毫米（SD，0.84; P = 0.026）。上弓的IPR精度估计为上弓的44.95％和下弓的37.02％。总体而言，这项研究表明，体内去除的牙釉质与计划的IPR数量不符。在大多数情况下，已执行的IPR数量低于计划。当考虑以毫米为单位的实际数量时，这些差异可能不被认为具有临床意义。下牙弓82毫米（SD，0.84; P = 0.026）。上弓的IPR精度估计为上弓的44.95％和下弓的37.02％。总体而言，这项研究表明，体内去除的牙釉质与计划的IPR数量不符。在大多数情况下，已执行的IPR数量低于计划。当考虑以毫米为单位的实际数量时，这些差异可能不被认为具有临床意义。