Department of Oral Implantology, Peking University School and Hospital of Stomatology, 100081, Beijing, People's Republic of China.
Center of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing, People's Republic of China.
Clin Oral Investig. 2020 Apr;24(4):1401-1410. doi: 10.1007/s00784-019-03105-6. Epub 2019 Nov 21.
To assess the accuracy of intraoral digital impressions for gingival contour captured in the esthetic zone in vivo.
Five participants with full upper dentition were recruited. For each participant, three scans were taken using two intraoral scanning (IOS) systems (3Shape TRIOS Color, TRC; CEREC Omnicam, OC) respectively; three conventional impressions (CIs) were taken using vinyl polysiloxane materials. The CIs of all participants were casted and then digitized with a model scanner (IScan D103i, Imetric). Precision was evaluated by superimposing three repeated STL datasets per participant within each group and calculating the (90th-10th)percentile/2 values. The CIs were the reference for evaluating the level of system error of the two IOS systems from the true value. Digital models from CI and each IOS group were superimposed and (mean positive deviation-mean negative deviation)/2[mean negative deviation, mean positive deviation] were calculated to assess trueness level of the two IOS systems.
For the soft tissue acquisition, precision results of each group were 45.10 ± 12.54 μm in TRC, 66.04 ± 13.46 μm in OC, and 63.66 ± 17.19 in CI (TRC vs OC, p < 0.001; TRC vs CI, p = 0.001; OC vs CI, p = 0.66). Trueness results were 80.12 ± 8.69[- 112.10 ± 9.88, 48.13 ± 13.79] μm in TRC and 82.70 ± 8.85[- 121.41 ± 15.40, 43.98 ± 11.86] μm (p > 0.05).
In dentate situations, the two tested IOS systems achieved a clinically satisfying accuracy for capturing gingival contour in anterior maxilla, with a comparable or superior precision to the CI. TRC achieved a similar trueness and a higher precision level compared with OC.
Intraoral digital impressions could be a recommended method for recording 3-dimensional gingival contour in the esthetic zone.
评估体内美学区域中牙龈轮廓的口腔内数字印模的准确性。
招募了五名具有全上颌牙列的参与者。对于每个参与者，分别使用两种口腔内扫描（IOS）系统（3Shape TRIOS Color，TRC；CEREC Omnicam，OC）进行三次扫描；使用乙烯基聚硅氧烷材料进行三次常规印模（CI）。所有参与者的 CI 均被铸造，然后使用模型扫描仪（IScan D103i，Imetric）进行数字化。通过在每组内对每个参与者的三个重复 STL 数据集进行叠加，并计算（90th-10th）%/2 值来评估精度。CI 是评估两个 IOS 系统从真实值的系统误差水平的参考。将 CI 和每个 IOS 组的数字模型进行叠加，并计算（平均正偏差-平均负偏差）/2[平均负偏差，平均正偏差]，以评估两个 IOS 系统的准确性水平。
对于软组织采集，每组的精度结果分别为 TRC 中 45.10 ± 12.54 μm，OC 中 66.04 ± 13.46 μm，CI 中 63.66 ± 17.19 μm（TRC 与 OC，p < 0.001；TRC 与 CI，p = 0.001；OC 与 CI，p = 0.66）。TRC 的准确性结果为 80.12 ± 8.69[-112.10 ± 9.88，48.13 ± 13.79] μm，82.70 ± 8.85[-121.41 ± 15.40，43.98 ± 11.86] μm（p > 0.05）。
在有牙情况下，两种经过测试的 IOS 系统在前上颌区域捕获牙龈轮廓的精度达到了临床满意的程度，其精度与 CI 相当或更高。TRC 的准确性与 OC 相似，精度水平更高。
口腔内数字印模可以成为记录美学区域三维牙龈轮廓的推荐方法。
