Wilson David, Soileau Kristi, Esquivel Jonathan, Cordero Adriana, Buchman Wes, Maney Pooja, Archontia Palaiologou A
Int J Esthet Dent. 2017;12(2):232-242.
The aim of this study was to investigate the accuracy of digital measuring tools to measure the position of gingival zeniths and to assess its reproducibility between different examiners.
A total of 108 subjects were photographed at the Louisiana State University School of Dentistry. The settings, positioning of the digital camera, and subjects' Frankfurt levels were standardized. A photograph was taken of the six anterior maxillary teeth of each subject, and their corresponding free gingival margins. Digital caliper measurements were taken intraorally from the zenith to the incisal edge of the right maxillary central incisor. A reference line was drawn across the screen on each image at the level of the zenith of tooth 8. Three calibrated examiners then measured the distance from the reference line to the zeniths of the other five anterior maxillary teeth.
RESULTS/CONCLUSIONS: There was no statistically significant difference between the examiners regarding any of the measurements. Central incisors were at the same level in 84.24% of the subjects, and lateral incisors were within 0.5 mm of central incisors in only 58% of the subjects. Canine zeniths were within 0.5 mm of each other in 43% of the subjects. Only 28% of the subjects presented with zeniths of tooth 6 to tooth 11 within 0.5 mm of each other. Lateral incisors were at or beneath the line drawn from central incisors to cuspids in 90.8% of the subjects. Standardized digital photography taken with the aid of a stadiometer and used to evaluate esthetic parameters allowed for reproducible measurements.
本研究旨在调查数字测量工具测量牙龈顶点位置的准确性，并评估其在不同检查者之间的可重复性。
路易斯安那州立大学牙科学院对总共108名受试者进行了拍照。数码相机的设置、定位以及受试者的法兰克福平面均进行了标准化。拍摄了每位受试者上颌六颗前牙及其相应的游离龈边缘。使用数字卡尺在口内测量右上颌中切牙顶点至切缘的距离。在每张图像上，于8号牙顶点水平画一条参考线。然后，三名经过校准的检查者测量从参考线到其他五颗上颌前牙顶点的距离。
结果/结论：检查者之间在任何测量结果上均无统计学显著差异。84.24%的受试者中切牙处于同一水平，仅58%的受试者侧切牙与中切牙的距离在0.5毫米以内。43%的受试者尖牙顶点彼此之间的距离在0.5毫米以内。只有28%的受试者6号牙至11号牙的顶点彼此之间的距离在0.5毫米以内。90.8%的受试者侧切牙位于从中切牙到尖牙所画直线上或其下方。借助测高仪进行的标准化数字摄影用于评估美学参数，可实现可重复的测量。
