Liu M, Zhang J D, Ye H Q, Zhao Y J, Zhao X B, Zhao W Y, Liu Y S, Zhou Y S
Department of Prosthodontics, Peking University School and Hospital of Stomatology & National Clinical Research Center for Oral Diseases & National Engineering Laboratory for Digital and Material Technology of Stomatology & Beijing Key Laboratory of Digital Stomatology, Beijing 100081, China.
Center of Digital Dentistry, Peking University School and Hospital of Stomatology, Beijing 100081, China.
Beijing Da Xue Xue Bao Yi Xue Ban. 2020 Feb 18;52(1):187-192. doi: 10.19723/j.issn.1671-167X.2020.01.030.
To explore the possibility of the Smile Lite MDP (Smile Lite Mobile Dental Photograph) portable dental photography system applying in anterior teeth aesthetic photography, and to provide the chance to simplify aesthetic photography process and facilitate communication among patients, dentists and dental technitians.
The Smile Lite MDP photography system combined with the smartphone were used to photograph the front occlusal phase photos of anterior teeth. The photographic conditions including the color temperature parameter, the Smile Lite MDP light position and the intensity settings were explored. The best photographic conditions were chosen by blind evaluation within experienced dentists and technicians through the method of the visual analogue scale/score (VAS) evaluation, which went through statistical analysis to figure out the optimum photograghic conditions. Smile Lite MDP photography system was used to photograph the front occlusal phase photos of anterior teeth under the optimum parameter by different magnifications. The width/height ratio of the central incisor and the front width ratio of the upper anterior teeth in those photos were measured and calculated respectively. The accuracy of the anterior teeth photos taken by Smile Lite MDP photography system was analyzed based on the photographs taken by digital single lens reflex (DSLR) camera.
The optimum color temperature parameter of Smile Lite MDP portable camera system was 5 000 K, the optimum magnification was 4 times, the best light position was the side lights of Smile Lite MDP, the optimum intensity of lights was 2 grades. Photos taken by the optimum parameters won the highest score during the VAS evaluation and the result of statistical analysis had significant difference compared with other groups (P<0.05). When comparing the photos of the upper anterior teeth taken by the Smile Lite MDP portable photography system using 4 times magnification or by DSLR using the standard parameters, there was no significant difference neither in the width/hieght ratio of the central incisor nor in the front width ratio of the upper anterior teeth (P>0.05).
The Smile Lite MDP portable dental photography system applying in anterior teeth aesthetic analysis photography was capable to show the color and shape of anterior teeth in an accurate way by using the right photography parameters. Therefore, Smile Lite MDP portable dental photography system was considered to be a simple and easy photographic tool in clinical work.
探讨Smile Lite MDP（Smile Lite移动牙科摄影）便携式牙科摄影系统应用于前牙美学摄影的可能性，为简化美学摄影流程、促进患者、牙医和牙科技师之间的沟通提供契机。
使用Smile Lite MDP摄影系统结合智能手机拍摄前牙正面咬合位照片。探索包括色温参数、Smile Lite MDP灯光位置和强度设置在内的摄影条件。通过视觉模拟量表/评分（VAS）评估方法，在经验丰富的牙医和技师中进行盲法评估，选择最佳摄影条件，并进行统计分析以确定最佳摄影条件。使用Smile Lite MDP摄影系统在最佳参数下以不同放大倍数拍摄前牙正面咬合位照片。分别测量并计算这些照片中中切牙的宽/高比和上前牙的正面宽度比。基于数码单反（DSLR）相机拍摄的照片分析Smile Lite MDP摄影系统拍摄的前牙照片的准确性。
Smile Lite MDP便携式相机系统最佳色温参数为5000K，最佳放大倍数为4倍，最佳灯光位置为Smile Lite MDP侧光，最佳灯光强度为2级。最佳参数拍摄的照片在VAS评估中得分最高，统计分析结果与其他组相比有显著差异（P<0.05）。比较Smile Lite MDP便携式摄影系统使用4倍放大倍数拍摄的上前牙照片与DSLR使用标准参数拍摄的照片，中切牙的宽/高比和上前牙的正面宽度比均无显著差异（P>0.05）。
Smile Lite MDP便携式牙科摄影系统应用于前牙美学分析摄影时，通过正确的摄影参数能够准确显示前牙的颜色和形态。因此，Smile Lite MDP便携式牙科摄影系统被认为是临床工作中一种简单易用的摄影工具。
